Tunnel lining reinforcing corrugated steel plate annular assembling structure and assembling method
By using a width-limiting bolt connection method of assembling flange plates first and then assembling them later in the corrugated steel plate assembly, the problem of bolt tightening in narrow spaces was solved, improving the load-bearing capacity and construction efficiency of tunnel lining reinforcement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FUZHOU UNIV
- Filing Date
- 2026-01-12
- Publication Date
- 2026-04-17
AI Technical Summary
In existing technologies, when assembling corrugated steel plates with tunnel linings in narrow spaces, it is difficult to achieve the design requirements for bolt tightening, which affects the load-bearing capacity of the joints.
The flange plates are assembled first and then connected to the channel steel plate by upper width-limiting bolts. Combined with waterproof membrane, single-sided bolt tightening is achieved, ensuring assembly quality and construction efficiency.
Efficient assembly was achieved in confined spaces, improving the load-bearing capacity and construction quality of the joints, solving the problem of bolt tightening, and ensuring the controllability and efficiency of construction.
Smart Images
Figure CN121875753A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of tunnel construction technology, and in particular to a circumferential assembly structure and assembly method for reinforcing corrugated steel plates for tunnel lining. Background Technology
[0002] In existing tunnel lining reinforcement projects, to shorten the construction period and reduce the impact on traffic operations, a common reinforcement scheme is to assemble corrugated steel structures on the inner side of the tunnel lining and then fill the gap between them with concrete. However, the assembly quality of the corrugated steel structure directly affects the reinforcement effect, and the performance of the splice joints is particularly critical, as it determines the overall stiffness and load-bearing capacity of the structure.
[0003] Currently, two main types of joints are used in the project: lap joints and flange joints. Lap joints use double-layer corrugated steel plates overlapped and connected with through bolts; flange joints involve welding flanges with bolt holes to the ends of the corrugated steel plates, allowing adjacent pipe segments to be bolted together. It is worth noting that both connection methods require sufficient operating space on both the inner and outer sides of the corrugated steel plate. However, in actual projects, due to the limited gap between the corrugated steel plate and the existing lining, bolt tightening is often difficult on the side closer to the lining, resulting in the joint's load-bearing capacity failing to meet design requirements.
[0004] This construction challenge urgently needs to be addressed, requiring the development of new connection methods or optimization of existing processes to adapt to construction requirements under confined space conditions. Summary of the Invention
[0005] (1) Technical solution This invention provides a circumferential assembly structure for reinforcing tunnel lining with corrugated steel plates, comprising pre-assembled corrugated steel plate segments, post-assembled corrugated steel plate segments, and several lower end bolts. The pre-assembled corrugated steel plate segment includes a pre-assembled corrugated steel plate, a pre-assembled flange plate welded to one side of the pre-assembled corrugated steel plate, a channel steel plate, and several upper end width-limiting bolts. The inner wall of one side of the channel steel plate is welded to the upper side of the pre-assembled flange plate. The post-assembled corrugated steel plate segment includes a post-assembled corrugated steel plate and a post-assembled flange plate welded to one side of the post-assembled corrugated steel plate. The upper parts of the pre-assembled flange plate and the post-assembled flange plate are fixed together by the cooperation between the upper end width-limiting bolts and the channel steel plate. The lower parts of the pre-assembled flange plate and the post-assembled flange plate are fixed together by the lower end bolts. A waterproof membrane is provided between the channel steel plate and the pre-assembled flange plate and the post-assembled flange plate.
[0006] Preferably, the channel steel plate is inverted U-shaped and has several connection holes on both sides that are compatible with the upper width limiting bolt.
[0007] Preferably, the upper part of the pre-assembled flange plate has a plurality of connection holes that are adapted to the upper width limiting bolts.
[0008] Preferably, the upper part of the rear assembly flange plate has a plurality of bolt grooves that are adapted to the upper width limiting bolts.
[0009] Preferably, the number of connecting holes on both sides of the channel steel plate, the number of connecting holes on the upper part of the pre-assembled flange plate, and the number of bolt slots are the same and they are arranged in a one-to-one correspondence.
