CN115306446A - Tunnel secondary lining vault grouting anti-lost grouting pipe with mold and grouting method - Google Patents
Tunnel secondary lining vault grouting anti-lost grouting pipe with mold and grouting method Download PDFInfo
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- CN115306446A CN115306446A CN202211062953.1A CN202211062953A CN115306446A CN 115306446 A CN115306446 A CN 115306446A CN 202211062953 A CN202211062953 A CN 202211062953A CN 115306446 A CN115306446 A CN 115306446A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000011440 grout Substances 0.000 claims abstract description 56
- 239000011800 void material Substances 0.000 claims abstract description 41
- 239000002002 slurry Substances 0.000 claims abstract description 23
- 238000007569 slipcasting Methods 0.000 claims description 35
- 238000007789 sealing Methods 0.000 claims description 28
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 7
- 238000010345 tape casting Methods 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 abstract description 6
- 239000004570 mortar (masonry) Substances 0.000 description 21
- 238000009434 installation Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a tunnel secondary lining vault grouting anti-empty-falling grouting pipe with a mould and a grouting method, wherein the grouting anti-empty-falling grouting pipe comprises a pipe body and a plugging air bag, a grouting pipe cavity and an exhaust overflow pipe cavity are formed in the pipe body, a plurality of grout outlets communicated with the grouting pipe cavity and a plurality of exhaust holes communicated with the exhaust overflow pipe cavity are formed in the pipe body, and the grout outlets and the exhaust holes are arranged along the length direction of the pipe body; the plugging air bag is arranged in the grouting pipe cavity and is configured to plug the grout outlet in an inflated state. Namely, a slurry outlet path and an exhaust overflow path are arranged on each segmented pipe body along the length extension direction of the pipe body, so that synchronous grouting can be realized for void spaces at different depths on the pipe body path; meanwhile, the plugging air bag is arranged in the grouting pipe cavity, so that the whole grouting pipe cavity can be plugged completely in an inflated state, and the situation that the two-lining concrete enters the grouting pipe cavity from the grout outlet to block the grouting pipe cavity and influences the conduction of the grout outlet path and the exhaust overflow path is avoided.
Description
Technical Field
The invention relates to the technical field of tunnel void-free grouting, in particular to a tunnel secondary lining vault mold-carrying grouting void-free grouting pipe and a grouting method.
Background
In the tunnel excavation process, the construction safety is ensured by supporting in time, and the tunnel excavation process is called as primary support in engineering. And after the primary support is finished, continuously reinforcing the tunnel after the primary reinforcement for the second time, wherein the tunnel is called as a 'secondary lining' in engineering. In the process of pouring the two-lining concrete, because of insufficient pumping pressure, deviation in end mold installation and the like, a void space is easily formed at the vault of the tunnel, so that the overall quality of two-lining construction is influenced, and potential safety hazards are caused.
At present, in the construction process of secondary lining of a tunnel, in order to solve the difficult problem of vault emptying, the grouting with a mold is generally adopted. And (3) installing grouting pipes along the longitudinal direction of the trolley at the central line position of the vault of the lining steel mould trolley, and timely grouting through the embedded grouting pipes to fill the vault clearance space before concrete pouring is finished and initial setting is finished. The traditional lining vault belt mold grouting technology comprises radial grouting and longitudinal grouting. In the radial grouting process, the waterproof plate is easy to be punctured by a grouting pipe, and the grouting pipe is rarely adopted in actual construction, so that longitudinal grouting is mainly adopted at present.
In the traditional longitudinal grouting process, two pipelines, one grouting pipe and one exhaust pipe are firstly pre-attached along the longitudinal direction of the tunnel. Wherein, the grouting pipe is drilled with a quincunx grout overflow hole, and the exhaust pipe is not drilled with a hole. And then, installing a grout stop valve at the pipe orifices of the two pipes and connecting the grouting pipes. And finally, grouting the in-situ mixed mortar, closing the stop valves of the exhaust pipe and the grouting pipe in sequence according to the outflow condition of the slurry of the exhaust pipe, the grouting pressure and other factors, and finishing grouting. For example, application number is CN 202021205776.4's patent application, and the technical scheme of adoption is that a device that prevention tunnel secondary lining vault was vacated is provided, including preliminary bracing, preliminary bracing's bottom is connected with the waterproof layer, the below of waterproof layer is the layer of empting, the bottom on layer of empting is connected with secondary lining, the internally mounted on layer of empting has the slip casting pipe, the bottom of slip casting pipe extends to secondary lining's bottom below, the slip casting pipe is located a plurality of slip casting holes have evenly been seted up on one section outside limit in the layer of empting inside, connecting head one is installed to the bottom of slip casting pipe, the inside on layer of empting just is located the blast pipe is installed to one side of slip casting pipe, just the bottom of blast pipe extends to secondary lining's bottom below. The adopted method is a double-pipe matched grouting and exhausting mode, two pipelines need to be pre-pasted by adopting the method, and the grouting process is complicated; meanwhile, the exhaust pipe is of a straight-through single-hole structure, the exhaust port of the exhaust pipe can only achieve the exhaust effect on the void space where the exhaust pipe is located, but for the independent void space which is not communicated with the void space where the exhaust port is located in the grouting path, gas in the independent void space cannot be exhausted well, the final grouting effect is affected, and it is difficult to guarantee that all void spaces on the grouting path are completely grouted.
