CN114961773A - Tunnel lining structure reinforcing method - Google Patents
Tunnel lining structure reinforcing method Download PDFInfo
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- CN114961773A CN114961773A CN202210233018.0A CN202210233018A CN114961773A CN 114961773 A CN114961773 A CN 114961773A CN 202210233018 A CN202210233018 A CN 202210233018A CN 114961773 A CN114961773 A CN 114961773A
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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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/26—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by impact tools, e.g. by chisels or other tools having a cutting edge
- B28D1/265—Scabbling machines or scabbling tools
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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
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- 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
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
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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
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/086—Methods of making concrete lining segments
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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
-
- 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
-
- 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
- E21D11/385—Sealing means positioned between adjacent lining members
-
- 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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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Geology (AREA)
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- Lining And Supports For Tunnels (AREA)
Abstract
The invention belongs to the technical field of tunnel lining reinforcement, and discloses a tunnel lining structure reinforcement method, which is used for solving the problems in the existing tunnel lining structure reinforcement technology. The invention has the advantages of small influence on traffic and transportation during construction, reasonable step design, quick construction, high safety, obviously improved rigidity, bearing capacity and durability of the reinforced lining structure, no invasion to the limit of tunnel buildings and good economy. The invention has no processes of binding steel bars, pouring concrete, preserving health and the like, and only needs processes of splicing, connecting, filling with grouting material and the like, thereby greatly shortening the field construction time and ensuring the construction quality. Compared with the prior art of reinforcement, the invention also has the advantage of high economy.
Description
Technical Field
The invention relates to the technical field of tunnel lining reinforcement, in particular to a method for reinforcing a tunnel lining structure.
Background
At present, the total mileage of highway tunnels operated in China breaks through 21999.3km, the total mileage of railway tunnels operated in China also breaks through 19630km, and the total mileage of subway lines operated in China reaches 6280.8 km. With the increase of the operation time, the defects of the operation tunnel are gradually increased, the driving safety is influenced, the problem of tunnel maintenance and reinforcement is increasingly prominent, but the existing tunnel maintenance and reinforcement technology cannot meet the actual requirements. The tunnel structure is maintained and reinforced during the use period, the tunnel damage is prevented from developing, the performance index of the original structure is even improved, the tunnel structure can be guaranteed to have good operation conditions and use functions, and the service life of the structure is continuously prolonged.
The tunnel lining structure is reinforced by adopting an arch-changing reinforcing method. The arch-changing reinforcing method comprises integral arch-changing reinforcing and local arch-changing reinforcing. The reinforcing effect after the integral arch replacement reinforcement is better, but the problems of high manufacturing cost, long construction period, need of traffic interruption, high risk during the construction of dismantling the existing lining structure and the like exist. The local arch-changing reinforcement also has the same problem as the integral arch-changing reinforcement, and the local arch-changing reinforcement also has the problem of poor quality of interface connection between the existing structure and the newly-added structure.
For the reinforcement of a tunnel lining structure, most of the prior art needs to carry out closed construction on the whole tunnel of the tunnel, so that traffic is seriously influenced, people complain about sound load channels, the social public opinion pressure of a management and maintenance unit is very high, but if a damaged structure is not reinforced, the tunnel structure works with diseases, and traffic safety is seriously influenced. Some prior art can achieve uninterrupted traffic, but the construction safety is poor (casualties often occur in maintenance and repair engineering), the environmental impact is large (large noise and large dust), and the effect after reinforcement is poor. Therefore, the invention is needed to invent a tunnel lining structure reinforcing method which has strong practicability and does not interrupt traffic.
Disclosure of Invention
The invention aims to solve the problems in the prior art of reinforcing a tunnel lining structure and provides a method for reinforcing the tunnel lining structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for reinforcing a tunnel lining structure comprises the following steps:
step 11, grouting and filling the wall footer, the joint and the wall after the wall, the joint and the gap between the two ends of the prefabricated part along the tunnel direction and the existing lining by adopting edge sealing glue or a template, reserving a grouting hole and an air outlet, and then grouting the wall footer and the grouting hole reserved at each longitudinal joint in sequence from bottom to top until the gap between the prefabricated part and the existing lining, the joint between two adjacent prefabricated parts and the base position of the wall footer are filled and compacted by grouting materials;
12, repeating the steps 3-11 to finish the reinforcing construction of the lining structure on one side of the closed lane;
and step 13, exchanging the closed lane and the passing lane of the tunnel, and then repeating the steps 3-11 to finish the reinforcing construction of the lining structure on the other side.
