CN117948486A - Static pressure split pipe short pipe replacement method - Google Patents
Static pressure split pipe short pipe replacement method Download PDFInfo
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- CN117948486A CN117948486A CN202410162565.3A CN202410162565A CN117948486A CN 117948486 A CN117948486 A CN 117948486A CN 202410162565 A CN202410162565 A CN 202410162565A CN 117948486 A CN117948486 A CN 117948486A
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- 238000000034 method Methods 0.000 title claims abstract description 76
- 230000003068 static effect Effects 0.000 title claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 48
- 239000010865 sewage Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000007689 inspection Methods 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 238000009423 ventilation Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 44
- 239000010959 steel Substances 0.000 claims description 44
- 238000003780 insertion Methods 0.000 claims description 15
- 230000037431 insertion Effects 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 10
- 239000002689 soil Substances 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 238000005336 cracking Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 210000002445 nipple Anatomy 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 12
- 230000008439 repair process Effects 0.000 abstract description 9
- 239000003921 oil Substances 0.000 description 101
- 238000009412 basement excavation Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/18—Appliances for use in repairing pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a static pressure split pipe short pipe replacement method, which can be used for repairing collapsed and blocked pipelines, improving the repair quality and the repair efficiency of an urban underground pipe network, reducing the repair difficulty and reducing the construction cost; in the process of pipeline repair, road surfaces are not damaged, ground traffic is disturbed, and the influence on existing structures and underground pipelines around construction is small; the method comprises the following steps: enclosing an inspection well region, opening a well for ventilation and detecting gas; sewage diversion and dismantling a flume; installing a first oil top workbench and a second oil top workbench; installing a push rod and a direction-adjusting centralizer to dredge the original pipeline; adjusting the mounting position of the first oil top workbench; installing an extruding and expanding device and replacing the original pipeline; and dismantling the first and second oil top working tables, repairing the inspection well, detecting the pipeline, closing the water test, and dismantling the enclosure after the test is qualified.
Description
Technical Field
The invention relates to the technical field of municipal pipeline engineering, in particular to a static pressure split pipe short pipe replacement method.
Background
With the rapid development of cities, the scale of urban underground pipe networks is also larger and larger, and the normal operation of the urban underground pipe networks is an important condition for ensuring the normal operation of urban infrastructure. However, the construction standard of the road drainage pipe network in partial urban areas is low, and the problems of weak infrastructure such as small pipe caliber, pipe deformation, damage and the like are prominent along with the time, and moreover, most of underground pipes are rainwater and sewage converging pipes, the sewage pipes are almost blocked by sludge, the pipes cannot drain water in time in heavy rainfall weather, a plurality of ponding points are easy to appear on the road, the normal operation of the infrastructure on the ground is influenced, and the rainwater and sewage pipe network is a matter that people are forced to be in the eyebrow in every city.
The rain and sewage pipe network is usually constructed by adopting a direct excavation method, the road surface can be damaged in a large area by the direct excavation method, the construction period is long, and the vehicle traffic and pedestrian travel can be greatly influenced; moreover, the underground pipeline is intricate and complex, the direct excavation is easy to influence structures and underground pipelines around construction, the excavation difficulty and the construction cost can be increased, and the economic benefit is low. With the development of rain and sewage pipe network repairing technology, a non-excavation method is gradually adopted to carry out pipeline repairing, for example, chinese patent application publication No. CN 116357832A discloses a municipal pipeline static pressure cracking pipe repairing device and method, and pipeline repairing can be carried out through the device and method, so that the influence of traffic blocking on production and life of residents can be avoided, however, the device and method are only suitable for the situation that a pipeline is smooth and is not suitable for the situation that the pipeline is collapsed and blocked, and under the situation that the pipeline is blocked, a jacking pull rod cannot pass through the pipeline, a pipe head is easy to be blocked, and the pipeline repairing quality is influenced.
In the rain and sewage pipe network remediation process, the following problems generally exist: firstly, in the use process of the pipeline, phenomena such as deposition, scaling and the like can occur in the pipeline, burrs and protrusions can occur on the inner wall of the pipeline, soil can subside, collapse and block the pipeline after the pipeline is deformed and damaged, in the non-excavation rehabilitation and repair process of the pipeline, the pipeline is required to be kept smooth so that a traction pull rod or a steel wire rope passes through the pipeline, and after the pipeline is blocked, the traction pull rod or the steel wire rope cannot pass through the pipeline according to the existing route, so that the pipeline is difficult to repair; secondly, in the process of pipeline rehabilitation by adopting a traction pull rod, an oil cylinder is required to provide power, the strength and the stability of the oil cylinder in a well chamber are critical to the smooth performance of pipeline rehabilitation, and if the counter force in the working process of the oil cylinder cannot be effectively dispersed, the reliability of the oil cylinder and the smooth performance of pipeline rehabilitation are affected; thirdly, the oil cylinder in the well chamber is always connected with the traction pull rod, and the insertion of the new pipeline can interfere with the traction pull rod, so that the insertion efficiency of the new pipeline is affected.
Disclosure of Invention
At least one of the purposes of the invention is to provide a static pressure split pipe short pipe replacement method aiming at overcoming the problems existing in the prior art, and the method can be used for repairing collapsed and blocked pipelines, so that the quality and efficiency of repairing urban underground pipe networks are improved, the difficulty of pipeline repairing is reduced, and the construction cost is reduced.
In order to achieve the above object, the present invention adopts a technical scheme including the following aspects.