In order to solve a series of defects of the traditional longitudinal grouting technology and ensure effective grouting of a tunnel vault void space, the invention provides a tunnel secondary lining vault mold-carrying grouting void-preventing grouting pipe and a grouting method.
Disclosure of Invention
In order to solve the problems of existing tunnel void grouting, the invention provides a tunnel two-lining vault grouting void-preventing grouting pipe with a mold and a grouting method, so that not only can single-pipe synchronous grouting and air exhaust be realized, but also void spaces at different depths on a pipe body path can be effectively grouted, and complete filling of all void spaces on a grouting path is ensured.
In order to solve the technical problems, the invention adopts the technical scheme that: the grouting pipe comprises a pipe body and a plugging air bag, wherein a grouting pipe cavity and an exhaust overflow pipe cavity are formed in the pipe body, a plurality of grout outlets communicated with the grouting pipe cavity and a plurality of exhaust holes communicated with the exhaust overflow pipe cavity are formed in the pipe body, and the grout outlets and the exhaust holes are arranged along the length direction of the pipe body; the plugging air bag is arranged in the grouting pipe cavity and is configured to plug the grout outlet in an inflated state.
Preferably, the grouting pipe cavity is arranged close to the lower part of the pipe body, and the grout outlet is formed in the bottom of the pipe body; the exhaust overflow pipe cavity is arranged close to the upper part of the pipe body, and the exhaust hole is formed in the top of the pipe body.
Preferably, the slurry outlet is at least provided with an arc-shaped notch extending from the bottom of the pipe body to two sides of the pipe body; the exhaust hole at least has an arc through-hole that extends the setting from body top to body both sides.
Preferably, the exhaust hole is a cross-shaped through hole, and the central point of the cross-shaped through hole is located at the highest point of the top of the section of the pipe body.
Preferably, the grouting pipe cavity and the exhaust overflow pipe cavity are separated in the pipe body through a sealing partition plate, and the sealing partition plate is an arc-shaped sealing plate protruding from the grouting pipe cavity to one side of the exhaust overflow pipe cavity.
Preferably, an air bag release port is formed in one side of the operation end of the tube body of the grouting tube cavity, and an inflation port of the plugging air bag is detachably nested in the air bag release port.
The invention also provides a tunnel secondary lining vault belt mold grouting anti-void method, which adopts the tunnel secondary lining vault belt mold grouting anti-void grouting pipe and comprises the following steps:
after primary support of the tunnel is completed and before secondary lining is started, pre-pasting a tunnel secondary lining vault mould-carrying grouting anti-drop grouting pipe along the central line of the vault of the waterproof board, and enabling an exhaust hole of the tunnel secondary lining vault mould-carrying grouting anti-drop grouting pipe to be arranged in a manner of being tightly attached to the top of the waterproof board;
filling gas into the plugging air bag to enable the expanded plugging air bag to fill the whole grouting pipe cavity, and then pouring secondary lining concrete;
before the initial setting of the two-lining concrete, the blocking air bag is deflated and is drawn out from the grouting pipe cavity, the spiral blocking cover is screwed at the air bag outlet, then grouting is carried out in the grouting pipe cavity of the grouting anti-drop grouting pipe with the mold at the arch top of the two lining of the tunnel, and when slurry flows out from the exhaust overflow port of the grouting anti-drop grouting pipe with the mold at the arch top of the two lining of the tunnel, the spiral blocking cover is screwed at the exhaust overflow port for pressure maintaining.
Preferably, the radian of the curved surface formed by the exhaust holes is greater than the radian of the vault of the waterproof board.
Preferably, a grouting valve is arranged on a grouting opening of the tunnel secondary lining vault mould-carrying grouting anti-empty grouting pipe, and the grouting valve is connected with the grouting opening in a sealing manner through an S-shaped adapter; the tunnel secondary lining vault area mould slip casting anticreep sky slip casting pipe is equipped with near slip casting mouth department and can carries out confined grout stop valve to the slip casting lumen.