Further, the sectional shape of the prefabricated part in the step 1 can be any shape such as rectangular, box-shaped, groove-shaped, wave-shaped, T-shaped, I-shaped and the like.
Further, when the prefabricated parts are produced in the step 2, embedded parts or reserved reinforcing meshes can be arranged at the ends of the prefabricated parts along the longitudinal direction of the tunnel, and are used for connecting the prefabricated parts adjacent to the longitudinal direction.
Furthermore, when the prefabricated components are produced in the step 2, a reinforcing mesh can be arranged in the prefabricated components, if the reinforcing mesh is a steel bar welding mesh, the end part of the welding mesh extends out of the prefabricated components so as to be welded with the adjacent prefabricated components, an embedded part does not need to be arranged at the end of each prefabricated component, and in the step 9, the two adjacent prefabricated components are connected through the reserved steel bar welding mesh.
Further, in step 2, when the hole for installing the first connecting member is reserved, if the existing structure is a reinforced concrete structure, the distribution condition of the steel bars should be detected by a steel bar detector in advance, and then the hole positions should be moved appropriately.
Further, in step 4, during calibration, the position of the reserved hole channel drawn on the prefabricated part is covered by transparent paper or a positioning plate, then the prefabricated part is covered on the surface of the existing structure for calibration, and the hole position for installing the second connecting piece is calibrated by the same method.
Furthermore, the first connecting piece, the second connecting piece, the third connecting piece and the fourth connecting piece can be mechanical anchor bolts, chemical anchor bolts or embedded bars; when the first connecting piece, the second connecting piece, the third connecting piece and the fourth connecting piece are chemical anchor bolts or embedded bars, glue injection is performed in the drill holes before the first connecting piece, the second connecting piece, the third connecting piece and the fourth connecting piece are installed.
Furthermore, the first connecting piece consists of a first connecting rod, a first nut and a first tray; the second connecting piece comprises second connecting rod, second nut and second tray.
Further, performing half-width closed construction and half-width traffic control on the tunnel in the step 3, then starting base surface treatment, removing degraded parts and attachments from the closed side structure, namely the surface from the vault to the basement position in the reinforced section during treatment, and then performing chiseling treatment on the surface of the existing concrete structure; in step 8, the prefabricated part at the vault position can be installed during construction on the side, and a cantilever type maintenance platform needs to be matched at the moment; can also be installed when constructing on the other side; and after the construction of both sides is finished, the tunnel can be closed in a short time and then the vault prefabricated part is installed.
Further, in the step 3, the tunnel is constructed in a full-width closed manner, and in the step 8, the prefabricated parts are assembled in any one of the sequence of installation from the vault to the side walls on two sides, installation from the side walls on two sides to the vault, and installation from one side wall to the other side wall in a clockwise or anticlockwise direction.
Further, determining an annular reinforcement range according to the damage condition and designing the shape and size of the prefabricated part in the steps 1 and 2; and 3, performing local reinforcing construction on the tunnel, and grooving the existing lining at the installation position of the enlarged end part of the prefabricated part, wherein the grooving depth and width are matched with the enlarged end part of the prefabricated part.
Compared with the prior art, the invention has the following beneficial effects:
the method for reinforcing the tunnel lining structure produces the prefabricated parts in a factory, and the prefabricated parts are preferably made of ultra-high performance concrete. Compared with two reinforcing methods of pasting fiber composite materials or steel plates, the invention can obviously improve the compression resistance, bending resistance, shear rigidity and bearing capacity of the lining structure, and can not generate the phenomena of peeling between fibers or steel plates and concrete and buckling deformation of the steel plates; compared with the sprayed concrete reinforcement technology, the method does not generate dust in the construction process, has small influence on the tunnel environment, and has smooth surface, uniform thickness and high durability after reinforcement; compared with the steel frame embedded reinforcement technology, the invention has little damage to the existing lining structure and high construction safety; compared with the anchor rod (cable) reinforcing technology, the invention can not damage the waterproof layer to cause new water leakage diseases; compared with the arch sheathing reinforcement technology, the arch sheathing reinforcement technology has the advantages that the thickness is smaller, the arch sheathing reinforcement technology does not invade the tunnel building clearance, the influence on traffic transportation is small, construction procedures such as steel bar binding, concrete pouring, health maintenance and the like are not needed, only construction procedures such as assembling, connecting, grouting material filling and the like are needed, the field construction time is greatly shortened, and the construction quality is ensured. Compared with the prior art of reinforcement, the invention also has the advantage of high economy.