A static pressure split pipe short pipe replacement method comprises the following steps:
step A, enclosing an inspection well area, opening a well for ventilation, and detecting gas in a pipeline;
step B, sewage diversion; the air bag is plugged into an upstream pipeline, and the air pump is inflated to completely isolate an upstream water source; installing a sewage pump to pump water to a downstream drain pipeline; after the sewage is pumped, the water flow groove is removed;
Step C, installing a first oil top workbench in the receiving well and installing a second oil top workbench in the inserting well, and respectively connecting the first oil top workbench and the second oil top workbench with an oil way control system on the ground;
step D, installing a mandril and a direction-adjusting centralizer, and dredging the original pipeline;
e, adjusting the installation position of a first oil top workbench in the receiving well to enable the first oil top to be reversed;
Step F, installing an extruding and expanding device in the insertion well and replacing the original pipeline;
G, removing the first oil top workbench and the second oil top workbench, and repairing the inspection well;
And step H, detecting the replaced pipeline, performing a water closing test, and removing the enclosure after the test result meets the requirement.
Preferably, in the step C, when the first oil top working platform is installed, an installation position of the first oil top working platform is determined according to a working state of the first oil top; when the first oil jack is used for jacking the ejector rod, the first bearing structure is arranged on a well wall opposite to the pipeline opening of the original pipeline, so that the bearing steel plate is attached to the well wall, and the bottom of the bearing steel plate and the bottom of the I-steel are embedded into the ground; when the first oil jack is used for pulling out the ejector rod, the first bearing structure is arranged on the well wall of the pipeline opening of the original pipeline.
Preferably, the step D includes: step D1, coaxially arranging a direction-adjusting centralizer at the first end of the first section of ejector rod unit; step D2, sequentially lowering the ejector rod units into the receiving well, and ejecting the first ejector rod unit into the original pipeline by the first oil jack after the second end of the first ejector rod unit is connected with the first oil jack; step D3, disconnecting the first oil jack from the installed ejector rod unit, connecting the first end of the next ejector rod unit with the installed ejector rod unit, connecting the second end of the next ejector rod unit with the first oil jack, and pushing the ejector rod unit into the original pipeline by the first oil jack; and D4, repeating the step D3 until all the ejector rod units are ejected into the insertion well from the receiving well.
Preferably, the step F includes: installing a squeezing and expanding device at the position of a pipeline opening of an original pipeline in an insertion well, wherein the squeezing and expanding device is detachably connected or abutted with the direction-adjusting centralizer; and each time the first oil jack pulls out a section of ejector rod unit from the original pipeline, the second oil jack pushes a section of new pipe section into the original pipeline until the original pipeline is completely replaced by the new pipe section.
Preferably, the step F includes: the first oil jack pulls back the ejector rods, and all ejector rod units are pulled out of the receiving well; installing a squeezing and expanding device at the position of a pipeline opening of the original pipeline in the insertion well, and pushing the squeezing and expanding device into the original pipeline by the second oil roof and the top plate; after the first new pipe joint is connected with the extruding and expanding device, the second oil top and the top plate push the new pipe joint into the original pipeline; after the next new pipe joint is connected with the installed new pipe joint, pushing the new pipe joint into the original pipeline by the second oil roof and the top plate; the connection and pushing of the new pipe section are repeated until the original pipe is replaced by the new pipe section.
Preferably, before the squeeze-expander is installed, a direction-adjusting centralizer is installed in the original pipeline, and the direction-adjusting centralizer is connected with the squeeze-expander.
Preferably, in the step F, before the new pipe joint is pushed into the original pipe in the original pipe replacement process, bentonite slurry is smeared on the outer wall of the new pipe joint; and after the replacement of the original pipeline is finished, if an annular part exists between the new pipeline and soil surrounding the new pipeline, grouting and filling the annular part.
Preferably, the steering centralizer comprises a conical tip, and the conical tip diameter is smaller than the conical bottom diameter.
Preferably, the steering centralizer further comprises a steering ball coaxially arranged with the cone tip, the steering ball being arranged between the ejector rod unit and the cone tip, or the steering ball being arranged between two opposite cone tips.
Preferably, the extruding and expanding device is of a solid or hollow cylindrical structure, a plurality of guiding drill blades are circumferentially arranged on the outer wall of the extruding and expanding device, and a positioning ring is coaxially arranged on the extruding and expanding device.
In summary, due to the adoption of the technical scheme, the invention has at least the following beneficial effects:
By arranging the direction-adjusting centralizer, the resistance in the jacking of the ejector rod or the replacement process of the new pipe section can be reduced, the offset in the jacking of the ejector rod or the replacement process of the new pipe section is prevented, and the smooth implementation of the replacement process of the new pipe section is ensured; under the action of the direction-adjusting centralizer, the ejector rod can be ejected into the collapsed and blocked pipeline according to the existing route.
In the replacement process of the new pipe joint, the ejector rod is connected with the first oil jack, and the pulling-out process of the ejector rod cannot interfere with the installation process of the new pipe joint, so that the replacement efficiency of the new pipe joint is greatly improved; the new pipe joint can be installed after the ejector rod is completely pulled out of the original pipeline, and the new pipe joint can be separated from the ejector rod; in the new pipe joint installation process, the alignment centralizer is installed before the installation of the extruding and expanding device, so that obstacles in the original pipeline can be further cleaned, and the smooth installation of the new pipeline is ensured.