Preferably, after the pressure maintaining is finished, the grout stopping valve is screwed down to prevent the backflow of grout in the grouting pipe cavity, and the grouting valve is closed to finish grouting.
The invention has the beneficial effects that:
according to the invention, the plurality of slurry outlets communicated with the grouting pipe cavity and the plurality of exhaust holes communicated with the exhaust overflow pipe cavity are formed in the length direction of the pipe body of the tunnel secondary lining arch top mould-carrying grouting anti-drop grouting pipe, the slurry outlets and the grouting pipe cavity form a slurry outlet path, and the exhaust holes and the exhaust overflow pipe cavity form an exhaust overflow path, namely, each section of pipe body along the length extension direction of the tunnel secondary lining arch top mould-carrying grouting anti-drop grouting pipe is provided with the slurry outlet path and the exhaust overflow path, so that synchronous grouting can be realized for different depths of the void spaces on the pipe body path, and all void spaces on the grouting path are completely filled. Meanwhile, the plugging air bag is arranged in the grouting pipe cavity, so that the whole grouting pipe cavity can be plugged completely in an inflated state, and the situation that the two-lining concrete enters the grouting pipe cavity from the grout outlet to block the grouting pipe cavity and influences the conduction of the grout outlet path and the exhaust overflow path is avoided.
The air exhaust hole is arranged at the top of the pipe body, so that air in the air exhaust space is completely exhausted, and the radian of the curved surface formed by the air exhaust hole is greater than that of the arch crown of the waterproof board, so that the air exhaust hole can be kept to circulate even if the air exhaust hole is arranged close to the top of the waterproof board.
The grouting and exhausting overflow loop is formed by arranging the grouting opening, the grouting pipe cavity, the grout outlet, the exhaust hole, the exhausting overflow pipe cavity and the exhausting overflow opening in sequence, so that a good flow path is provided for mortar in the process of emptying and grouting, the flowability and grouting efficiency in the process of grouting the mortar are improved, and secondary grouting of a pipeline for sealing the pipeline is avoided.
The method is realized by adopting the grouting anti-drop grouting pipe with the mold in the arch crown of the tunnel, a grouting air-discharge overflow loop formed by the grouting anti-drop grouting pipe with the mold in the arch crown of the tunnel is utilized, so that the whole grouting air-discharge overflow process is continuous and unimpeded, and meanwhile, the air exhaust hole of the grouting anti-drop grouting pipe with the mold in the arch crown of the tunnel is tightly attached to the top of the waterproof plate and is arranged at the highest point of the arch crown of the tunnel, so that the air in an empty space can be completely emptied in the grouting process; meanwhile, the characteristics that each segmented pipe body of the tunnel secondary lining arch top with mold grouting anti-disengaging grouting pipe is provided with a grout outlet path and an exhaust overflow path are utilized, and for the disengaging space which is not communicated with each other, an independent grouting exhaust overflow loop can be formed through a grout outlet and an exhaust hole which are arranged on the pipe section in the disengaging space, so that the disengaging space is filled with mortar, and the grouting quality is improved.
Drawings
Fig. 1 is an appearance schematic diagram of a tunnel secondary lining vault belt mold grouting anti-empty-out grouting pipe according to embodiment 1 of the invention.
Fig. 2 is a longitudinal sectional perspective view of a tunnel secondary lining vault grouting anti-empty-out grouting pipe with a mold according to embodiment 1 of the invention.
Fig. 3 is a schematic cross-sectional view of a tunnel secondary lining arch crown slip casting anti-drop-out slip casting pipe with a mold according to embodiment 1 of the present invention.
Fig. 4 is a top view of a tunnel secondary lining vault belt mold grouting anti-empty grouting pipe provided at the top center line of a vault waterproof plate in embodiment 2 of the invention.
Fig. 5 is a front view of a tunnel secondary lining vault with mold grouting anti-drop-out grouting pipe arranged at the top center line of a vault waterproof plate in embodiment 2 of the invention.
Fig. 6 is a schematic sectional view of a grouting valve according to embodiment 2 of the invention.
The components in the drawings are numbered as follows:
1. a pipe body; 11. grouting a pipe cavity; 12. an exhaust overflow lumen; 13. sealing the partition plate; 111. a pulp outlet; 121. an exhaust hole; 101. a grouting port; 102. an exhaust overflow port; 103. an air bag escape opening; 104. a slurry stop valve; 2. plugging the air bag; 3. a grouting valve; 31. an S-type adapter; 4. a pressure gauge; 5. mounting a fixing piece; 6. two lining end molds; 61. the second stage is lined with concrete; 62. lining with concrete; 7. a void space; 8. a waterproof sheet; 9. and (5) primary support of the tunnel.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the present invention more comprehensible to those skilled in the art, and will thus provide a clear and concise definition of the scope of the present invention.