The grouting material filling layer is arranged between the prefabricated part and the tunnel lining, so that the prefabricated part and the tunnel lining can be bonded together to form a superposed lining, and the superposed lining and the prefabricated part and the tunnel lining are stressed and deformed together to resist external load.
The invention has the following advantages in social benefit: the structural reform and the industrialized development of the supply side of the industry are promoted, the resource and energy are saved, the construction pollution is reduced, the labor production efficiency and the quality level are improved, the industrialization and transformation upgrade of the civil engineering industry are promoted, new kinetic energy of a new industry is cultivated, and the surplus productivity of chemical solution is promoted.
The invention has the following advantages in economic benefit: the cost of the prior art of reinforcing by sticking a steel plate is 1.3-1.5 ten thousand yuan per linear meter, and the cost of the profile steel sprayed concrete bushing is 1.8-2.0 ten thousand yuan per linear meter, while the cost of the invention is 1.1-1.3 ten thousand yuan per linear meter, which is about 15% lower than the reinforcing method by sticking a steel plate and about 40% lower than the cost of the profile steel sprayed concrete bushing.
According to the consideration of the whole life cycle of the tunnel, the method is expected to be adopted to reinforce twice in the service period of the tunnel with the design life of 100 years, while the traditional reinforcing method needs to reinforce 4-6 times, so that the method saves the maintenance and reinforcement cost by 50-60%.
The advantages of the invention in terms of technical benefits are: according to theoretical calculation, tests and numerical simulation, the minimum safety factor of the reinforced tunnel structure by adopting the 6mm steel plate is 4.56, while the minimum safety factor of the reinforced tunnel structure by adopting the invention is 6.19, which improves the minimum safety factor by about 30-40%.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of circumferential blocks of the prefabricated part according to the present invention.
Fig. 3 is a partially enlarged view of a portion a in fig. 1.
Fig. 4 is a partially enlarged view of a portion B in fig. 1.
Fig. 5 is a partially enlarged view of C in fig. 1.
Fig. 6 is a schematic diagram illustrating the overlapping of the welded mesh of the reinforcing bars at the joints between the adjacent prefabricated parts according to the present invention.
Fig. 7 is a schematic structural diagram of a first connecting member according to the present invention.
Fig. 8 is a three-view diagram of the structure of the special baffle plate of the invention.
FIG. 9 is a schematic view of a reinforcing mesh arrangement according to the present invention.
Fig. 10-15 are schematic diagrams of the assembly of prefabricated parts according to the invention.
Figures 16-20 are schematic views of the present invention for the partial reinforcement of tunnel lining structures.
Fig. 21 is a partially enlarged view of fig. 16 at D.
FIG. 22 is a graph of the minimum safety factor of a prior art steel plate reinforcing structure.
FIG. 23 is a graph of the minimum security factor of the reinforcing structure of the present invention.
FIG. 24 is a flow chart of an embodiment of the present invention.
FIG. 25 is a flow chart of another embodiment of the present invention.
Fig. 26-27 are schematic structural views of the present invention for railway tunnel lining reinforcement.
Fig. 28 is a schematic structural view of the shield tunnel lining reinforcement of the present invention.
The reference numerals have the following meanings: 1. prefabricating a component; 2. a first connecting member; 21. a first connecting rod; 22. a first nut; 23. a first tray; 3. reinforcing the mesh sheet; 4. a special baffle plate; 41. shear nails; 5. a second connecting member; 51. a second connecting rod; 52. a second nut; 53. a second tray; 6. a seam filler; 7. grouting material filling layer; 8. a third connecting member; 9. a fourth connecting member; 10. basement obturator.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Example 1:
as shown in fig. 1-15 and fig. 24, the tunnel is subjected to half-width closed construction and half-width traffic control without interrupting traffic.