[0010] Preferably, the bolt groove is a U-shaped groove.
[0011] Preferably, both the pre-assembled flange plate and the post-assembled flange plate have several bolt holes at their lower parts that are compatible with the lower bolts.
[0012] Preferably, the bolt holes on the pre-assembled flange plate and the post-assembled flange plate are arranged in a one-to-one correspondence.
[0013] Preferably, the assembly method of the circumferentially assembled corrugated steel plate for tunnel lining reinforcement includes the following steps: Step S1: Based on the specific dimensions of the existing tunnel lining reinforcement, fabricate the various corrugated steel plate segments, flange plates, channel steel plates, and bolts for the circumferential lining. Step S2: According to the actual assembly sequence, mark all corrugated steel plate segments as either the first or last corrugated steel plate segment to be assembled, and mark the flange plates at the joints of all corrugated steel plate segments as either the first or last flange plates to be assembled. Step S3: Weld the pre-assembled corrugated steel plate together with the pre-assembled flange plate, and weld the later-assembled corrugated steel plate together with the later-assembled flange plate; Step S4: Place the waterproof membrane inside the channel steel plate, weld the channel steel plate to the pre-assembled flange plate, and insert the upper width limiting bolt into the connection hole and tighten it. Step S5: Push the rear-assembled corrugated steel plate segment upward from the inside of the tunnel, so that the rear-assembled flange plate is pushed into the channel steel plate; Step S6: Insert the lower bolts into the bolt holes and tighten the first and second assembled flange plates, thereby assembling the first and second assembled corrugated steel plate segments into one unit.
[0014] (2) Beneficial effects This invention proposes a circumferential assembly structure and method for reinforcing corrugated steel plates in tunnel linings. Compared with existing technologies, this invention has the following advantages: The invention is simple in structure and operation. Upper width-limiting bolts are pre-tightened and locked according to the assembly width of the first and second assembled flange plates, thus limiting the opening of the side plates of the channel steel plate. This allows the upper width-limiting bolts and the channel steel plate to jointly resist the tensile force generated by the reinforced tunnel lining under negative bending moment. Through the single-sided operable flange plate assembly connection design, bolt tightening is only required on the outside of the corrugated steel plate, solving the construction bottleneck of insufficient space on the lining side, while also improving construction efficiency and ensuring controllable construction quality. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of the corrugated steel plate circumferential assembly according to an embodiment of the present invention; Figure 2 This is a schematic elevation view of the flange plate at the splicing point in an embodiment of the present invention; Figure 3 The first assembled corrugated steel plate segment elevation view is shown in the embodiment of the present invention. Figure 4 The side view of the first assembled corrugated steel plate segment is shown in the embodiment of the present invention. Figure 5 This is an elevation view of the post-assembly corrugated steel plate segment of the structure in an embodiment of the present invention; Figure 6 This is a side view of the corrugated steel plate segment assembled after the structure is shown in an embodiment of the present invention.
[0016] The attached diagram is labeled as follows: 1-Pre-assemble corrugated steel plate segment, 2-Post-assemble corrugated steel plate segment, 3-Lower end bolt, 11-Pre-assemble corrugated steel plate, 12-Pre-assemble flange plate, 13-Channel steel plate, 14-Upper end width limiting bolt, 15-Waterproof membrane, 16-Bolt hole, 21-Post-assemble corrugated steel plate, 22-Post-assemble flange plate, 23-Bolt groove. Detailed Implementation
[0017] The present invention will be further described in conjunction with the accompanying drawings and embodiments.