Example 1
The embodiment 1 of the invention provides a tunnel secondary lining vault belt mould grouting anti-drop-out grouting pipe, as shown in fig. 1 to fig. 3, the tunnel secondary lining vault belt mould grouting anti-drop-out grouting pipe comprises a pipe body 1 and a plugging air bag 2, a grouting pipe cavity 11 and an exhaust overflow pipe cavity 12 are formed in the pipe body 1, a plurality of grout outlets 111 communicated with the grouting pipe cavity 11 and a plurality of exhaust holes 121 communicated with the exhaust overflow pipe cavity 12 are formed in the pipe body 1, and the grout outlets 111 and the exhaust holes 121 are arranged along the length direction of the pipe body 1; the grout outlet 111 and the grouting pipe cavity 11 form a grout outlet path, the vent hole 121 and the exhaust overflow pipe cavity 12 form an exhaust overflow path, namely, a grout outlet path and an exhaust overflow path are arranged on each segmented pipe body along the length extending direction of the pipe body 1 of the tunnel secondary lining arch with the mold for grouting and anti-drop-out grouting pipe, so that synchronous grouting can be realized for the void spaces 7 with different depths on the path of the pipe body 1, and all the void spaces 7 on the grouting path are ensured to be completely filled. The plugging air bag 2 is arranged in the grouting pipe cavity 11 and is configured for plugging the grout outlet 111 in an inflated state, the plugging air bag 2 is variable in shape, the whole grouting pipe cavity 11 can be fully plugged in the inflated state, and the grout outlet 111 is further plugged, so that the situation that the connection of the grout outlet path and the exhaust overflow path is influenced because the secondary lining concrete 62 enters the grouting pipe cavity 11 from the grout outlet 111 and is blocked is avoided.
The grouting pipe cavity 11 and the exhaust overflow pipe cavity 12 are arranged in the pipe body 1 in a sealing area way through a sealing partition plate 13, the grouting pipe cavity 11 is arranged close to the lower part of the pipe body 1, the exhaust overflow pipe cavity 12 is arranged close to the upper part of the pipe body 1, and the cross section area of the grouting pipe cavity 11 is larger than that of the exhaust overflow pipe cavity 12. As shown in fig. 2 and 3, the sealing plate 13 is an arc-shaped sealing plate protruding from the grouting tube cavity 11 to one side of the exhaust overflow tube cavity 12, the exhaust overflow tube cavity 12 after sealing is crescent, the grouting tube cavity 11 is close to a circular tube cavity, and better matching setting can be realized with the sealing airbag 2, so that the sealing airbag 2 can perform more comprehensive filling sealing on the grouting tube cavity 11 in an inflation state.
The grout outlet 111 is arranged at the bottom of the pipe body 1, grout in the grouting pipe cavity 11 flows out from the grout outlet 111, and the grout outlet 111 at least comprises an arc-shaped notch which extends from the bottom of the pipe body 1 to two sides of the pipe body 1; the exhaust hole 121 is opened at the top of the pipe body 1 for external air to enter the exhaust overflow pipe cavity 12 from the exhaust hole 121 and be discharged, and the exhaust hole 121 at least has an arc-shaped through hole extending from the top of the pipe body 1 to two sides of the pipe body 1. As shown in fig. 1 and 3, the grout outlet 111 is an arc-shaped notch which is symmetrically arranged to extend towards two sides of the pipe body 1 along the longitudinal center line of the cross section of the pipe body 1, so that grout in the grouting pipe cavity 11 can rapidly flow out at a wider range of angles. The air vent 121 is a cross-shaped through hole, and slurry is filled in the void space 7 from bottom to top, so that the center point of the cross-shaped through hole is located at the highest point of the top of the cross section of the tube body 1, and air in the void space 7 is completely evacuated. Further preferably, the radian of the curved surface formed by the vent holes 121 is greater than the radian of the vault of the waterproof board 8, so that even if the vent holes 121 are tightly attached to the top of the waterproof board 8, the circulation of air can be maintained, and the design of the cross-shaped through holes can avoid that the slurry overflows into the exhaust overflow pipe cavity 12 too early due to the large size formed in the design of the cross-shaped through holes compared with the design of the conventional round holes. As shown in fig. 1 and 2, the cross-shaped through hole is symmetrically provided with V-shaped grooves on both sides of the pipe body 1 with respect to the longitudinal center line of the cross section of the pipe body 1. The width of the opening of the grout outlet 111 is preferably 5mm when the diameter of the concrete coarse aggregate is generally 5mm or more and the particle diameter of the mortar material micro-expansive grout is generally 4.75mm or less.
