A tunnel reinforcement structure and method

Abstract

The present invention discloses a tunnel reinforcement structure and method. The tunnel reinforcement structure includes a fixed groove, a sliding groove and end plates. The fixed groove has a first groove bottom and a first groove wall. The first groove wall includes two, and the two first groove walls are fixed on the first groove bottom. The opening of the fixed groove faces the tunnel inner wall. The sliding groove is slidably installed inside or outside the fixed groove. The sliding groove has a second groove bottom and a second groove wall. The second groove wall includes two, and the two second groove walls are fixed on the second groove bottom. The opening of the sliding groove faces the tunnel inner wall. There are at least two end plates. One end plate is fixed in the fixed groove, and the other end plate is fixed in the sliding groove, so as to form at least one cavity for grouting between the tunnel reinforcement structure and the tunnel inner wall. Compared with the prior art, the present invention can realize semi-mechanized operation during tunnel reinforcement, reduce labor intensity, ensure construction safety and improve construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel reinforcement, and particularly to a tunnel reinforcement structure and method. Background Art

[0002] When reinforcing a tunnel in the prior art, metal profiles are usually divided into several pieces according to the size of the tunnel cross-section, and then installed piece by piece by manual handling. After that, grout is injected into the inner cavity of the metal profiles. After the grout solidifies, it supports the profiles, thereby achieving the purpose of tunnel reinforcement. However, this reinforcement method completely relies on manual handling of the profiles, resulting in a relatively high labor intensity, low construction efficiency and safety. Summary of the Invention

[0003] An object of the present invention is to provide a tunnel reinforcement structure and method to achieve semi-mechanized operation during tunnel reinforcement, reduce labor intensity, ensure construction safety, and improve construction efficiency.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention discloses a tunnel reinforcement structure, including:

[0006] A fixed groove, the fixed groove having a first groove bottom and a first groove wall, the first groove wall including two, the two first groove walls being fixed on the first groove bottom, and the opening of the fixed groove facing the tunnel inner wall;

[0007] A sliding groove slidably installed inside or outside the fixed groove, the sliding groove having a second groove bottom and a second groove wall, the second groove wall including two, the two second groove walls being fixed on the second groove bottom, and the opening of the sliding groove facing the tunnel inner wall;

[0008] At least two end plates, one end plate being fixed in the fixed groove, and the other end plate being fixed in the sliding groove, so as to form at least one cavity for grouting between the tunnel reinforcement structure and the tunnel inner wall.

[0009] Preferably, the sliding groove is slidably installed outside the fixed groove.

[0010] Preferably, the sliding groove includes a first sliding groove and a second sliding groove, the fixed groove is used to abut against the top of the tunnel inner wall, the second groove wall of the first sliding groove is used to abut against the tunnel inner wall on one side of the fixed groove, and the second groove wall of the second sliding groove is used to abut against the tunnel inner wall on the other side of the fixed groove.

[0011] Preferably, end plates are fixed in the first sliding groove, the second sliding groove and the fixed groove, so as to form at least two cavities for grouting between the tunnel reinforcement structure and the tunnel inner wall.

[0012] Preferably, there are a plurality of the fixing grooves, which are arranged side by side along the axial direction of the inner wall of the tunnel. A gap is left between two adjacent fixing grooves. A connecting portion is provided at the upper part of the gap. Two adjacent first groove walls are fixedly connected through the connecting portion. The width of the gap is not less than the sum of the thicknesses of two adjacent second groove walls, so that a plurality of the sliding grooves can be arranged side by side along the axial direction of the inner wall of the tunnel.

[0013] Preferably, an elastic member is further provided between the first groove wall and the second groove wall in a pre-compressed manner. The first end of the elastic member is connected to the second groove wall. The second end of the elastic member is in sliding contact with the first groove wall. A positioning hole is provided on the first groove wall, and the positioning hole is used for clamping with the second end of the elastic member when the sliding groove slides into place.