[0018] like Figures 1-6As shown, the circumferential assembly structure of corrugated steel plates for tunnel lining reinforcement according to the present invention includes a pre-assembled corrugated steel plate segment 1, a post-assembled corrugated steel plate segment 2, and several lower end bolts 3. The pre-assembled corrugated steel plate segment 1 includes a pre-assembled corrugated steel plate 11, a pre-assembled flange plate 12 welded to one side of the pre-assembled corrugated steel plate 11, a channel steel plate 13, and several upper end width-limiting bolts 14. The inner wall of one side of the channel steel plate 13 is welded to the upper side of the pre-assembled flange plate 12. The post-assembled corrugated steel plate segment 2 includes a post-assembled corrugated steel plate... 21 and a rear assembly flange plate 22 welded to one side of the rear assembly corrugated steel plate 21. The upper part of the first assembly flange plate 12 and the rear assembly flange plate 22 are fixed together by the upper width limiting bolt 14 and the channel steel plate 13. The lower part of the first assembly flange plate 12 and the rear assembly flange plate 22 are fixed together by the lower bolt 3. A waterproof membrane 15 is provided between the channel steel plate 13 and the first assembly flange plate 12 and the rear assembly flange plate 22, which can improve the waterproofing ability of the reinforced tunnel lining.
[0019] The channel steel plate 13 is inverted U-shaped and has several connection holes on both sides that are adapted to the upper width limiting bolts 14. The upper width limiting bolts 14 are pre-tightened and locked according to the assembly width of the first assembled flange plate 12 and the later assembled flange plate 22 to limit the opening of the two side plates of the channel steel plate 13, so that the upper width limiting bolts 14 and the channel steel plate 13 jointly resist the tensile force generated by the reinforced tunnel lining under the action of negative bending moment.
[0020] The upper part of the pre-assembled flange plate 12 has several connection holes that are adapted to the upper width limiting bolts 14, so that the upper width limiting bolts 14 can be inserted and tightened.
[0021] The upper part of the rear assembly flange plate 22 is provided with a number of bolt grooves 23 that are adapted to the upper width limiting bolts 14. The bolt grooves 23 are U-shaped grooves so that the rear assembly flange plate 22 can be pushed upward from the inside of the tunnel into the channel steel plate 13.
[0022] The number of connecting holes on both sides of the channel steel plate 13, the number of connecting holes on the upper part of the pre-assembled flange plate 12, and the number of bolt slots 23 are the same and they are arranged in a one-to-one correspondence.
[0023] The lower part of both the pre-assembled flange plate 12 and the post-assembled flange plate 22 is provided with a number of bolt holes 16 that are compatible with the lower end bolts 3, so that the lower end bolts 3 can be inserted and fastened to the pre-assembled flange plate 12 and the post-assembled flange plate 22.
[0024] The bolt holes 16 on the pre-assembled flange plate 12 and the post-assembled flange plate 22 are arranged in a one-to-one correspondence.
[0025] The assembly method of the circumferentially assembled corrugated steel plate for tunnel lining reinforcement includes the following steps: Step S1: Based on the specific dimensions of the existing tunnel lining reinforcement, fabricate the various corrugated steel plate segments, flange plates, channel steel plates, and bolts for the circumferential lining. Step S2: According to the actual assembly sequence, mark all corrugated steel plate segments as either corrugated steel plate segment 1 assembled first or corrugated steel plate segment 2 assembled later, and mark the flange plates at the connection of all corrugated steel plate segments as either flange plate 12 assembled first or flange plate 22 assembled later. Step S3: Weld the first assembled corrugated steel plate 11 to the first assembled flange plate 12 together, and weld the second assembled corrugated steel plate 21 to the second assembled flange plate 22 together; Step S4: Place the waterproof membrane 15 inside the channel steel plate 13, weld the channel steel plate 13 to the pre-assembled flange plate 12, and insert the upper width limiting bolt 14 into the connection hole and tighten it. Step S5: Push the rear-assembled corrugated steel plate segment 2 upward from the inside of the tunnel, so that the rear-assembled flange plate 22 is pushed into the channel steel plate; Step S6: Insert the lower bolt 3 into the bolt hole 16 and tighten the first assembled flange plate 12 and the second assembled flange plate 22, so that the first assembled corrugated steel plate segment 1 and the second assembled corrugated steel plate segment 2 are assembled into one piece.
[0026] The embodiments described above are merely preferred embodiments of the present invention, and are described in a relatively specific and detailed manner. However, the present invention is not limited to these embodiments. It should be noted that for those skilled in the art, any modifications made without departing from the spirit of the present invention fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.