As shown in fig. 1 and fig. 2, in each segmented pipe body along the length extension direction of the pipe body 1 of the tunnel secondary lining arch mould-equipped grouting anti-drop grouting pipe, each grout outlet 111 forms a grout outlet path with the grouting pipe cavity 11, so that the pipe body 1 of the tunnel secondary lining arch mould-equipped grouting anti-drop grouting pipe is provided with a plurality of grout outlet paths in a segmented manner along the length extension direction; each exhaust hole 121 and the exhaust overflow pipe cavity 12 form an exhaust overflow path, and a plurality of exhaust overflow paths are sectionally arranged on the pipe body 1 of the tunnel secondary lining arch top mould-carrying grouting anti-lost grouting pipe along the length extension direction of the pipe body, namely, each section pipe body along the length extension direction of the tunnel secondary lining arch top mould-carrying grouting anti-lost grouting pipe is provided with a slurry outlet path and an exhaust overflow path, so that synchronous grouting is performed on the void spaces 7 at different depths on the path of the pipe body 1, and all the void spaces 7 on the grouting path are completely filled; and each slurry outlet path and each exhaust overflow path are independent, and even if part of the slurry outlet 111 and the exhaust hole 121 are blocked, the conduction of other slurry outlet paths and other exhaust overflow paths is not influenced.
As shown in fig. 1 and 3, a grouting opening 101 and an exhaust overflow opening 102 are respectively arranged on one side of the grouting pipe cavity 11 and the exhaust overflow pipe cavity 12 close to the operation end of the pipe body 1, and the grouting opening 101, the grouting pipe cavity 11, the slurry outlet 111, the exhaust hole 121, the exhaust overflow pipe cavity 12 and the exhaust overflow opening 102 sequentially form a grouting exhaust overflow loop, so that a good flow path is provided for mortar in the process of emptying and grouting, the fluidity and grouting efficiency of the mortar in the process of grouting are improved, and secondary grouting of a pipeline for pipe sealing is avoided.
The utricule of shutoff gasbag 2 sets up along 11 cavity length extending direction of slip casting lumen, and its 1 operation end of relative body is equipped with an inflation inlet, and slip casting lumen 11 is equipped with gasbag takeout port 103 in 1 operation end one side of body, and the inflation inlet of shutoff gasbag 2 can be dismantled the nestification in gasbag takeout port 103, and when shutoff gasbag 2 was in the unfilled state, shutoff gasbag 2 was rectangular form setting, and the diameter is less than the diameter of gasbag takeout port 103, can take out from gasbag takeout port 103. Specifically, a nesting mode of spiral sealing can be adopted between the inflation inlet of the plugging air bag 2 and the air bag release port 103, a nesting mode of a sealing ring can also be adopted, and only the requirement of detachable sealing is met.
In addition, in order to avoid that mortar overflows from the grout outlet 111 near the grout outlet 101 during grouting to cause "false grouting" and extrusion on the second lining end mold 6, as shown in fig. 1 and 4, the outer wall of the pipe body 1 at one end of the tunnel second lining vault mold-carrying grouting anti-empty grouting pipe near the grout outlet 101 is hermetically arranged. Preferably, the length of the pipe body 1 arranged on the outer wall in a sealing mode is one fourth of the length of the whole pipe body 1 of the tunnel secondary lining arch crown tape mold grouting anti-empty grouting pipe.
According to the tunnel secondary lining vault belt mold grouting anti-lost grouting pipe disclosed by the embodiment 1 of the invention, the sealing partition plate 13 is arranged in the pipe body 1 to divide the internal space of the pipe body 1 into the upper exhaust overflow pipe cavity 12 and the lower grouting pipe cavity 11, so that the combination of grouting and exhaust on a single pipe is realized, and the slurry outlet 111 communicated with the grouting pipe cavity 11 and the exhaust hole 121 communicated with the exhaust overflow pipe cavity 12 are arranged on each segmented pipe body to form a slurry outlet path and an exhaust overflow path, so that each segmented pipe body of the tunnel secondary lining vault belt mold grouting anti-lost grouting pipe is provided with the slurry outlet path and the exhaust overflow path, and the synchronous grouting is realized for the evacuated spaces 7 with different depths in the path of the pipe body 1, the space occupied by the grouting pipe body 1 is reduced, the installation work of the pipe body 1 is simplified, and the grouting efficiency is improved.