The first oil top workbench comprises a first oil top and a first bearing structure, the second oil top workbench comprises a second oil top and a second bearing structure, the first bearing structure and the second bearing structure can disperse counter force in the working process of the first oil top and the second oil top to a well wall respectively, so that the first oil top and the second oil top keep stability, and the smooth proceeding of a new pipe joint replacement process is ensured.
In the replacement process of the new pipe joint, a new working well is not required to be excavated additionally, damage to a road surface is avoided, road traffic is not disturbed, and the influence on buildings and underground pipelines nearby construction is small. The method can replace the pipeline with the length of 30-50 m every day, greatly improves the efficiency and quality of pipeline repair, and has great economic benefit in the process of repairing large-area underground pipe network; in the process of pipeline repair, the method is suitable for pipelines with the buried depth not less than 2m, not only suitable for pipelines with shallow buried depth, but also suitable for pipelines with deep buried depth, and has high construction quality and construction efficiency for underground pipelines with corrugated pipes and concrete pipes as the original pipelines.
Drawings
FIG. 1 is a schematic structural view of a static pressure split pipe spool replacement device according to an exemplary embodiment of the present invention.
Fig. 2 is a schematic view showing a connection structure of the ejector pin unit and the steering centralizer according to an exemplary embodiment of the present invention.
Fig. 3 is a schematic diagram of a steering centralizer according to another example embodiment of the invention.
Fig. 4 is a schematic view showing a connection structure of a steering centralizer and a carrier rod unit according to another exemplary embodiment of the present invention.
FIG. 5 is a schematic illustration of a steering centralizer and swage expander connection according to an exemplary embodiment of the invention.
Fig. 6 is an enlarged schematic view of an adjacent new pipe section connection location according to an exemplary embodiment of the present invention.
Fig. 7 is a side view of an wringer structure according to an exemplary embodiment of the present invention.
FIG. 8 is a flow chart of hydrostatic split pipe spool replacement according to an exemplary embodiment of the present invention.
The marks in the figure are as follows: 1-first oil top workbench, 11-first oil top, 12-first bearing structure, 2-second oil top workbench, 21-second oil top, 22-second bearing structure, 23-top plate, 3-top rod, 31-top rod unit, 4-squeeze expander, 41-guiding drilling blade, 42-positioning ring, 5-steering centralizer, 51-steering ball, 52-conical tip, 53-connecting rod, 6-new pipe joint, 7-original pipe, 8-receiving well, 9-insertion well and a-sealing ring.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, so that the objects, technical solutions and advantages of the present invention will become more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, the static pressure split pipe nipple replacement unit according to an exemplary embodiment of the present invention includes a first oil top table 1 disposed in a receiving well 8 and a second oil top table 2 disposed in an insertion well 9, and further includes a jack 3, a squeeze expander 4, a steering centralizer 5, and a new pipe joint 6; the first oil top workbench 1 is used for applying pressure to the ejector rod 3 to jack the ejector rod 3 into the original pipeline 7 or applying tension to the ejector rod 3 to pull the ejector rod 3 out of the original pipeline 7; the ejector rod 3 comprises a plurality of ejector rod units 31 which are connected in sequence, and the ejector rod 3 is used for cleaning the original pipeline so as to keep the original pipeline in a smooth state; the extruding and expanding device 4 is used for crushing the original pipeline 7 and extruding the original pipeline 7 into soil around the original pipeline 7; the direction-adjusting centralizer 5 is arranged on the ejector rod 3 and is used for correcting and orienting so that the ejector rod 3 can jack along the original pipeline wall; the second oil top table 2 is used for pushing the new pipe section 6 into the original pipe 7 so that the original pipe 7 is replaced by the new pipe section 6, and the second oil top table 2 is also used for applying pressure to the squeezing expander 4 and the new pipe 6 so that the squeezing expander 4 and the new pipe 6 advance in the original pipe 7 and crush the original pipe 7.
The first oil top workbench 1 comprises a first oil top 11 and a first load-carrying structure 12, the first oil top 11 is connected with an oil circuit control system, and the oil circuit control system is used for controlling the working state of the first oil top 11 so that the first oil top 11 can be pushed into or pulled out of the ejector rod 3; the first bearing structure 12 comprises a bearing steel plate and I-steel, wherein the bearing steel plate is arranged on the wall of the receiving well 8, the bottom of the bearing steel plate is embedded underground, the bearing steel plate is provided with mounting holes, the two I-steel are oppositely arranged at two sides of the mounting holes of the bearing steel plate, and the bottom of the I-steel is embedded underground; the first oil dome 11 is disposed between the two I-beams and passes through the mounting hole. The counter force can be generated in the process of jacking or pulling out the ejector rod 3 by the first oil jack 11, the counter force generated in the working process of the first oil jack 11 can be uniformly dispersed to the bearing steel plate by the two I-shaped steels, and then the counter force is uniformly transmitted to the wall of the receiving well 8 by the bearing steel plate, so that the force dispersion effect is improved, the stability of the first oil jack 11 is kept in the working process, and the smooth jacking or pulling-out operation of the ejector rod 3 is ensured. The size of the bearing steel plate is larger than the diameter of the original pipeline 7, and in the use process, the bearing steel plate completely covers the pipeline opening and is clung to the well wall; the length of the bearing steel plate is 1-1.5 m, the width of the bearing steel plate is 1-1.5 m, and the thickness of the bearing steel plate is 5-8 cm; i20a I-steel is adopted, the length of each I-steel is 1.5m, and the I-steel is embedded into the underground by 0.5m. The oil cylinder of the first oil jack 11 is a hollow oil cylinder, the aperture of the oil cylinder is 5-8 cm larger than the diameter of the ejector rod unit, the ejector rod unit 31 can smoothly pass through the oil cylinder, and the oil cylinder can provide preset acting force for the ejector rod unit; the outer diameter of the first oil dome 11 is not larger than the diameter of the original pipe 7. In the use process, the oil cylinder is preferably a 50t hydraulic oil cylinder, and the first oil jack is preferably a 150t hydraulic jack.
