Road tunnel pedestrian transverse cave crack reinforcing structure
By using corrugated steel plates and C30 micro-expansion concrete in the pedestrian cross passage of a highway tunnel, the problem of low construction efficiency in confined spaces was solved, achieving efficient reinforcement and reducing safety risks and operational pressure.
Patent Information
- Application Number
- CN202520248988.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-02-17
AI Technical Summary
The narrow space of pedestrian cross passages in highway tunnels leads to low efficiency in reinforcement construction, making it impossible to operate large machinery and difficult to implement commonly used reinforcement methods, thus affecting structural safety and traffic safety.
The reinforcement structure combines corrugated steel plates with C30 micro-expansion concrete. It forms a reinforcement lining by prefabricating small-sized assembly blocks and bolting, and uses micro-expansion concrete for reinforcement. It also serves as a formwork, improving construction efficiency.
Achieving efficient reinforcement in confined spaces reduces construction procedures, alleviates traffic pressure in operating tunnels, lowers safety risks, and improves structural and traffic safety.
Smart Images
Figure CN223781446U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of tunnel construction technology, specifically a reinforcement structure for cracked pedestrian cross passages in highway tunnels. Background Technology
[0002] With the increasing operational time of highway tunnels in my country, pedestrian cross passages have exhibited defects such as lining cracking, exposed reinforcement, and water seepage due to various factors including engineering geology, construction technology, and construction quality management. These defects not only endanger the structural safety of the pedestrian cross passages but also significantly impact the main tunnel structure and traffic safety. The narrow space of pedestrian cross passages (2.5m high and 2.0m wide) severely restricts mechanical operations and reduces construction efficiency, making it difficult to implement many commonly used reinforcement methods for the main tunnel, such as lining replacement and reinforced concrete lining. Furthermore, the pressure to maintain smooth traffic flow in operational highway tunnels inevitably influences the selection of reinforcement structures and methods. Therefore, it is essential to adopt a reinforcement structure for damaged pedestrian cross passages in highway tunnels that facilitates construction within the confined space of the cross passage, improves the structural safety and reinforcement efficiency of the pedestrian cross passages, and eliminates or reduces the structural and safety hazards to the main tunnel caused by defects in the pedestrian cross passages. Utility Model Content
[0003] To address the problems in the reinforcement of damaged pedestrian cross passages in existing highway technologies, this utility model provides a reinforcement structure for damaged pedestrian cross passages in highway tunnels. Through the combination of corrugated steel plates, C30 micro-expansion concrete, and C30 reinforced concrete base slabs, and then through the pouring of C30 micro-expansion concrete, it can effectively solve the problems of low reinforcement construction efficiency and lack of working space for large machinery caused by the narrow space of pedestrian cross passages, and eliminate or reduce the structural and safety hazards of the main tunnel caused by the defects in pedestrian cross passages.
[0004] To achieve the above objectives, the specific technical solution is as follows:
[0005] A reinforcement structure for cracked pedestrian cross passages in highway tunnels includes corrugated steel plates, C30 micro-expansion concrete, and a C30 reinforced concrete base slab. The corrugated steel plates are assembled from 3 or 4 factory-prefabricated 2-1 corrugated steel plate ordinary panels and 2-2 corrugated steel plate side panels. Bolt holes are pre-drilled along the longitudinal edges of the 2-1 corrugated steel plate ordinary panels, with M20×70 high-strength bolts threaded into the holes. Bolt holes are also pre-drilled along the side panels of the 2-1 and 2-2 corrugated steel plate side panels, with M20×70 high-strength bolts threaded into the holes. The C30 reinforced concrete base slab is fixed with M24 anchor bolts, with angle steel fixed to the top of each M24 anchor bolt. The existing concrete lining of the pedestrian cross passage is fixed to the top of each M24 anchor bolt.
[0006] Furthermore, the M24 anchor bolts are connected to the existing concrete lining of the pedestrian tunnel using M24×70 high-strength bolts.
[0007] Furthermore, a 25cm gap is reserved between the corrugated steel plate and the existing concrete lining of the pedestrian tunnel.
[0008] Furthermore, C30 micro-expansion concrete is poured into the gap between the corrugated steel plate and the existing concrete lining of the pedestrian tunnel.
[0009] Furthermore, the corrugated steel plate ordinary section and the corrugated steel plate side section, after being assembled, serve as a structure for reinforcing the pedestrian cross passage and also function as a formwork for pouring C30 micro-expansion concrete.
