Fixing device for prefabricating and assembling tunnel in waste tunnel
By setting up limiting mechanisms and interlocking bases with precast tunnels within abandoned tunnels, combined with concrete pouring, the problem of requiring a large amount of cement mortar for fixing new tunnels in abandoned tunnels was solved, achieving stable tunnel fixation and cost savings.
Patent Information
- Application Number
- CN202520667441.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-04-10
AI Technical Summary
Existing technologies require a large amount of cement mortar to construct new tunnels in abandoned tunnels, resulting in high project costs, complex structures, and potential safety hazards.
The method involves installing a first and a second limiting mechanism inside the abandoned tunnel. The base and limiting pads are engaged with the precast tunnel segments, and the concrete pouring process is combined to restrict the rotation, lateral and vertical movement of the tunnel, thus simplifying the fixing process.
This method achieved stable fixation of the tunnel, reduced the amount of concrete used, lowered project costs, simplified structural design, and improved safety.
Smart Images
Figure CN223825003U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a waste old tunnel inside prefabricated tunnel's fixing device of assembling technical field, especially in the waste old tunnel inside prefabricated tunnel's fixing device of assembling. BACKGROUND
[0002] With the acceleration of urbanization and the continuous improvement of traffic infrastructure, many early construction tunnels gradually cannot meet modern traffic demand due to problems such as service life, design standard or construction quality, becoming a safety hazard and a bottleneck restricting development. These abandoned tunnels not only occupy valuable land resources, but also may pose potential threats to the surrounding environment and residents' lives, and new traffic infrastructure may need to pass through or use the original tunnel. At present, when a new tunnel is built in an abandoned tunnel, a large amount of cement mortar often needs to be injected around the new tunnel to effectively fix the new tunnel, which often requires a large amount of cement mortar, increasing the engineering cost. SUMMARY
[0003] The utility model provides a kind of in waste old tunnel inside prefabricated tunnel's fixing device of assembling to solve the current corridor system structure complex and the problem of safety hazard.
[0004] The utility model provides a kind of in waste old tunnel inside prefabricated tunnel's fixing device of assembling, including the second tunnel being arranged in the first tunnel, the second tunnel is spliced by multiple pipe pieces, first limiting mechanism and second limiting mechanism are equipped between the second tunnel and the first tunnel, the first limiting mechanism and the second limiting mechanism are respectively arranged at the bottom and top of the second tunnel, the first limiting mechanism includes the pedestal being arranged between the first tunnel and the second tunnel, and the pedestal and the pipe piece of the bottom of the second tunnel are clamped.
[0005] Preferably, a first limiting pad is arranged on the pipe piece at the bottom of the second tunnel, and the first limiting pad is clamped into a limiting groove between the pedestal and the second tunnel.
[0006] Preferably, an arc surface matched with the second tunnel is arranged at the upper end of the pedestal, a pouring cavity is formed between the arc surface and the second tunnel, and concrete is poured in the pouring cavity.
[0007] Preferably, the first limiting pad is provided with an arc surface matched with the pedestal.
[0008] Preferably, a first grouting hole is arranged on the pipe piece, and the first grouting hole is located between the two first limiting pads at the bottom of the second tunnel.
[0009] Preferably, the first limiting pad and the pipe piece at the bottom of the second tunnel are of an integral structure.
[0010] Preferably, the pedestal is formed by cast-in-place concrete.
[0011] Preferably, the second limiting mechanism comprises a limiting groove on the top of the first tunnel and a second limiting block on the top of the second tunnel, the second limiting block is arranged between the limiting groove and the segment, and the segment is provided with a second grouting hole between two adjacent second limiting blocks.
[0012] Preferably, the first limiting block and the second limiting block are symmetrically distributed along a first plane, and the first limiting block and the second limiting block are symmetrically distributed along a second plane, the first plane and the second plane both pass through the axis of the second tunnel and are perpendicular to each other.
[0013] Preferably, the line between the first grouting hole and the second grouting hole is located on the second plane.