Example 2
The embodiment 2 of the invention provides a tunnel secondary lining arch top mold-carrying grouting anti-void method, which is realized by adopting a tunnel secondary lining arch top mold-carrying grouting anti-void grouting pipe in the embodiment 1, and comprises the following steps:
s1, after the primary tunnel support 9 is completed and before secondary lining begins, pre-pasting a tunnel secondary lining vault mould-carrying grouting anti-drop hollow grouting pipe along the central line of a vault of a waterproof board 8, and enabling an exhaust hole 121 of the tunnel secondary lining vault mould-carrying grouting anti-drop hollow grouting pipe to be tightly attached to the top of the waterproof board 8.
As shown in fig. 4 and 5, the air in the void space 7 can be completely evacuated in the grouting process by arranging the grouting anti-void grouting pipe with the mold at the top center line of the waterproof plate 8 and arranging the exhaust hole 121 of the grouting anti-void grouting pipe with the mold at the top of the tunnel at the highest point of the vault of the secondary lining. As shown in fig. 4, when the anti-drop grouting pipe for grouting with a mold in the tunnel secondary lining vault is pre-attached, one sealed end of the anti-drop grouting pipe for grouting with a mold in the tunnel secondary lining vault is abutted against the concrete 61 in the upper stage.
The grouting opening 101 of the tunnel secondary lining vault area mould slip casting anticreep hollow grouting pipe is provided with a slip casting valve 3, and the tunnel secondary lining vault area mould slip casting anticreep hollow grouting pipe is provided with a grout stop valve 104 which can seal a slip casting pipe cavity 11 near the slip casting opening 101. Because the two lining vault area mould slip casting anticreep empty slip casting pipes in tunnel install on two lining vaults after, the clearance between its and the vault is less, and the follow-up slip casting operation of being not convenient for, consequently as shown in fig. 5 and fig. 6, slip casting valve 3 is through an S type adapter 31 and slip casting mouth 101 sealing connection, and preferably, the one end that S type adapter 31 and slip casting valve 3 are connected sets up in body 1 below relative to the exhaust hole 121 of two lining vault area mould slip casting anticreep empty slip casting pipes in tunnel. The setting of S type adapter 31 can increase the interval between slip casting valve 3 and the vault, and then increases slip casting valve 3' S operating space, the slip casting operation in the later stage of being convenient for. Preferably, the grouting valve 3 and the S-shaped adapter 31 may be pre-installed on the grouting anti-drop grouting pipe with the mold at the vault of the tunnel, and then pre-attached to the top of the waterproof board 8 with the grouting anti-drop grouting pipe with the mold at the vault of the tunnel. The grout stop valve 104 can seal the grouting pipe cavity 11 after grouting and pressure maintaining are completed, so that a worker can disassemble a grout conveying pipeline from a grouting machine to the grouting port 101, including the grouting valve 3, in time clean the grouting pipeline, and the problem that grouting liquid flows back from the grouting port 101 after the grouting pipeline is disassembled is solved.
As shown in fig. 4 and 5, the tunnel secondary lining vault formwork grouting anti-drop hollow grouting pipe is arranged at the top of the waterproof board 8 through the installation fixing piece 5, in the process of installing the tunnel secondary lining vault formwork grouting anti-drop hollow grouting pipe, if bolt fastening installation is carried out by adopting common metal fixing pieces, a bolt can penetrate through the waterproof board 8 to destroy the waterproof performance of the waterproof board 8, so that the problem that the waterproof board 8 is destroyed by the installation fixing piece 5 is avoided, the installation fixing piece 5 made of the material which is the same as that of the waterproof board 8 is preferably adopted, the installation fixing piece 5 is connected with the waterproof board 8 through hot-melt welding, and the integrity of the waterproof board 8 is ensured to the maximum extent.
S2, filling gas into the plugging air bag 2 to enable the expanded plugging air bag 2 to fill the whole grouting pipe cavity 11, and then pouring secondary lining concrete 62.
S3, before the secondary lining concrete 62 is initially set, the blocking air bag 2 is deflated and is drawn out from the grouting pipe cavity 11, the spiral blocking cover is screwed at the air bag outlet 103, grouting is carried out in the grouting pipe cavity 11 of the tunnel secondary lining vault belt-mold grouting anti-drop-off grouting pipe, and when slurry flows out of the exhaust overflow port 102 of the tunnel secondary lining vault belt-mold grouting anti-drop-off grouting pipe, the spiral blocking cover is screwed at the exhaust overflow port 102 for pressure maintaining.