[0014] Preferably, an elastic member is further provided between the first groove wall and the second groove wall in a pre-compressed manner. The first end of the elastic member is connected to the first groove wall. The second end of the elastic member is in sliding contact with the second groove wall. A positioning hole is provided on the second groove wall, and the positioning hole is used for clamping with the second end of the elastic member when the sliding groove slides into place.

[0015] Preferably, a grouting hole is provided on the fixing groove and / or the sliding groove.

[0016] Preferably, the fixing groove, the sliding groove and the end plate are all made of metal materials, and insulating fibers are covered on the fixing groove, the sliding groove and the end plate.

[0017] The present invention also discloses a tunnel reinforcement method, which uses the above-mentioned tunnel reinforcement structure and includes the following steps:

[0018] S1. Design the quantity and size of the fixing grooves and the sliding grooves according to the shape and size of the inner wall of the tunnel;

[0019] S2. Prefabricate the tunnel reinforcement structure and assemble it;

[0020] S3. Transport the tunnel reinforcement structure to the site, fix the fixing grooves to the inner wall of the tunnel, and then slide and unfold the sliding grooves;

[0021] S4. After the unfolding is completed, fix the sliding grooves;

[0022] S5. Make the tunnel reinforcement structure fit tightly with the inner wall of the tunnel by pressing or filling and sealing the gaps, and then grout through the reserved grouting holes on the tunnel reinforcement structure, or drill grouting holes on the tunnel reinforcement structure and then grout. The injected slurry is ultra-high-strength concrete.

[0023] The present invention has achieved the following technical effects compared with the prior art:

[0024] When the tunnel reinforcement structure of the present invention is installed, the sliding groove is slid to the designated position by a sliding method, without having to carry the sliding groove to the designated position, reducing the labor intensity, ensuring the construction safety, improving the construction efficiency, and realizing semi-mechanized construction.

[0025] In a preferred embodiment of the tunnel reinforcement structure of the present invention, a cavity-dividing method is adopted to reduce the volume of each cavity. The slurry can be injected into each cavity separately, thereby reducing the grouting pressure.

[0026] In a preferred embodiment of the tunnel reinforcement structure of the present invention, the fixed groove, the sliding groove and the end plate are all made of metal materials, enabling factory batch production and standardized production. Insulating fibers are covered on the fixed groove, the sliding groove and the end plate, which can achieve insulation and prevent electricity, improving the construction safety.

[0027] In the tunnel reinforcement method of the present invention, the injected slurry is ultra-high-strength concrete, which can improve the overall strength of the tunnel reinforcement structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 Schematic diagram of the positional relationship between the fixed groove and the sliding groove in this embodiment;

[0030] Figure 2 Schematic diagram of the fixed groove in this embodiment;

[0031] Figure 3 Schematic diagram of two sliding grooves arranged side by side along the axial direction of the tunnel inner wall in this embodiment;

[0032] Figure 4 Schematic diagram of the tunnel reinforcement structure in this embodiment before the sliding groove is unfolded;

[0033] Figure 5 Schematic diagram of the tunnel reinforcement structure in this embodiment after the sliding groove is unfolded;

[0034] Description of the reference numerals: 1 fixed groove; 11 first groove bottom; 12 first groove wall; 13 connecting part; 14 gap; 2 sliding groove; 21 second groove bottom; 22 second groove wall; 23 first sliding groove; 24 second sliding groove; 3 elastic member; 4 positioning hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0036] The object of the present invention is to provide a tunnel reinforcement structure and method, which can realize semi-mechanized operation during tunnel reinforcement, reduce labor intensity, ensure construction safety, and improve construction efficiency.