[0014] Compared with the prior art, in the utility model, the bottom of the second tunnel is limited on the base through the clamping mode, so that the second tunnel cannot rotate and move laterally, the first limiting mechanism limits the lateral movement of the second tunnel, and the two are matched, so that the second tunnel cannot rotate, move laterally and move vertically, the structure design is that the limiting mechanism is arranged on the bottom of the second tunnel and the top plate, a large amount of concrete does not need to be injected on the periphery of the second tunnel, the engineering cost is saved, and the overall structure is simple. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for ordinary skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0016] Figure 1 It is a structural schematic diagram of the utility model;
[0017] Figure 2 It is a structural schematic diagram of the utility model; Figure 1 It is an enlarged schematic diagram of the structure in A of the utility model;
[0018] Figure 3 It is a structural schematic diagram of the utility model; Figure 1 It is an enlarged schematic diagram of the structure in B of the utility model;
[0019] Figure 4 It is a structural schematic diagram of the segment of the utility model with the first limiting block;
[0020] Figure 5 It is a bottom view of the utility model; Figure 4
[0021] Figure 6 It is a structural schematic diagram of the segment of the utility model with the second limiting block.
[0022] Figure label:
[0023] 1. First tunnel, 11. Limiting groove, 2. Second tunnel, 21. Segment, 22. First grouting hole, 23. Second grouting hole, 3. First limiting mechanism, 31. Base, 32. First limiting pad, 4. Second limiting mechanism, 41. Second limiting pad, 5. First plane, 6. Second plane, 100. Casting cavity. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0025] See attached document Figure 1 and attached Figure 2 This utility model provides a fixing device for prefabricated and assembled tunnels in abandoned tunnels, including a second tunnel 2 set in a first tunnel 1. The second tunnel 2 is composed of multiple segments 21 spliced together. A first limiting mechanism 3 and a second limiting mechanism 4 are provided between the second tunnel 2 and the first tunnel 1. The first limiting mechanism 3 and the second limiting mechanism 4 are respectively set at the bottom and top of the second tunnel 2. The first limiting mechanism 3 at the bottom and the second limiting mechanism 4 at the top cooperate to restrict the vertical movement of the second tunnel 2. The first limiting mechanism 3 includes a base 31 set between the first tunnel 1 and the second tunnel 2. The base 31 is fixed on the first tunnel 1. The base 31 and the segments 21 at the bottom of the second tunnel 2 are snapped together. By snapping together, the bottom of the second tunnel 2 is restricted to the base 31, so that the second tunnel 2 cannot rotate or move laterally. The second limiting mechanism 4 is used to restrict the rotation of the second tunnel 2. The two cooperate to ensure that the second tunnel 2 cannot rotate, move laterally, or move vertically, thereby fixing the second tunnel 2 in the first tunnel 1.
[0026] One embodiment of the connection between the base 31 and the segment 21 at the bottom of the second tunnel 2: Refer to the attached document. Figure 4 and attached Figure 5 The first limiting pad 32 is provided on the pipe segment 21 at the bottom of the second tunnel 2. The first limiting pad 32 is inserted into the limiting groove between the base 31 and the second tunnel 2. The limiting groove is set on the base 31. The first limiting pad 32 and the limiting groove cooperate to restrict the pipe segment 21 at the bottom of the second tunnel 2 from rotating and moving laterally.
[0027] Another embodiment of the engagement between the base 31 and the segment 21 at the bottom of the second tunnel 2: The upper end of the base 31 is provided with an arc surface adapted to the second tunnel 2. The arc surface design can prevent the first limiting pad 32 from moving laterally, thereby further strengthening the limiting effect on the second tunnel 2. A first casting cavity 100 is formed between the arc surface and the second tunnel 2. The first limiting pad 32 is located outside the first casting cavity 100. Concrete is poured inside the first casting cavity 100. The concrete inside the first casting cavity 100 fixes the segment 21 and the base 31 together, thereby preventing the first tunnel 1 from rotating, moving laterally, or moving vertically. At the same time, the first limiting pad 32 engages with the concrete inside the first casting cavity 100, further strengthening the fixing effect of the second tunnel 2. Thirdly, the concrete inside the first casting cavity 100 ensures the contact area between the segment 21 and the base 31, enabling the base 31 to stably support the second tunnel 2.