The second oil top workbench 2 comprises a second oil top 21 and a second bearing structure 22, and the second oil top 21 provides power for pushing in the extruding and expanding device 4 and the new pipe joint 6; the second bearing structure 22 comprises a bearing steel plate and I-steel, wherein the bearing steel plate is arranged on the wall of the insertion well 9, the bottom of the bearing steel plate is embedded underground, the bearing steel plate is provided with mounting holes, the two I-steel are oppositely arranged at two sides of the mounting holes of the bearing steel plate, and the bottom of the I-steel is embedded underground; the second oil jack 21 is arranged between the two I-beams and penetrates through the mounting hole; the second oil roof 21 is provided with a top plate 23, the top plate 23 is used for pushing the new pipe joint 6 into the original pipeline 7, and the top plate 23 is made of a steel plate with the thickness of 3-5 cm. In use, the first jack 21 is preferably a 150t hydraulic jack, and the cylinder of the first jack 21 is preferably a50 t hydraulic cylinder.
The ejector rod units 31 are cylindrical rod pieces, the first ends of the ejector rod units 31 are provided with internal threads, the second ends of the ejector rod units 31 are provided with external threads, adjacent ejector rod units 31 are in threaded connection, one or more bolt holes are formed in the length direction of the ejector rod units 31, and the ejector rod units 31 are connected with the first oil jack 11 through bolts; the length of each ejector rod unit is 50-70 cm.
The direction-adjusting centralizer 5 is coaxially arranged on the first section of ejector rod unit 31, the direction-adjusting centralizer 5 comprises a conical tip 52, the conical tip 52 and the first section of ejector rod unit 31 are detachably connected, welded or integrally formed, the conical bottom of the conical tip 52 is connected with the ejector rod unit 31, when the original pipeline 7 is blocked, the conical tip 52 can penetrate through a blocking object, the diameter of the conical tip 52 from the conical tip to the conical bottom is gradually increased, the conical surface of the conical tip 52 is beneficial to jacking and dispersing sundries in the original pipeline, the blocking object can be extruded into soil around the original pipeline 7 by the conical tip 52, and accordingly the ejector rod 3 can be always and smoothly jacked along the existing route of the original pipeline 7.
The steering centralizer 5 further comprises a steering ball 51, wherein the steering ball 51 is detachably connected, welded or integrally formed with the first section of ejector rod unit 31, a conical tip 52 is coaxially arranged with the steering ball 51, the steering ball 51 is arranged between the ejector rod unit 51 and the conical tip 52 (refer to fig. 2), and the conical tip 52 is detachably connected, welded or integrally formed with the steering ball 51; when the steering ball 51 is detachably connected with the ejector rod unit 31 and the conical tip 52 respectively, grooves matched with the surfaces of the steering ball 51 are formed in the first end of the ejector rod unit 31 and the conical bottom of the conical tip 52 respectively, connecting holes are formed in the middle of the grooves in the axial direction, connecting rods (welded or integrally formed with the steering ball) are symmetrically arranged on the steering ball 51 in the radial direction, the steering ball 51 is in threaded connection with the ejector rod unit 31 and the conical tip 52 respectively, the connection positions of the steering ball 51, the ejector rod unit 31 and the conical tip 52 are in smooth transition, and when the steering ball advances in the original pipeline 7, the dispersion performance of the steering centralizer on plugs can be improved. The diameter of the steering ball 51 is larger than the diameter of the cone bottom of the cone tip 52, when the original pipeline 7 is blocked, the cone tip 52 can pass through the blocking object, and under the action of the steering ball 51 behind the cone tip 52, the blocking object can be prevented from entering the original pipeline 7 behind the steering ball 51, and the blocking object is prevented from obstructing the push rod 3 to advance; in the jacking process of the ejector rod 3 in the original pipeline 7, the steering ball 51 can also prevent the jacking route of the ejector rod 3 from shifting, so that the ejector rod 3 can be smoothly jacked along the existing route of the original pipeline 7 all the time.
In the use process, two conical points 52 can be symmetrically arranged relative to the direction-regulating ball 51 (refer to fig. 4), the two conical points 52 and the direction-regulating ball 51 are connected into an integrated structure, in the jacking process of the ejector rod 3, the direction-regulating ball 51 and the conical points 52 can enable the ejector rod 3 to be smoothly jacked along the original pipeline 7, in the placing process of the new pipe joint 6, when the pipeline still has a barrier, the direction-regulating ball 51 and the conical points 52 can penetrate the barrier, so that the new pipe joint 6 can smoothly replace the original pipeline 7. A connecting rod 53 is coaxially arranged on the conical bottom of one conical tip 52 (or connecting rods are arranged on the conical bottoms of the two conical tips), and the connecting rod 53 is in threaded connection with the ejector rod unit or the extruding and expanding device 4. Referring to fig. 3, in the use process, two steering balls 51 can be connected through a connecting rod 53, the connecting rods 53 on the two steering balls 51 are connected in a threaded manner or are connected through a pin shaft, conical tips 52 are arranged on each steering ball 51, the steering centralizer 5 can perform a deviation rectifying and positioning function in the jacking process of the ejector rod or the jacking process of a new pipe joint, the height and position inspection times of the ejector rod and the new pipe joint can be reduced in the jacking process of the new pipe joint, and the construction efficiency is improved.