[0037] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Referring to Figures 1 to 5 , this embodiment provides a tunnel reinforcement structure 100, including a fixed groove 1, a sliding groove 2, and end plates. Among them, the fixed groove 1 has a first groove bottom 11 and first groove walls 12. There are two first groove walls 12, and the two first groove walls 12 are fixed on the first groove bottom 11. The opening of the fixed groove 1 faces the tunnel inner wall. The sliding groove 2 is slidably installed inside or outside the fixed groove 1. The sliding groove 2 has a second groove bottom 21 and second groove walls 22. There are two second groove walls 22, and the two second groove walls 22 are fixed on the second groove bottom 21. The opening of the sliding groove 2 faces the tunnel inner wall. There are at least two end plates. One end plate is fixed inside the fixed groove 1, and the other end plate is fixed inside the sliding groove 2, so as to form at least one cavity for grouting between the tunnel reinforcement structure 100 and the tunnel inner wall.

[0039] When the tunnel reinforcement structure 100 of this embodiment is in use, first fix the fixed groove 1 at a specified position on the tunnel inner wall, then slide and expand the sliding groove 2 so that the sliding groove 2 slides to the specified position, and then fix the sliding groove 2 on the tunnel inner wall. At this time, it is judged according to the actual situation whether at least one cavity for grouting is formed between the tunnel reinforcement structure 100 and the tunnel inner wall. To ensure that the cavity is roughly sealed, the tunnel reinforcement structure 100 can be pressed against the tunnel inner wall, or the gap between the tunnel reinforcement structure 100 and the tunnel inner wall can be filled to achieve a roughly sealed connection between the tunnel reinforcement structure 100 and the tunnel inner wall. When the tunnel reinforcement structure 100 is installed, the sliding groove 2 is slid to the specified position by a sliding method, and there is no need to transport the sliding groove 2 to the specified position, which reduces labor intensity, ensures construction safety, improves construction efficiency, and realizes semi-mechanized construction.

[0040] It can be understood that the sliding groove 2 can be slidably installed on the outside of the fixed groove 1 or on the inside of the fixed groove 1. If the sliding groove 2 is slidably installed on the inside of the fixed groove 1, the resistance is relatively large when pulling out the sliding groove 2. Therefore, in this embodiment, it is preferably to slidably install the sliding groove 2 on the outside of the fixed groove 1.

[0041] In this embodiment, the sliding groove 2 includes a first sliding groove 232 and a second sliding groove 242. The fixed groove 1 is used to abut against the top of the tunnel inner wall. The second groove wall 22 of the first sliding groove 232 is used to abut against the tunnel inner wall on one side of the fixed groove 1, and the second groove wall 22 of the second sliding groove 242 is used to abut against the tunnel inner wall on the other side of the fixed groove 1. When the first sliding groove 232 and the second sliding groove 242 are not slidably unfolded, the first sliding groove 232 and the second sliding groove 242 completely or mostly overlap with the fixed groove 1. As the first sliding groove 232 and the second sliding groove 242 are slidably unfolded, the overlapping area between them and the fixed groove 1 gradually decreases until the first sliding groove 232 and the second sliding groove 242 are finally unfolded in place. However, the actual implementation is not limited to this. For example, both the fixed groove 1 and the sliding groove 2 can be one, and the end plates are two. One end plate is fixed in the fixed groove 1, and the other end plate is fixed in the sliding groove 2.

[0042] It should be noted that for the existing tunnel reinforcement structure 100, the cavity for grouting is an integral whole, and the cavity volume is relatively large. In order to fill the cavity with slurry, a relatively large grouting pressure needs to be applied, which is likely to burst the cavity. To solve this problem, this embodiment further adopts a sub-cavity solution. Specifically, in this embodiment, end plates are fixed in both the first sliding groove 232, the second sliding groove 242 and the fixed groove 1, that is, there are at least three end plates. A cavity can be formed between two adjacent end plates. Therefore, at least two cavities for grouting can be formed between the tunnel reinforcement structure 100 and the tunnel inner wall. By adopting the sub-cavity method in this embodiment, the volume of each cavity is reduced. Each cavity can be grouted separately, thereby reducing the grouting pressure.