The method for reinforcing the tunnel lining structure without interrupting traffic comprises the following steps:
The prefabricated parts 1 are preferably divided into odd blocks (3, 5, 7, 9, etc.) and even blocks, the prefabricated parts 1 of the left and right side wall feet are non-standard blocks, and the other prefabricated parts 1 are preferably standard blocks with equal arc length. The thickness t of the prefabricated element 1 should be determined according to the required bearing capacity and the tunnel building boundary. The width B of the prefabricated part 1 should be determined according to the capacity of the erection equipment.
The arc length of the prefabricated part 1 is not more than 4.5 m; the thickness is preferably more than 2cm and less than 40 cm; the width is preferably greater than 0.5m and less than 3 m.
In this embodiment 1, the prefabricated member 1 has a rectangular solid plate section. The prefabricated part 1 is divided into 7 blocks, the prefabricated parts of the left and right side skirts are nonstandard blocks, and the rest 5 prefabricated parts adopt standard blocks with the arc length of 3 m. The thickness t of the prefabricated part 1 is taken to be 10cm and the width B of the prefabricated part 1 is taken to be 2 m.
The preformed hole channels can also be arranged in a rectangular mode or a straight mode. (see, e.g., FIGS. 12-15)
If the existing structure is a reinforced concrete structure, the distribution condition of the steel bars should be ascertained by a steel bar detector in advance, and then the hole sites are moved properly.
And 4, calibrating the installation position of the prefabricated part 1 and the position corresponding to the reserved hole channel for installing the first connecting piece 2 on the surface of the existing tunnel lining structure. The position of a reserved hole is drawn on the prefabricated part 1 by covering the prefabricated part with transparent paper for calibration, and then the prefabricated part is covered on the surface of the existing structure for calibration; the hole sites for mounting the second connectors 5 are marked in the same way.
And 5, drilling and cleaning holes at the installation positions of the first connecting piece 2 and the second connecting piece 5 on the surface of the existing structure.
In this embodiment, the third connecting member 8 and the fourth connecting member 9 are steel bar-embedded. The third connecting element 8 and the fourth connecting element 9 can also be chemical anchors.
The third connecting piece 8 and the fourth connecting piece 9 can also adopt a mechanical anchor bolt, and when the mechanical anchor bolt is adopted, glue injection is not needed before the third connecting piece 8 and the fourth connecting piece 9 are installed.
The first connecting member 2 is composed of a first connecting rod 21, a first nut 22, and a first tray 23. The first tray 23 may be a rectangular, circular, butterfly tray. The first tray 23 may not be provided. The first connecting rod 21 may be made of a metal or non-metal material. If the first connecting member 2 is a bar-planting or chemical anchor bolt, glue should be injected first and then the first connecting member 2 is installed.
In this embodiment, the first tray 23 is a butterfly tray, and the first connecting member 2 is a mechanical anchor bolt.
And 8, repeating the step 7, and finishing the installation of the five prefabricated parts 1 (each width is 2m, namely the total width is 10 m) according to the installation sequence from the side wall feet to the vault.
The second connecting member 5 may be a mechanical anchor, a chemical anchor, a rebar, etc. The second connector 5 is composed of a second connecting rod 51, a second nut 52, and a second tray 53. The second tray 53 may be a rectangular, circular, butterfly tray. The second tray 53 may not be provided. The second connecting rod 51 may be made of a metal or non-metal material. If the second connecting member 5 is a bar-planting or chemical anchor bolt, glue should be injected first, and then the second connecting member 5 is installed.
In this embodiment, the second connecting member 5 is made of steel bars. When the special baffle 4 is installed, glue is injected firstly, then the second connecting piece 5 is planted, and finally the special baffle is fixed at a preset position of the existing structure through the second connecting piece 5 (comprising the second connecting rod 51, the second nut 52 and the butterfly-shaped tray 53).