The diameter of the steering ball 51 is not smaller than the diameter of the ejector unit 31, the diameter of the ejector unit 31 varies with the diameter of the original pipe 7, and in a preferred embodiment, the ratio of the diameter of the ejector unit 31 to the diameter of the original pipe 7 is 3:4, the diameter of the ejector rod unit 31 is slightly smaller than that of the original pipeline 7, in the ejector rod jacking process, a gap between the ejector rod unit and the original pipeline is smaller, the ejector rod unit is facilitated to penetrate through an obstacle under the action of the conical tip 52, and the resistance in the ejector rod jacking or pulling-back process is reduced, so that the ejector rod jacking and the new pipe joint insertion are smoothly carried out; when encountering obstacles (such as burrs, bulges, plugs and the like in the pipe), the ejector rod can clean part of the obstacles, so that the working difficulty of the squeezing and expanding device 4 is reduced.
The extruding and expanding device 4 is of a cylindrical structure, a plurality of guiding drill blades 41 (refer to fig. 7) are circumferentially arranged on the outer wall of the extruding and expanding device 4, and in the advancing process of the extruding and expanding device 4 in the original pipeline 7, the guiding drill blades 41 can crush different parts of the original pipeline 7, so that the original pipeline 7 forms fragments, and the fragments are extruded into surrounding soil by the extruding and expanding device 4. The extruding and expanding device 4 can be of a solid structure or a hollow structure; when the squeeze-expander 4 is of a hollow structure, the inner diameter of one end of the squeeze-expander 4 is not larger than the diameter of the steering ball 51 or the conical tip 52, the inner diameter of the other end of the squeeze-expander 4 is not larger than the inner diameter of the new pipe joint 6, when the steering centralizer 5 comprises the steering ball 51 and the conical tip 52, the squeeze-expander 4 of the hollow structure can be fully contacted with the surface of the centering centralizer 5, a gap is not generated at the contact part of the squeeze-expander 4 and the steering ball 51, and in the advancing process of the squeeze-expander 4, the crushed slag can be prevented from entering the squeeze-expander; the squeezing and expanding device 4 is fully contacted with the direction-adjusting ball 51, so that the squeezing and expanding device 4 can be subjected to stable acting force in the process of placing the new pipe joint 6, and the crushing of the original pipe 7 and the smooth implementation of the process of placing the new pipe joint 6 are ensured. When the squeeze-expander 4 is of a solid structure, the squeeze-expander 4 can be abutted with the steering centralizer 5 or in threaded connection, and when in threaded connection, a connecting hole is coaxially formed in the squeeze-expander 4 and is connected with a connecting rod on the steering centralizer, the squeeze-expander 4 and the steering centralizer 5 are connected into an integrated structure, and the crushing and extrusion effects of the squeeze-expander 4 on the original pipeline 7 can be improved under the combined action of the pulling force of the ejector rod 3 and the pressure of the second oil top workbench 2. The extruding and expanding device 4 is also coaxially provided with a positioning ring 42 (refer to fig. 5), the diameter of the positioning ring 42 is matched with the inner diameter of the new pipe joint 6, the new pipe joint 6 is connected to the positioning ring 42, the new pipe joint 6 can be prevented from deviating from the movement route of the new pipe joint 6 in the jacking process of the original pipe 7, and the installation quality of the new pipe joint 6 is ensured. The outer diameter of the squeezing and expanding device 4 is larger than the inner diameter of the original pipeline 7 so as to squeeze fragments of the original pipeline into soil, and the end face of the squeezing and expanding device 4 entering the pipeline opening of the original pipeline 7 is of a wedge-shaped structure so that the squeezing and expanding device 4 smoothly enters the original pipeline 7.
The new pipe joint 6 adopts high density polyethylene pipe (HDPE pipe), the length of each new pipe joint is 50-70 cm, the length of each new pipe joint corresponds to the length of the ejector rod unit, in the application process, the pipe joints with the length of 54cm are preferably adopted, the adjacent new pipe joints 6 are connected in a socket joint and primary lock catch mode, the socket joint and primary lock catch length is 10cm, the thickness of the joint part is 1/2 of the thickness of the new pipe joint, the gap after the joint is 0.15mm, a sealing ring a (refer to fig. 6) is arranged at the connecting position of the new pipe joint 6, the sealing ring a is arranged in a sealing groove, the groove depth of the sealing groove is 3mm, the groove width is 4mm, and the sealing ring a is a rubber ring with the section diameter of 4 mm. The outer diameter of the new pipe section 7 is not smaller than the diameter of the original pipe 7, and the minimum wall thickness of the new pipe section 6 meets the requirement of SDR=DO/t, wherein SDR represents the standard size ratio of the pipe, DO represents the outer diameter (mm) of the pipe, and t represents the wall thickness (mm) of the pipe; sdr=21 when the pipe has a covering depth of not more than 5m, and sdr=17 when the pipe has a covering depth of more than 5 m; in the use process, the outer diameter of the pipeline is 300-800 mm, and the earthing depth is not less than 1.5m. The distance between the receiving well 8 and the inserting well 9 is 30-50 m.