[0028] As another embodiment of this utility model: the first limiting pad 32 is provided with an arc surface that is compatible with the base 31. This structural design further enhances the limiting effect on the second tunnel 2.
[0029] As another embodiment of this utility model: the segment 21 is provided with a first grouting hole 22, which is located between two first limiting pads 32 at the bottom of the second tunnel 2. The first grouting hole 22 is provided on the segment 21 to facilitate grouting.
[0030] As another embodiment of the present invention: the first limiting pad 32 and the tube segment 21 at the bottom of the second tunnel 2 are an integral structure, and the shape of the first limiting pad 32 gradually decreases from the side closest to the tube segment 21 to the other side.
[0031] As another embodiment of this utility model: the base 31 is made of cast-in-place concrete and is connected to the first tunnel 31, so that the base 31 can be firmly fixed in the first tunnel 1, and at the same time, it is convenient to adjust the height of the base 31 according to the diameter of the first tunnel 1 and the second tunnel 2.
[0032] One implementation of the second limiting mechanism 4: Refer to the attached document. Figure 3 and attached Figure 6The second limiting mechanism 4 includes a limiting groove 11 at the top of the first tunnel 1 and a second limiting pad 41 at the top of the second tunnel 2. The second limiting pad 41 is located between the limiting groove 11 and the segment 21. The limiting groove 11 and the second limiting pad 41 cooperate to restrict the lateral movement of the second tunnel 2. The segment 21 has a second grouting hole 23 between two adjacent second limiting pads 41. A second pouring cavity 100 is formed between the segment 21 and the limiting groove 11. The second limiting pad 41 is located outside the second pouring cavity 100. Concrete is poured into the second pouring cavity 100. The concrete in the second pouring cavity 100 connects the segment 21 and the first tunnel 1 together to form a whole, thereby preventing the second tunnel 2 from rotating, moving laterally, or moving vertically. At the same time, the second limiting pad 41 engages with the concrete in the second pouring cavity 100, further strengthening the fixation effect of the second tunnel 2.
[0033] In another embodiment of this utility model: the first limiting pad 32 and the second limiting pad 41 are symmetrically distributed along the first plane 5, and the first limiting pad 32 and the second limiting pad 41 are symmetrically distributed along the second plane 6. Both the first plane 5 and the second plane 6 pass through the axis of the second tunnel 2 and are perpendicular to each other. Specifically, the line connecting the first grouting hole 22 and the second grouting hole 23 is located on the second plane 6.
[0034] This utility model also provides a method for using a fixing device for prefabricated and assembled tunnels in abandoned tunnels:
[0035] Step 1: A cast-in-place concrete base 31 is placed at the bottom of the first tunnel 1. The base 31 is connected to the first tunnel 1 as a whole. The groove at the bottom of the first tunnel 1 also restricts the lateral movement of the base 31. The upper surface of the base 31 is an arc surface, which is adapted to the segment 21 of the second tunnel 2. The arc surface design can effectively restrict the lateral movement of the second tunnel 2.
[0036] Step 2: After the concrete of the base 31 reaches the design strength, the pipe segment 21 with the first limiting pad 32 is spliced on the top of the base 31, so that the base 31 and the pipe segment 21 form the first pouring cavity 100 between the first limiting pad 32; the second tunnel 2 is spliced in two steps. In this step, only the pipe segment 21 at the bottom of the second tunnel 2 is spliced. The pipe segments 21 at the top and middle of the second tunnel 2 will be spliced later.
[0037] Step 3: Pour concrete into the first casting cavity 100;
[0038] Step 4: After the concrete in the first pouring cavity 100 reaches its design strength, the concrete in the first pouring cavity 100 connects the pipe segment 21 at the bottom of the second tunnel 2 to the base 31 as a whole. With the addition of the first limiting pad 32, a first limiting mechanism 3 is formed. This first limiting mechanism 3 provides support to the second tunnel 2 while restricting its rotation, lateral movement, and vertical movement. The pipe segments 21 are then spliced upwards, and then pipe segments 21 with second limiting pads 41 are spliced at the top of the first tunnel 1, so that the first tunnel 1 and the second tunnel 2 form the second pouring cavity 100 between the second limiting pads 41. In this step, the splicing of the second tunnel 2 is completed.