[0043] Further, in this embodiment, there are multiple fixing grooves 1 arranged side by side along the axial direction of the tunnel inner wall. There is a gap 14 between two adjacent fixing grooves 1. A connecting portion 13 is provided above the gap 14. Two adjacent first groove walls 12 are fixedly connected through the connecting portion 13. The width of the gap 14 is not less than the sum of the thicknesses of two adjacent second groove walls 22, so that multiple sliding grooves 2 can be arranged side by side along the axial direction of the tunnel inner wall. Here, two adjacent first groove walls 12 do not refer to the two first groove walls 12 on the same fixing groove 1, but refer to the first groove walls 12 located on two adjacent fixing grooves 1 respectively. Similarly, two adjacent second groove walls 22 do not refer to the two second groove walls 22 on the same sliding groove 2, but refer to the second groove walls 22 located on two adjacent sliding grooves 2 respectively. The connecting portion 13 is preferably in contact with the tunnel inner wall, so as to separate multiple fixing grooves 1, further reduce the volume of each cavity, and reduce the grouting pressure. In this embodiment, multiple first sliding grooves 232 are arranged side by side along the axial direction of the tunnel inner wall, and multiple second sliding grooves 242 are arranged side by side along the axial direction of the tunnel inner wall. Multiple first sliding grooves 232 arranged side by side are preferably fixedly connected into a whole, and multiple second sliding grooves 242 arranged side by side are preferably fixedly connected into a whole.

[0044] In order to facilitate confirming whether the sliding groove 2 slides and unfolds in place, this embodiment further includes an elastic member 3 pre-compressively arranged between the first groove wall 12 and the second groove wall 22. There are two setting methods for the elastic member 3.

[0045] For the first setting method, the first end of the elastic member 3 is connected to the second groove wall 22, the second end of the elastic member 3 is in sliding contact with the first groove wall 12, and a positioning hole 4 is provided on the first groove wall 12. The positioning hole 4 is used to be clamped with the second end of the elastic member 3 when the sliding groove 2 slides in place.

[0046] For the second setting method, the first end of the elastic member 3 is connected to the first groove wall 12, the second end of the elastic member 3 is in sliding contact with the second groove wall 22, and a positioning hole 4 is provided on the second groove wall 22. The positioning hole 4 is used to be clamped with the second end of the elastic member 3 when the sliding groove 2 slides in place.

[0047] In this embodiment, the elastic member 3 only plays a positioning role. After positioning, the sliding groove 2 can be fixedly connected to the tunnel inner wall through structures such as anchor bolts. The elastic member 3 can be a spring or other structures such as a spring piece.

[0048] When there are two end plates, there is one cavity for grouting, and there is at least one grouting hole, which can be arranged on the fixing groove 1 and / or the sliding groove 2. When end plates are fixed in both the first sliding groove 232, the second sliding groove 242 and the fixing groove 1, that is, when there are more than three end plates, there are at least two cavities for grouting, and there are at least two grouting holes. The positions of the grouting holes are determined according to the distribution of the cavities. The grouting holes can be drilled after the construction of the tunnel reinforcement structure 100 is completed, or can be processed when preparing the fixing groove 1 and the sliding groove 2.

[0049] In this embodiment, the fixing groove 1, the sliding groove 2 and the end plates are all made of metal materials to achieve mass production and standardization in the factory. Insulating fibers are covered on the fixing groove 1, the sliding groove 2 and the end plates to achieve insulation and electricity prevention and improve construction safety. In addition, those skilled in the art can also use a tunnel reinforcement structure 100 made of insulating materials, such as alumina materials.

[0050] This embodiment also provides a tunnel reinforcement method, using the above-mentioned tunnel reinforcement structure 100, which includes the following steps:

[0051] S1. According to the shape and size of the tunnel inner wall, design the quantity and size of the fixing groove 1 and the sliding groove 2.

[0052] S2. Prefabricate the tunnel reinforcement structure 100 and assemble it.