The invention also provides a static pressure fracture pipe short pipe replacement method, referring to fig. 8, the method comprises the following steps:
and step A, enclosing an inspection well area, opening a well for ventilation, and detecting gas in the pipeline.
Step B, sewage diversion; the personnel in the well wear waterproof clothes, and the personnel in the well are provided with an oxygen supply respirator, an air bag is plugged into an upstream pipeline, and an air pump is inflated to completely isolate an upstream water source; installing a sewage pump to pump water to a downstream drain pipeline; after the sewage is pumped, the water flow groove is removed; if the sludge in the pipeline is accumulated, repeatedly flushing the original pipeline by adopting a high-pressure cleaning vehicle, and conveying the sludge in the pipeline to a dredging vehicle on the ground through a water bucket; and after the sludge is removed, removing the water flow groove, and cleaning the slag in the pipeline after removing the water flow groove.
Step C, a first oil top workbench 1 is arranged in a receiving well 8, a second oil top workbench 2 is arranged in an inserting well 9, and the first oil top workbench 1 and the second oil top workbench 2 are respectively connected with an oil path control system on the ground through oil pipes; after the connection is completed, the first oil top workbench 1 and the second oil top workbench 2 are respectively subjected to test operation, so that the first oil top 11 and the second oil top 21 are ensured to smoothly operate; in the process of installing the first oil top workbench 1 and the second oil top workbench 2, the air pick machine is adopted to level and clean the bottoms of the receiving well 8 and the inserting well 9 respectively, so that the installation stability of the first oil top workbench 1 and the second oil top workbench 2 is ensured, and the jacking rod jacking and the installation of a new pipe joint are ensured to be carried out smoothly.
When the first oil top working platform 1 is installed in the receiving well 8, determining the installation position of the first oil top working platform 1 according to the working state of the first oil top 11; when the first oil jack 11 is used for jacking the ejector rod 3, the first bearing structure 12 is arranged on a well wall opposite to a pipeline opening of the original pipeline 7, so that a bearing steel plate is attached to the well wall, and the bottom of the bearing steel plate and the bottom of the I-steel are embedded into the ground; when the first oil jack 11 is used for pulling out the ejector rod 3, the first bearing structure 12 is arranged on the well wall of the pipeline opening of the original pipeline 7; in the process of jacking or pulling out the ejector rod by the first oil jack 11, the bearing steel plate and the I-steel can uniformly transfer acting force to the wall of the receiving well, so that the first oil jack 11 can keep stability in the jacking or pulling-out process of the ejector rod. When the second oil top workbench 2 is installed in the insertion well 9, the second bearing structure 22 is installed on the well wall opposite to the pipeline opening of the original pipeline 7, so that the bearing steel plate is stuck to the well wall, and the bearing steel plate and the bottom of the I-steel are embedded into the ground.
Step D, installing the ejector rod 3 and the direction-adjusting centralizer 5, and dredging the original pipeline 7; the process comprises the following steps: coaxially arranging the steering centralizer 5 at the first end of the first section ejector rod unit 31; sequentially lowering the ejector rod units 31 into the receiving well 8, and pushing the first ejector rod unit 31 into the original pipeline 7 by the first oil jack 11 after the second end of the first ejector rod unit 31 is connected with the first oil jack 11; the first oil jack 11 is disconnected from the installed ejector rod unit 31, the first end of the next ejector rod unit 31 is connected with the installed ejector rod unit 31, the second end of the next ejector rod unit 31 is connected with the first oil jack 11, and the first oil jack 11 jacks the ejector rod unit 31 into the original pipeline 7; the foregoing steps are repeated until all the jack units 31 are jack from the receiving well 8 into the insertion well 9.
The direction-adjusting centralizer 5 can prevent the ejector rod unit 31 from generating deflection in the advancing process of the ejector rod unit 31 in the jacking process of the original pipeline 7, so that the ejector rod unit always advances along the inner wall of the original pipeline 7; the steering centralizer 5 can also reduce the resistance in the advancing process of the ejector rod unit 31, when the original pipeline 7 is seriously collapsed, deformed and blocked to prevent the ejector rod unit from advancing, the steering centralizer 5 can pass through and assist in clearing obstacles, and the resistance of the ejector rod unit in the advancing process of the original pipeline is reduced, so that the ejector rod unit 31 is smoothly advanced in the original pipeline. When the steering centralizer 5 is installed on the first section of ejector rod unit 31, the conical tip 52, the steering ball 51 and the conical tip 52 can be installed on the first section of ejector rod unit 31, and after the conical tip 52 passes through the obstacle in the original pipeline 7, the ejector rod unit 31 advances under the thrust action of the first oil jack 11, and the steering ball 51 extrudes the obstacle into surrounding soil, so that smooth advance of the ejector rod unit 31 is ensured. The diameter of the ejector rod 3 is adapted to the diameter of the original pipe 7, for example, for the rehabilitation of a pipe with a diameter of 200mm, an ejector rod unit with a diameter of 150mm is used.
And E, adjusting the installation position of the first oil top workbench 1 in the receiving well 8, reversing the first oil top 11, and enabling the bearing steel plate of the first bearing structure 12 to be tightly attached to the well wall at the pipe orifice of the original pipeline.