Step 11, wall base, joint and grouting and filling behind the wall: adopting edge sealing glue or a template to block gaps between the two ends of the basement, the joint and the prefabricated part 1 along the tunnel direction and the existing lining and reserving grouting holes and air outlets, then pressing and injecting grouting materials in the grouting holes reserved at the basement, the first joint, the second joint and the third joint according to the sequence from bottom to top until the gaps between the prefabricated part 1 and the existing lining (a grouting material filling layer 7), the joints between two adjacent prefabricated parts 1 (a joint filling body 6), a basement of the basement (a basement of the basement (a basement of the basement 10) and the like are filled with the grouting materials to be compact, and the grouting materials can adopt inorganic or organic grouting materials.
In this embodiment, the grouting material is a high-strength non-shrinkage grouting material.
And 12, repeating the steps 3-11 to finish the reinforcing construction of the side lining structure. (if the side prefabricated parts are installed at one time and filled by grouting, the step is not needed)
In the steps 3-11, all the prefabricated parts 1 in the reinforcing section on the side can be installed first, and finally synchronous grouting is carried out; one or more prefabricated parts 1 on the side can be installed, and then grouting filling is carried out until the lining structure on the side in the reinforced section is reinforced.
And step 13, exchanging the closed lane and the passing lane of the tunnel, and then repeating the steps 3-11 to finish the reinforcing construction of the lining structure on the other side.
When the installation of the dome-position prefabricated part 1 (capping block) is not performed at the time of single construction, step 14 is added: and (4) closing the tunnel in a whole tunnel in a short time (the time period with small traffic flow can be selected), and repeating the steps 3-11 to finish the reinforcing construction of the arch crown position lining structure.
Example 2:
in this embodiment, the tunnel is constructed in a closed manner, and the construction flow chart is shown in fig. 25.
The other steps are the same as those in example 1 except for step 3, step 6, step 8 and step 12.
And 6, chiseling concrete structures of the left side wall footing portion and the right side wall footing portion, drilling holes in the mounting positions of the third connecting piece 8 and the fourth connecting piece 9, cleaning the holes, injecting glue, and finally mounting the third connecting piece 8 and the fourth connecting piece 9.
And 8, repeating the step 7 in the embodiment 1, wherein the prefabricated part 1 is assembled in any one of the sequence of installation from the vault to the side walls on two sides, installation from the side walls on two sides to the vault, and installation from one side wall to the other side wall in the clockwise or anticlockwise direction, so that the installation of the prefabricated part 1 in one ring is completed.
And 12, repeating the steps 3-11 to finish the installation of the next ring of prefabricated parts until all the reinforcing sections are constructed.
Example 3:
as shown in fig. 16-21, the tunnel lining is partially reinforced in this embodiment.
The procedure of this example is the same as that of example 1, except that:
and step 1 and step 2 are to determine the circumferential reinforcement range according to the actual condition of the tunnel defect and design the shape and size of the prefabricated part 1. Step 3, grooving the existing lining at the installation position of the expanded end part of the prefabricated part 1, wherein the grooving depth and width are matched with the expanded end part of the prefabricated part 1, grouting materials are filled between the grooving depth and the expanded end part of the prefabricated part 1, and the installation schematic diagram is shown in a large drawing D (see fig. 21).
The invention can reinforce the lining in any arc length range according to the design requirement, and the connection between the prefabricated parts 1 is shown in a B pattern (as shown in figure 4). The connection between the prefabricated part 1 and the basement is shown in the general view A (as in figure 3). The connection between the prefabricated element 1 and the existing lining is shown in the large figure C (as in figure 5).
Example 4:
as shown in fig. 26 to 27, the present embodiment is used for reinforcing a railway tunnel lining structure.
The procedure of this example is the same as that of example 1 or example 2 or example 3, except that: step 1, block design is carried out according to the section profile of the railway tunnel.
Example 5:
as shown in fig. 28, the reinforcing device is used for reinforcing the shield tunnel lining structure in the embodiment.
The procedure of this example is the same as that of example 1 or example 2 or example 3, except that: step 1, designing in blocks according to the section profile of the shield tunnel.
The above embodiments may be modified as appropriate by those skilled in the art to which the present application pertains, based on the disclosure of the above specification. Therefore, the present application is not limited to the specific embodiments disclosed and described above. Any modifications or equivalents made within the principles of the present application should also fall within the scope of the present application.