[0010] Furthermore, the circumferential length of the ordinary corrugated steel plate is 2.6m and the longitudinal width is 1.5m, while the circumferential length of the side corrugated steel plate is 1.3m and the longitudinal width is 1.5m.
[0011] Compared with the prior art, the beneficial effects of this utility model are at least as follows:
[0012] 1) The assembly blocks used in this utility model are all prefabricated in the project, and each assembly block is small in size, which greatly overcomes the problem of narrow working space in the pedestrian cross passage of the tunnel and the inability of large machinery to operate.
[0013] 2) The corrugated steel plate used in this utility model serves as both a reinforcement structure and a formwork for pouring C30 micro-expansion concrete, reducing construction procedures and improving reinforcement efficiency, which can effectively reduce traffic pressure in operating tunnels.
[0014] 3) The reinforcement structure used in this utility model connects the reinforced concrete base plate and the corrugated steel plate micro-expansion concrete liner into a ring by using wall corner angle steel and bolts. Its good reinforcement structure reduces safety risks and also reduces its impact on the main tunnel structure and traffic safety. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the reinforcement structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the unfolded corrugated steel plate;
[0017] Figure 3 yes Figure 1 Large detail drawing at point A in the middle.
[0018] The following components are shown in the diagram: 1. Existing concrete lining of the pedestrian tunnel; 2. Corrugated steel plate; 3. C30 micro-expansion concrete; 4. C30 reinforced concrete base slab; 5. M20×70 high-strength bolts; 6. 200×200×16 angle steel; 7. M24×70 high-strength bolts; 8. M24 anchor bolts; 9. 2-1 ordinary corrugated steel plate; 10. 2-2 side corrugated steel plate. Detailed Implementation
[0019] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.
[0020] like Figure 1-2 As shown, this utility model provides a reinforcement structure for cracked pedestrian cross passages in highway tunnels, addressing the problems of low reinforcement construction efficiency and lack of working space for large machinery due to the confined space of pedestrian cross passages, and eliminating or reducing structural and safety hazards to the main tunnel caused by pedestrian cross passage defects. Based on the above functions, the entire device consists of a corrugated steel plate 2, C30 micro-expansion concrete 3, and a C30 reinforced concrete base slab 4.
[0021] like Figure 2-3 As shown, the corrugated steel plate 2 is assembled from 3 or 4 factory-prefabricated corrugated steel plate ordinary panels 2-19 and corrugated steel plate side panels 2-210. Bolt holes are pre-drilled on the longitudinal edges of the corrugated steel plate ordinary panels 2-19, with M20×70 high-strength bolts 5 threaded inside. Bolt holes are also pre-drilled on the side panels of the corrugated steel plate ordinary panels 2-19 and corrugated steel plate side panels 2-210, with M20×70 high-strength bolts 5 threaded inside. An M24 anchor bolt 8 is fixed to the C30 reinforced concrete base slab 4. A 200×200×16 angle steel 6 is fixed to the top of the M24 anchor bolt 8. An existing concrete lining with a pedestrian cross passage is fixed to the top of the M24 anchor bolt 8. The existing concrete lining 1 of the pedestrian tunnel is connected to the existing concrete lining 1 of the pedestrian tunnel by M24×70 high-strength bolts 7. A 25cm gap is reserved between the corrugated steel plate 2 and the existing concrete lining 1 of the pedestrian tunnel. C30 micro-expansion concrete 3 is poured into the gap reserved between the corrugated steel plate 2 and the existing concrete lining 1 of the pedestrian tunnel. The ordinary corrugated steel plate 9 of 2-1 and the side corrugated steel plate 10 of 2-2 are assembled to serve as the structure for reinforcing the pedestrian tunnel and also as the formwork for pouring C30 micro-expansion concrete 3. The ordinary corrugated steel plate 9 of 2-1 has a circumferential length of 2.6m and a longitudinal width of 1.5m. The side corrugated steel plate 10 of 2-2 has a circumferential length of 1.3m and a longitudinal width of 1.5m.