Step F, installing an extruding and expanding device 4 in an insertion well 9 and replacing an original pipeline 7; the replacement process of the original pipe 7 may be performed simultaneously with the pulling-out process of the ejector pin 3, or the replacement of the original pipe 7 may be performed after the ejector pin 3 pulls out the original pipe 7.
The process which can be carried out simultaneously with the pulling-out process of the ejector pin 3 when the original pipe 7 is replaced includes: installing the squeeze-expander 4 at the position of a pipeline opening of the original pipeline 7 in the insertion well 9, wherein the squeeze-expander 4 is detachably connected or abutted with the direction-adjusting centralizer 5; when the first section ejector rod unit 31 is detachably connected with the direction-adjusting centralizer 5, the squeezing and expanding device 4 is detachably connected with the direction-adjusting centralizer 5, the first oil jack 11 pulls the ejector rod 3 to move together with the direction-adjusting centralizer 5, the direction-adjusting centralizer 5 drives the squeezing and expanding device 4 to move, and in the process that the first oil jack 11 pulls the ejector rod 3, the squeezing and expanding device 4 breaks the original pipeline 7 and squeezes the original pipeline 7 into surrounding soil so as to facilitate the placement of a new pipe section 6; when the squeeze-expander 4 is abutted with the direction-adjusting centralizer 5, the second oil jack 21 pushes the squeeze-expander 4 and the new pipe joint 6 to move in the original pipe 7.
When the original pipeline 7 is replaced, after the first new pipe section 6 is connected with the extruding and expanding device 4, each time a section of ejector rod unit 31 is pulled out of the original pipeline 7 by the first oil jack 11, a section of new pipe section 6 is pushed into the original pipeline 7 by the second oil jack 21 until the original pipeline 7 is completely replaced by the new pipe section 6; the first new pipe section 6 is abutted with the direction-adjusting centralizer 5 or the first new pipe section 6 is connected to the positioning ring 42 of the direction-adjusting centralizer 5, and the adjacent new pipe sections 6 are connected through socket joint snap fasteners.
After the ejector rod 3 pulls out the original pipeline 7, the replacement process of the original pipeline 7 comprises the following steps: the ejector rods 3 are pulled back through the first oil jack 11, all ejector rod units 31 are pulled out of the receiving well 8, and obstacles in the original pipeline 7 can be further cleaned in the process of pulling back the ejector rods 3, so that the jacking of the new pipe joint 6 is ensured to be smoothly carried out; installing the swage expander 4 in the insertion well 9 at the pipe mouth position of the original pipe 7, and pushing the swage expander 4 into the original pipe 7 by the second oil roof 21 and the top plate 23; after the first new pipe joint 6 is connected with the extruding and expanding device 4, the second oil roof 21 and the top plate 23 push the new pipe joint 6 into the original pipeline 7; after the next new pipe section 6 is connected with the installed new pipe section, the second oil roof 21 and the top plate 23 push the new pipe section 6 into the original pipeline 7; the connection and pushing in of the new pipe section 6 is repeated until the original pipe 7 is completely replaced by the new pipe section 6. Before the squeeze expander 4 is installed, the direction-adjusting centralizer 5 can be installed in the original pipeline 7, and when an obstacle exists in the original pipeline 7, the direction-adjusting centralizer 5 can reduce the resistance in the replacement process of the new pipe section and ensure the smooth proceeding of the replacement process of the new pipe section 6.
Before pushing the new pipe joint 6, coating bentonite slurry on the outer wall of the new pipe joint 6 so as to reduce friction resistance in the pushing process of the new pipe joint 6; after the replacement of the original pipeline 7 is completed, if an annular part exists between the new pipeline and the soil body around the new pipeline, grouting and filling are carried out on the annular part, so that the new pipeline is tightly combined with the soil body around the new pipeline.
G, dismantling the first oil top workbench 1, the second oil top workbench 2 and repairing the inspection well; when repairing the well wall, adopting a well chamber spraying machine to carry out well chamber spraying repair, determining the spraying process and thickness according to construction requirements, and after the inspection well is repaired, adopting red bricks to build a launder in the well chamber of the inspection well, and trowelling with quick setting cement according to the gradient of the original launder so as to improve the anti-scouring and corrosion resistance of the well wall and the launder.
And step H, performing CCTV detection on the replaced pipeline, performing a water closing test on the pipeline after the detection result meets the requirement, and removing the enclosure after the test result meets the requirement.
The foregoing is a detailed description of specific embodiments of the invention and is not intended to be limiting of the invention. Various alternatives, modifications and improvements will readily occur to those skilled in the relevant art without departing from the spirit and scope of the invention.
Claims (10)
1. The static pressure split pipe short pipe replacement method is characterized by comprising the following steps of:
step A, enclosing an inspection well area, opening a well for ventilation, and detecting gas in a pipeline;
step B, sewage diversion; the air bag is plugged into an upstream pipeline, and the air pump is inflated to completely isolate an upstream water source; installing a sewage pump to pump water to a downstream drain pipeline; after the sewage is pumped, the water flow groove is removed;
Step C, a first oil top workbench (1) is arranged in a receiving well (8), a second oil top workbench (2) is arranged in an inserting well (9), and the first oil top workbench (1) and the second oil top workbench (2) are respectively connected with an oil way control system on the ground;
Step D, installing an ejector rod (3) and a direction-adjusting centralizer (5), and dredging the original pipeline (7);
e, adjusting the installation position of a first oil top workbench (1) in a receiving well (8) to enable the first oil top (11) to be reversed;
f, installing an extruding and expanding device (4) in the insertion well (9) and replacing the original pipeline (7);
G, removing the first oil top workbench (1) and the second oil top workbench (2), and repairing the inspection well;
And step H, detecting the replaced pipeline, performing a water closing test, and removing the enclosure after the test result meets the requirement.