Claims (10)
1. A tunnel lining structure reinforcing method is characterized by comprising the following steps:
step 1, designing a prefabricated part: designing the material proportion, the cross section shape, the geometric dimension, the curvature radius, the arrangement of a reinforcing net and an embedded part, the distribution of reserved pore channels, the blocking mode and the connection mode of the prefabricated part (1) according to the actual section profile, the material strength, the reinforcement condition, the technical condition value, the bearing capacity requirement and the functional requirement of the tunnel lining structure to be reinforced;
step 2, prefabricating the components in a factory: producing a prefabricated part (1) according to the design scheme in the step 1, and reserving a pore channel for mounting a first connecting piece (2) on the prefabricated part (1) according to a design hole position during prefabrication; arranging embedded parts or reserved steel bar welding nets at the ends of the prefabricated parts (1) along the circumferential direction of the tunnel, and connecting the prefabricated parts with the adjacent prefabricated parts (1);
step 3, traffic control and base surface treatment: according to the construction organization scheme, full-hole closed construction or half-width closed construction half-width passing is firstly carried out on the tunnel, then the degraded part and attachments of the surface of the structure in the reinforcing section are removed, and then the surface of the existing concrete structure is subjected to scabbling treatment;
step 4, calibrating the installation position of the prefabricated part (1) and the installation positions of the first connecting piece (2) and the second connecting piece (5) on the surface of the existing tunnel lining structure;
step 5, drilling and cleaning holes at positions where the first connecting piece (2) and the second connecting piece (5) are installed on the surface of the existing structure;
step 6, treating the side wall footing: according to the actual situation, the existing structure of the side wall footing part is removed or not removed, and then drilling and hole cleaning are carried out for installing a third connecting piece (8) and a fourth connecting piece (9);
step 7, mounting the prefabricated part: the prefabricated part (1) is moved to a preset position through an assembling machine, manpower or other mechanical equipment and then is fixed at the preset position through a second connecting piece (2);
8, repeating the step 7 to assemble a plurality of or all prefabricated parts (1);
step 9, connection between the prefabricated parts: connecting two adjacent prefabricated components (1) through a reserved steel bar welding net or an embedded part;
step 10, installing a special baffle: arranging a special baffle (4) at a joint between two adjacent prefabricated components (1) and fixing the special baffle at a preset position of an existing tunnel lining structure through a second connecting piece (5);
step 11, grouting and filling the wall footer, the joint and the wall after the wall, the joint and the gap between the two ends of the prefabricated part (1) along the tunnel direction and the existing lining by adopting edge sealing glue or a template, reserving grouting holes and air outlets, and then grouting the grouting materials in the wall footer and the reserved grouting holes at each longitudinal joint according to the sequence from bottom to top until the gap between the prefabricated part (1) and the existing lining, the joint between two adjacent prefabricated parts (1) and the position of the pedestal of the wall footer are filled and compacted by the grouting materials;
12, repeating the steps 3-11 to finish the reinforcing construction of the lining structure on one side of the closed lane;
and step 13, exchanging the closed lane and the passing lane of the tunnel, and then repeating the steps 3-11 to complete the reinforcing construction of the lining structure on the other side.
2. A method of reinforcing a tunnel lining structure as claimed in claim 1, wherein: when the prefabricated part (1) is produced in the step 2, embedded parts or reserved reinforcing steel bar nets can be arranged at the ends of the prefabricated part (1) along the longitudinal direction of the tunnel and are used for connecting the prefabricated part (1) adjacent to the longitudinal direction.
3. The method for reinforcing a tunnel lining structure according to claim 1, wherein: when the prefabricated part (1) is produced in the step 2, the reinforcing mesh (3) can be arranged in the prefabricated part (1), if the reinforcing mesh (3) adopts a steel bar welding mesh, the end part of the welding mesh extends out of the prefabricated part (1) so as to be welded with the adjacent prefabricated part (1), and an embedded part does not need to be arranged at the end of the prefabricated part (1); and in the step 9, two adjacent prefabricated parts (1) are connected through a reserved steel bar welding net.
4. The method for reinforcing a tunnel lining structure according to claim 1, wherein: in the step 2, when a pore channel for installing the first connecting piece (2) is reserved, if the existing structure is a reinforced concrete structure, a reinforcing steel bar detector is adopted to detect the distribution condition of the reinforcing steel bars in advance, and then the hole positions are moved properly.