[0022] Specifically, before operation, it is necessary to understand that the assembly consists of a prefabricated corrugated steel plate 2, C30 micro-expansion concrete 3, and C30 reinforced concrete base slab 4. The prefabricated corrugated steel plate 2 is assembled from 3 or 4 factory-prefabricated 2-1 corrugated steel plate ordinary panels and corrugated steel plate side panels 2-210. Then, bolt holes are pre-drilled along the longitudinal edges of the 3 2-1 corrugated steel plate ordinary panels, and they are assembled into a frame using M20×70 high-strength bolts 5. Similarly, bolt holes are pre-drilled along the longitudinal edges of the 2-1 corrugated steel plate ordinary panels and the 2-2 corrugated steel plate side panels 10, and they are assembled into a frame using M20×70 high-strength bolts 5. The two frames are connected by pre-drilled bolts. The bolt holes are circumferentially spliced using M20×70 high-strength bolts 5. The two assembly methods are staggered. At the same time, before pouring concrete for the C30 reinforced concrete base plate 4, M24×70 anchor bolts 8 are pre-embedded. After the pouring is completed, the top surface of the wall base is connected to the corrugated steel plate 1 using 200×200×16 angle steel 6. The connection between the 200×200×16 angle steel 6 and the corrugated steel plate 1 is made using M24×70 high-strength bolts 7. A 25cm gap is left between the assembled corrugated steel plate 2 and the existing concrete lining 1 of the pedestrian cross passage, and C30 micro-expansion concrete 3 is poured to form a reinforced lining on the surface of the existing lining of the pedestrian cross passage.
[0023] Then, the corrugated steel plate 1, assembled from the 2-1 corrugated steel plate ordinary section and the 2-2 corrugated steel plate side section, serves as a reinforcement structure for the pedestrian cross passage and also as a formwork for pouring C30 micro-expansion concrete. There are only two types of corrugated steel plate assembly blocks, 2-1 and 2-2, which greatly improves the prefabrication efficiency and reduces the prefabrication difficulty. The 2-1 corrugated steel plate ordinary section has a circumferential length of 2.6m and a longitudinal width of 1.5m; the 2-2 corrugated steel plate ordinary section has a circumferential length of 1.3m and a longitudinal width of 1.5m. It has obvious advantages in component transportation and assembly in confined spaces. When assembling the structure, it is first spliced into a ring along the cross section of the tunnel pedestrian cross passage, and then spliced ring by ring to extend longitudinally.
[0024] Finally, each assembly is small in size, a design that can largely overcome the problems of limited working space in tunnel pedestrian cross passages and the inability of large machinery to operate.
[0025] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
[0026] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.
Claims
1. A reinforcement structure for damaged pedestrian cross passages in highway tunnels, comprising corrugated steel plates, C30 micro-expansion concrete, and a C30 reinforced concrete base slab, characterized in that: The corrugated steel plate is assembled from 3 or 4 factory-prefabricated 2-1 corrugated steel plate ordinary panels and 2-2 corrugated steel plate side panels. The longitudinal edge of the 2-1 corrugated steel plate ordinary panel has pre-drilled bolt holes, and M20×70 high-strength bolts are threaded into the bolt holes. The side panels of the 2-1 corrugated steel plate ordinary panel and the 2-2 corrugated steel plate side panels also have pre-drilled bolt holes, and M20×70 high-strength bolts are threaded into the bolt holes. The C30 reinforced concrete base plate is fixed with M24 anchor bolts, and angle steel is fixed to the top of the M24 anchor bolts. The existing concrete lining of the pedestrian cross passage is fixed to the top of the M24 anchor bolts.
2. The reinforcement structure for damaged pedestrian cross passages in highway tunnels according to claim 1, characterized in that: The M24 anchor bolts are connected to the existing concrete lining of the pedestrian tunnel by M24×70 high-strength bolts.
3. The reinforcement structure for damaged pedestrian cross passages in highway tunnels according to claim 1, characterized in that: A 25cm gap is reserved between the corrugated steel plate and the existing concrete lining of the pedestrian tunnel.
4. The reinforcement structure for damaged pedestrian cross passages in highway tunnels according to claim 3, characterized in that: C30 micro-expansion concrete is poured into the gap between the corrugated steel plate and the existing concrete lining of the pedestrian tunnel.
5. The reinforcement structure for damaged pedestrian cross passages in highway tunnels according to claim 1, characterized in that: The corrugated steel plate ordinary section and the corrugated steel plate side section, after being assembled, serve as a structure for reinforcing pedestrian cross passages and also function as a formwork for pouring C30 micro-expansion concrete.
6. The reinforcement structure for damaged pedestrian cross passages in highway tunnels according to claim 1, characterized in that: The circumferential length of the ordinary corrugated steel plate is 2.6m and the longitudinal width is 1.5m, while the circumferential length of the side corrugated steel plate is 1.3m and the longitudinal width is 1.5m.