2. The method for replacing the short pipe of the static pressure cracking pipe according to claim 1, wherein in the step C, when the first oil top working platform (1) is installed, the installation position of the first oil top working platform (1) is determined according to the working state of the first oil top (11); when the first oil jack (11) is used for jacking the ejector rod (3), the first bearing structure (12) is arranged on a well wall opposite to a pipeline opening of the original pipeline (7), so that the bearing steel plate is tightly attached to the well wall, and the bottom of the bearing steel plate and the bottom of the I-steel are embedded into the ground; when the first oil jack (11) is used for pulling out the ejector rod (3), the first bearing structure (12) is arranged on the well wall of the pipeline opening of the original pipeline (7).
3. The method of replacing a static pressure split pipe spool according to claim 1, wherein step D comprises:
Step D1, coaxially arranging a direction-adjusting centralizer (5) at the first end of the first section ejector rod unit (31);
Step D2, sequentially lowering the ejector rod units (31) into the receiving well (8), and pushing the first ejector rod units (31) into the original pipeline (7) by the first oil jack (11) after the second ends of the first ejector rod units (31) are connected with the first oil jack (11);
step D3, disconnecting the first oil jack (11) from the installed ejector rod unit (31), connecting the first end of the next ejector rod unit (31) with the installed ejector rod unit (31), connecting the second end with the first oil jack (11), and pushing the ejector rod unit (31) into the original pipeline (7) by the first oil jack (11);
and D4, repeating the step D3 until all the ejector rod units (31) are ejected into the insertion well (9) from the receiving well (8).
4. The method of replacing a static pressure split pipe spool according to claim 1, wherein step F comprises: installing the squeezing and expanding device (4) at the pipeline opening position of the original pipeline (7) in the insertion well (9), wherein the squeezing and expanding device (4) is detachably connected or abutted with the direction-adjusting centralizer (5); every time the first oil top (11) pulls out a section of ejector rod unit (31) from the original pipeline (7), the second oil top (21) pushes a section of new pipe section (6) into the original pipeline (7) until the original pipeline (7) is completely replaced by the new pipe section (6).
5. The method of replacing a static pressure split pipe spool according to claim 1, wherein step F comprises: the first oil jack (11) pulls back the ejector rods (3) and pulls all ejector rod units (31) out of the receiving well (8); installing the squeeze-expander (4) at the pipe mouth position of the original pipe (7) in the insertion well (9), and pushing the squeeze-expander (4) into the original pipe (7) by the second oil roof (21) and the top plate (23); after the first new pipe joint (6) is connected with the extruding and expanding device (4), the second oil top (21) and the top plate (23) push the new pipe joint (6) into the original pipeline (7); after the next new pipe joint (6) is connected with the installed new pipe joint, the second oil top (21) and the top plate (23) push the new pipe joint (6) into the original pipeline (7); the connection and pushing in of the new pipe section (6) is repeated until the original pipe (7) is replaced by the new pipe section (6) entirely.
6. The method for replacing the short pipe of the static pressure cracking pipe according to claim 5, wherein a direction-adjusting centralizer (5) is arranged in the original pipeline (7) before the extruding and expanding device (4) is arranged, and the direction-adjusting centralizer (5) is connected with the extruding and expanding device (4).
7. The method for replacing the static pressure split pipe short pipe according to claim 1, wherein in the step F, bentonite slurry is smeared on the outer wall of the new pipe section (6) before the new pipe section (6) is pushed into the original pipe (7) in the replacement process of the original pipe (7); and after the replacement of the original pipeline (7), if an annular part exists between the new pipeline and soil surrounding the new pipeline, grouting and filling the annular part.
8. A static pressure split pipe spool replacement method according to claim 3, characterized in that the steering centralizer (5) comprises a cone tip (52), the cone tip (52) having a cone tip diameter smaller than the cone base diameter.
9. The static pressure split pipe spool replacement method according to claim 8, characterized in that the steering centralizer (5) further comprises a steering ball (51), the steering ball (51) being arranged coaxially with the cone tip (52), the steering ball (51) being arranged between the ejector unit (31) and the cone tip (52) or the steering ball (51) being arranged between two opposing cone tips (52).
10. The static pressure split pipe nipple replacement method according to any one of claims 1 to 9, characterized in that the squeeze-expander (4) is of a solid or hollow cylindrical structure, a plurality of guide drill blades (41) are circumferentially arranged on the outer wall of the squeeze-expander (4), and a positioning ring (42) is coaxially arranged on the squeeze-expander (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410162565.3A CN117948486A (en) | 2024-02-05 | 2024-02-05 | Static pressure split pipe short pipe replacement method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410162565.3A CN117948486A (en) | 2024-02-05 | 2024-02-05 | Static pressure split pipe short pipe replacement method |
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| Publication Number | Publication Date |
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| CN117948486A true CN117948486A (en) | 2024-04-30 |
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| CN202410162565.3A Pending CN117948486A (en) | 2024-02-05 | 2024-02-05 | Static pressure split pipe short pipe replacement method |
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| Country | Link |
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| CN (1) | CN117948486A (en) |
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- 2024-02-05 CN CN202410162565.3A patent/CN117948486A/en active Pending
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