5. The method for reinforcing a tunnel lining structure according to claim 1, wherein: in the step 4, the position of the reserved hole channel drawn on the prefabricated part (1) is covered by transparent paper or a positioning plate during calibration, then the position is covered on the surface of the existing structure for calibration, and the hole position for installing the second connecting piece (5) is calibrated by the same method.
6. The method for reinforcing a tunnel lining structure according to claim 1, wherein: the first connecting piece (2), the second connecting piece (5), the third connecting piece (8) and the fourth connecting piece (9) can be mechanical anchor bolts, chemical anchor bolts or embedded bars; when the first connecting piece (2), the second connecting piece (5), the third connecting piece (8) and the fourth connecting piece (9) are chemical anchor bolts or bar planting, glue injection is performed in the drilled hole before the first connecting piece (2), the second connecting piece (5), the third connecting piece (8) and the fourth connecting piece (9) are installed.
7. The method for reinforcing a tunnel lining structure according to claim 6, wherein: the first connecting piece (2) consists of a first connecting rod (21), a first nut (22) and a first tray (23); the second connecting piece (5) consists of a second connecting rod (51), a second nut (52) and a second tray (53).
8. The method for reinforcing a tunnel lining structure according to claim 1, wherein: in the step 3, performing half-width closed construction and half-width traffic control on the tunnel, then starting base surface treatment, removing degraded parts and attachments from a closed side structure, namely a vault to the surface of a basement position in a reinforced section during treatment, and then performing chiseling treatment on the surface of the existing concrete structure; in the step 8, the prefabricated part (1) at the vault position can be installed during construction at the side, and a cantilever type maintenance platform needs to be matched at the moment; can also be installed when constructing on the other side; and after the construction of both sides is finished, the tunnel can be closed in a short time, and then the vault prefabricated part (1) is installed.
9. The method for reinforcing a tunnel lining structure according to claim 1, wherein: in the step 3, full-width closed construction is carried out on the tunnel; in the step 8, the prefabricated parts (1) are assembled in any one of the sequence of installation from the vault to the side walls on two sides, installation from the side walls on two sides to the vault, and installation from one side wall to the other side wall in the clockwise or anticlockwise direction.
10. The method for reinforcing a tunnel lining structure according to claim 1, wherein: the step 1 and the step 2 determine the circumferential reinforcement range according to the disease condition and design the shape and the size of the prefabricated part (1); and 3, performing local reinforcement construction on the tunnel, and grooving the existing lining at the installation position of the enlarged end part of the prefabricated part (1), wherein the grooving depth and width are matched with the enlarged end part of the prefabricated part (1).
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| CN108843341A (en) * | 2018-06-20 | 2018-11-20 | 昆明理工大学 | A kind of the cut-and-cover tunnel structure and its construction method of mixture of piles and concrete wall formula |
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| CN110617087A (en) * | 2019-10-25 | 2019-12-27 | 中铁隧道局集团有限公司 | Tunnel lining steel rail reinforcing structure and construction method |
| CN111365018A (en) * | 2020-03-25 | 2020-07-03 | 上海同岩土木工程科技股份有限公司 | Cover arch reinforcement method suitable for small tunnel clearance |
| AU2020101068A4 (en) * | 2019-06-20 | 2020-07-30 | Swiss Investments Australia Pty Ltd | Method of Producing Precast Building Products |
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| CN108843341A (en) * | 2018-06-20 | 2018-11-20 | 昆明理工大学 | A kind of the cut-and-cover tunnel structure and its construction method of mixture of piles and concrete wall formula |
| CN109519193A (en) * | 2018-11-20 | 2019-03-26 | 中铁局集团有限公司 | A kind of Existing Railway Line tunnel set lining structure and its construction method |
| AU2020101068A4 (en) * | 2019-06-20 | 2020-07-30 | Swiss Investments Australia Pty Ltd | Method of Producing Precast Building Products |
| CN110617087A (en) * | 2019-10-25 | 2019-12-27 | 中铁隧道局集团有限公司 | Tunnel lining steel rail reinforcing structure and construction method |
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