Specifically, before the secondary lining concrete 62 is initially set, the plugging air bag 2 is firstly deflated and is drawn out from the grouting pipe cavity 11, and the air bag escape port 103 is plugged; and then grouting into a grouting pipe cavity 11 of the tunnel secondary lining arch-shaped mould grouting anti-void grouting pipe, wherein mortar synchronously flows into each void space 7 through a mortar outlet 111 arranged in the length extension direction of the pipe body 1, gas in the void spaces 7 is discharged into an exhaust overflow pipe cavity 12 through an exhaust hole 121 and is discharged from an exhaust overflow port 102, after the void spaces 7 are filled with the mortar, the mortar enters the exhaust overflow pipe cavity 12 from the exhaust hole 121, the exhaust overflow pipe cavity 12 is filled until the mortar overflows from the exhaust overflow port 102, and a spiral plugging cover is screwed at the exhaust overflow port 102 for pressure maintaining.
In the whole grouting process, mortar sequentially passes through the grouting opening 101, the grouting pipe cavity 11, the slurry outlet 111, the exhaust hole 121, the exhaust overflow pipe cavity 12 and the exhaust overflow opening 102 to form a grouting exhaust overflow loop, the whole grouting exhaust overflow process is continuous and unimpeded, a good flow path is provided for the mortar in the void grouting process, the fluidity and the grouting efficiency in the mortar grouting process are improved, meanwhile, the mortar overflows from the exhaust hole 121 to enter the exhaust overflow pipe cavity 12 for filling after the void space 7 is filled, and secondary grouting of a pipeline for pipe sealing is avoided.
Because each segmented pipe body of the tunnel secondary lining arch core grouting anti-falling grouting pipe with the mould is provided with the grout outlet path and the air exhaust overflow path, even if the mutually disconnected void space 7 exists, the grout outlet 111 and the air exhaust hole 121 arranged on the pipe section in the void space 7 can form an independent grouting air exhaust overflow loop, so that the void space 7 is filled with the mortar, and the grouting quality is improved.
A pressure gauge 4 is arranged on one side of the grouting valve 3, which faces the grouting port 101, and whether grouting with a mold for preventing vault from being empty can be judged according to pressure parameters detected by the pressure gauge 4; the judgment can also be carried out according to whether the pressure maintaining time is enough, and the pressure maintaining time is preferably 10min; or by checking whether the slurry seeps out of the gap at the two lining end dies 6. The specific judgment standard can be determined by actual construction. Preferably, as shown in fig. 6, the pressure gauge 4 is disposed on the grouting valve 3, and the sensing end of the pressure gauge extends into the grouting valve 3 and is disposed near the side of the grouting valve 3 connected to the grouting port 101.
The invention embodiment 2 discloses a tunnel secondary lining vault die-casting anti-void method, which utilizes a grouting air-discharging overflow loop formed by a tunnel secondary lining vault die-casting anti-void grouting pipe per se to ensure that the whole grouting air-discharging overflow process is continuous and unimpeded. Because the exhaust hole 121 of the tunnel secondary lining vault with the mould grouting anti-empty grouting pipe is tightly attached to the top of the waterproof plate 8 and arranged at the highest point of the secondary lining vault, the air in the empty space 7 can be completely emptied in the grouting process; by utilizing the characteristics that each segmented pipe body of the tunnel secondary lining arch-shaped grouting anti-cavitation grouting pipe with the mould has a grouting path and an exhaust overflow path, for the mutually disconnected cavitation space 7, an independent grouting exhaust overflow loop can be formed through a grout outlet 111 and an exhaust hole 121 which are arranged on the pipe section in the cavitation space 7, so that the cavitation space 7 is filled with mortar; meanwhile, after the void space 7 is filled with mortar, the mortar overflows from the exhaust holes 121 and enters the exhaust overflow pipe cavity 12 for backfilling, so that secondary grouting of the pipeline for pipe sealing is avoided, grouting operation is facilitated, grouting effect is guaranteed, and grouting quality is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A tunnel secondary lining vault grouting anti-empty-falling grouting pipe with a mould is characterized by comprising a pipe body and a plugging air bag, wherein a grouting pipe cavity and an exhaust overflow pipe cavity are formed in the pipe body, a plurality of grout outlets communicated with the grouting pipe cavity and a plurality of exhaust holes communicated with the exhaust overflow pipe cavity are formed in the pipe body, and the grout outlets and the exhaust holes are arranged along the length direction of the pipe body; the blocking air bag is arranged in the grouting pipe cavity and is configured to block the grout outlet in an inflated state.
2. The tunnel secondary lining vault area mould slip casting anti-drop-out grouting pipe of claim 1, characterized by that, the said grouting lumen is set up close to the lower part of the tube body, the said grout outlet is opened in the bottom of the tube body; the exhaust overflow pipe cavity is arranged close to the upper part of the pipe body, and the exhaust hole is formed in the top of the pipe body.