Claims
1. A circumferentially assembled structure of corrugated steel plates for tunnel lining reinforcement, characterized in that, The assembly includes a pre-assembled corrugated steel plate segment (1), a post-assembled corrugated steel plate segment (2), and several lower end bolts (3). The pre-assembled corrugated steel plate segment (1) includes a pre-assembled corrugated steel plate (11), a pre-assembled flange plate (12) welded to one side of the pre-assembled corrugated steel plate (11), a channel steel plate (13), and several upper end width-limiting bolts (14). The inner wall of one side of the channel steel plate (13) is welded to the upper side of the pre-assembled flange plate (12). The post-assembled corrugated steel plate segment (2) includes a post-assembled corrugated steel plate (21) and a flange plate (12) welded to the upper side of the pre-assembled flange plate (12). The rear assembly flange (22) on one side of the rear assembly corrugated steel plate (21) is fixed by the upper part of the first assembly flange (12) and the rear assembly flange (22) through the cooperation between the upper width limiting bolt (14) and the channel steel plate (13). The lower part of the first assembly flange (12) and the rear assembly flange (22) is fixed by the lower bolt (3). A waterproof membrane (15) is provided between the channel steel plate (13) and the first assembly flange (12) and the rear assembly flange (22).
2. The circumferential assembly structure of corrugated steel plates for tunnel lining reinforcement according to claim 1, characterized in that, The channel steel plate (13) is inverted U-shaped and has several connection holes on both sides that are compatible with the upper width limiting bolt (14).
3. The circumferential assembly structure of corrugated steel plates for tunnel lining reinforcement according to claim 2, characterized in that, The upper part of the pre-assembled flange plate (12) has several connecting holes that are compatible with the upper width limiting bolts (14).
4. The circumferential assembly structure of corrugated steel plates for tunnel lining reinforcement according to claim 3, characterized in that, The upper part of the rear assembly flange (22) has several bolt grooves (23) that are compatible with the upper width limiting bolts (14).
5. The circumferential assembly structure of corrugated steel plates for tunnel lining reinforcement according to claim 4, characterized in that, The number of connecting holes on both sides of the channel steel plate (13), the number of connecting holes on the upper part of the pre-assembled flange plate (12), and the number of bolt grooves (23) are the same and are set in a one-to-one correspondence.
6. The circumferential assembly structure of corrugated steel plates for tunnel lining reinforcement according to claim 5, characterized in that, The bolt groove (23) is a U-shaped groove.
7. The circumferential assembly structure of corrugated steel plates for tunnel lining reinforcement according to claim 1, characterized in that, The lower part of both the first-assembled flange plate (12) and the second-assembled flange plate (22) is provided with a number of bolt holes (16) that are compatible with the lower bolts (3).
8. The circumferential assembly structure of corrugated steel plates for tunnel lining reinforcement according to claim 7, characterized in that, The bolt holes (16) on the pre-assembled flange plate (12) and the post-assembled flange plate (22) are arranged in a one-to-one correspondence.
9. The assembly method of a circumferentially assembled corrugated steel plate structure for tunnel lining reinforcement according to any one of claims 1-8, characterized in that, Includes the following steps: Step S1: Based on the specific dimensions of the existing tunnel lining reinforcement, fabricate the various corrugated steel plate segments, flange plates, channel steel plates, and bolts for the circumferential lining. Step S2: According to the actual assembly sequence, mark all corrugated steel plate segments as either the first or last corrugated steel plate segment to be assembled, and mark the flange plates at the joints of all corrugated steel plate segments as either the first or last flange plates to be assembled. Step S3: Weld the pre-assembled corrugated steel plate together with the pre-assembled flange plate, and weld the later-assembled corrugated steel plate together with the later-assembled flange plate; Step S4: Place the waterproof membrane inside the channel steel plate, weld the channel steel plate to the pre-assembled flange plate, and insert the upper width limiting bolt into the connection hole and tighten it. Step S5: Push the rear-assembled corrugated steel plate segment upward from the inside of the tunnel, so that the rear-assembled flange plate is pushed into the channel steel plate; Step S6: Insert the lower bolts into the bolt holes and tighten the first and second assembled flange plates, thereby assembling the first and second assembled corrugated steel plate segments into one unit.