[0039] Step 5: Concrete is injected into the second pouring cavity 100. After the concrete in the first pouring cavity 100 reaches its design strength, the concrete in the second pouring cavity 100 connects the second tunnel 2 and the first tunnel 1 into one unit. Combined with the second limiting pad 41, a second limiting mechanism 4 is formed. This second limiting mechanism 4 can restrict the rotation, lateral movement, and vertical movement of the second tunnel 2. The second limiting mechanism 4 in step 5, in conjunction with the first limiting mechanism 3 in step 4, further strengthens the fixation effect on the second tunnel 2.
[0040] In this invention, the base 31 provides support for the second tunnel 2 with different apertures. The first limiting pad 32 forms a first casting cavity 100 between the second tunnel 2 and the base 31, and the second limiting pad 41 forms a second casting cavity 100 between the second tunnel 2 and the first tunnel 1. The concrete in the first casting cavity 100 connects the second tunnel 2 and the base 31 together, and the concrete in the second casting cavity 100 connects the first tunnel 1 and the second tunnel 2 together, thereby fixing the second tunnel 2 inside the first tunnel 1. The overall structure is simple, with fewer procedures and less concrete pouring, saving engineering costs and expanding the application scenarios of prefabricated tunnels.
[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A fixing device for prefabricated and assembled tunnels within abandoned tunnels, characterized in that, The system includes a second tunnel located within the first tunnel. The second tunnel is composed of multiple segments. A first limiting mechanism and a second limiting mechanism are provided between the second tunnel and the first tunnel. The first limiting mechanism and the second limiting mechanism are respectively located at the bottom and top of the second tunnel. The first limiting mechanism includes a base located between the first tunnel and the second tunnel. The base is engaged with the segments at the bottom of the second tunnel.
2. The fixing device for prefabricating and assembling tunnels in abandoned tunnels according to claim 1, characterized in that, The second tunnel has a first limiting pad on the bottom segment, which is inserted into the limiting groove between the base and the second tunnel.
3. The fixing device for prefabricating and assembling tunnels in abandoned tunnels according to claim 2, characterized in that, The upper end of the base is provided with an arc surface adapted to the second tunnel, and a casting cavity is formed between the arc surface and the second tunnel, and concrete is poured into the casting cavity.
4. The fixing device for prefabricating and assembling tunnels in abandoned tunnels according to claim 3, characterized in that, The first limiting pad has an arc surface that is adapted to the base.
5. The fixing device for prefabricating and assembling tunnels in abandoned tunnels according to claim 4, characterized in that, The segment is provided with a first grouting hole, which is located between two first limiting pads at the bottom of the second tunnel.
6. The fixing device for prefabricating and assembling tunnels in abandoned tunnels according to claim 5, characterized in that, The first limiting pad and the bottom segment of the second tunnel are an integral structure.
7. The fixing device for prefabricating and assembling tunnels in abandoned tunnels according to claim 6, characterized in that, The base is constructed using cast-in-place concrete.
8. The fixing device for prefabricating and assembling tunnels in abandoned tunnels according to claim 7, characterized in that, The second limiting mechanism includes a limiting groove at the top of the first tunnel and a second limiting pad at the top of the second tunnel. The second limiting pad is located between the limiting groove and the segment, and the segment has a second grouting hole between two adjacent second limiting pads.
9. The fixing device for prefabricating and assembling a tunnel in an abandoned tunnel according to claim 8, characterized in that, The first limiting pad and the second limiting pad are symmetrically distributed along the first plane and the second limiting pad are symmetrically distributed along the second plane. The first plane and the second plane both pass through the axis of the second tunnel and are perpendicular to each other.
10. The fixing device for prefabricating and assembling a tunnel in an abandoned tunnel according to claim 9, characterized in that, The line connecting the first grouting hole and the second grouting hole is located on the second plane.