3. The tunnel secondary lining vault grouting anti-drop-out grouting pipe with the mold as claimed in claim 1, wherein the grout outlet is provided with at least one arc-shaped notch extending from the bottom of the pipe body to two sides of the pipe body; the exhaust hole at least has an arc through-hole that extends the setting from body top to body both sides.
4. The tunnel secondary lining vault grouting anti-empty-falling grouting pipe with the mold as claimed in claim 1, wherein the exhaust holes are cross-shaped through holes, and the central points of the cross-shaped through holes are located at the highest point of the top of the cross section of the pipe body.
5. The tunnel secondary lining vault grouting anti-drop-out grouting pipe with the mold as claimed in claim 1, wherein the grouting pipe cavity and the exhaust overflow pipe cavity are separated in a sealing area in the pipe body through a sealing partition plate, and the sealing partition plate is an arc-shaped sealing plate protruding from the grouting pipe cavity to one side of the exhaust overflow pipe cavity.
6. The grouting pipe with the tunnel secondary lining and the arch top provided with the mold and capable of preventing the air loss in the grouting process according to claim 1, wherein an air bag release port is formed in one side of the operation end of the pipe body of the grouting pipe cavity, and an inflation port of the blocking air bag is detachably nested in the air bag release port.
7. A tunnel secondary lining vault belt mold grouting anti-void method is characterized in that the tunnel secondary lining vault belt mold grouting anti-void grouting pipe of any claim 1 to claim 6 is adopted, and the method comprises the following steps:
after primary support of the tunnel is completed and before secondary lining is started, pre-pasting a tunnel secondary lining vault mould-carrying grouting anti-drop grouting pipe along the central line of the vault of the waterproof board, and enabling an exhaust hole of the tunnel secondary lining vault mould-carrying grouting anti-drop grouting pipe to be arranged in a manner of being tightly attached to the top of the waterproof board;
filling gas into the plugging air bag to enable the expanded plugging air bag to fill the whole grouting pipe cavity, and then pouring secondary lining concrete;
before the initial setting of the two-lining concrete, the plugging air bag is deflated and is drawn out from the grouting pipe cavity, the spiral plugging cover is screwed at the air bag escape port, then grouting is carried out in the grouting pipe cavity of the grouting anti-drop grouting pipe with the mould at the vault of the two-lining vault, and when slurry flows out from the exhaust overflow port of the grouting anti-drop grouting pipe with the mould at the vault of the two-lining vault, the spiral plugging cover is screwed at the exhaust overflow port for pressure maintaining.
8. The method for preventing the tunnel secondary lining vault from being emptied by the mold grouting of the tunnel secondary lining vault of claim 7, wherein the radian of the curved surface formed by the air exhaust holes is greater than the radian of the vault of the waterproof plate.
9. The method for preventing the tunnel secondary lining vault from being separated from the air by grouting with the mould according to claim 7, wherein a grouting valve is arranged on a grouting opening of the grouting pipe for preventing the tunnel secondary lining vault from being separated from the air by grouting, and the grouting valve is connected with the grouting opening in a sealing manner through an S-shaped adapter; the tunnel secondary lining vault area mould slip casting anticreep sky slip casting pipe is equipped with near slip casting mouth department and can carries out confined grout stop valve to the slip casting lumen.
10. The method for preventing the tunnel secondary lining vault from being emptied by the tape casting according to claim 9, wherein after the pressure maintaining is finished, the grout stopping valve is screwed down to prevent the grout in the grouting pipe cavity from flowing back, and the grouting valve is closed to finish the grouting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211062953.1A CN115306446A (en) | 2022-08-31 | 2022-08-31 | Tunnel secondary lining vault grouting anti-lost grouting pipe with mold and grouting method |
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| CN202211062953.1A CN115306446A (en) | 2022-08-31 | 2022-08-31 | Tunnel secondary lining vault grouting anti-lost grouting pipe with mold and grouting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116104541A (en) * | 2023-04-13 | 2023-05-12 | 华北有色工程勘察院有限公司 | Grouting pipe for well grouting |
| CN117386143A (en) * | 2023-09-25 | 2024-01-12 | 广东聚源建设集团有限公司 | Device and method for constructing concrete construction joint by interval type automatic closing waterproof grouting |
-
2022
- 2022-08-31 CN CN202211062953.1A patent/CN115306446A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116104541A (en) * | 2023-04-13 | 2023-05-12 | 华北有色工程勘察院有限公司 | Grouting pipe for well grouting |
| CN116104541B (en) * | 2023-04-13 | 2023-06-13 | 华北有色工程勘察院有限公司 | Grouting pipe for well grouting |
| CN117386143A (en) * | 2023-09-25 | 2024-01-12 | 广东聚源建设集团有限公司 | Device and method for constructing concrete construction joint by interval type automatic closing waterproof grouting |
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