[0053] S3. Transport the tunnel reinforcement structure 100 to the site, fix the fixing groove 1 to the tunnel inner wall, and then slide and unfold the sliding groove 2.

[0054] S4. After the unfolding is completed, fix the sliding groove 2.

[0055] S5. Make the tunnel reinforcement structure 100 closely fit with the tunnel inner wall by pressing or filling and sealing the gaps, and then grout through the reserved grouting holes on the tunnel reinforcement structure 100, or drill grouting holes on the tunnel reinforcement structure 100 and then grout. The injected grout is ultra-high strength concrete (i.e., UHPC).

[0056] Taking the reinforcement method of a three-centered circular tunnel as an example, the sliding groove 2 can include a first sliding groove 232 and a second sliding groove 242. After the first sliding groove 232 and the second sliding groove 242 are unfolded, they are respectively located on both sides of the fixing groove 1. Fix the fixing groove 1 to the center position at the top of the tunnel inner wall through the arch top anchor bolt. After the first sliding groove 232 and the second sliding groove 242 are unfolded, fix the first sliding groove 232 and the second sliding groove 242 through the arch foot device. Finally, apply pressure to the tunnel reinforcement structure 100 through the fastening anchor bolt to make the tunnel reinforcement structure 100 closely fit with the tunnel inner wall. When grouting, ultra-high strength concrete is used, which can improve the overall strength of the tunnel reinforcement structure 100.

[0057] In this specification, specific examples are used to illustrate the principles and implementation manners of the present invention. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation on the present invention.

Claims

1. A tunnel reinforcement structure, characterized in that, Comprising: A fixing groove having a first groove bottom and first groove walls, with two of the first groove walls fixed to the first groove bottom, and the opening of the fixing groove facing the tunnel inner wall; A sliding groove slidably mounted inside or outside the fixing groove, having a second groove bottom and second groove walls, with two of the second groove walls fixed to the second groove bottom, and the opening of the sliding groove facing the tunnel inner wall; At least two end plates, one end plate fixed inside the fixing groove and the other end plate fixed inside the sliding groove; Wherein, when the fixing groove is fixed to the tunnel inner wall, the sliding groove is configured to slide and expand along the axial direction of the tunnel inner wall around the tunnel inner wall, so as to form at least one cavity for grouting between the tunnel reinforcement structure and the tunnel inner wall.

2. The tunnel reinforcement structure according to claim 1, characterized in that The sliding groove includes a first sliding groove and a second sliding groove. The fixing groove is used to abut against the top of the tunnel inner wall. The second groove wall of the first sliding groove is used to abut against the tunnel inner wall on one side of the fixing groove, and the second groove wall of the second sliding groove is used to abut against the tunnel inner wall on the other side of the fixing groove.

3. The tunnel reinforcement structure according to claim 2, characterized in that, End plates are fixed inside the first sliding groove, the second sliding groove and the fixing groove respectively, so as to form at least two cavities for grouting between the tunnel reinforcement structure and the tunnel inner wall.

4. The tunnel reinforcement structure according to claim 1, characterized in that, There are multiple fixing grooves arranged side by side along the axial direction of the tunnel inner wall. A gap is left between two adjacent fixing grooves. A connecting portion is provided at the upper part of the gap. Two adjacent first groove walls are fixedly connected through the connecting portion; the width of the gap is not less than the sum of the thicknesses of two adjacent second groove walls, so that multiple sliding grooves can be arranged side by side along the axial direction of the tunnel inner wall.

5. The tunnel reinforcement structure according to claim 1, characterized in that An elastic member is also pre-compressively arranged between the first groove wall and the second groove wall. The first end of the elastic member is connected to the second groove wall, the second end of the elastic member is in sliding contact with the first groove wall, and a positioning hole is provided on the first groove wall for engaging with the second end of the elastic member when the sliding groove slides into place.

6. The tunnel reinforcement structure according to claim 1, wherein, An elastic member is also pre-compressively arranged between the first groove wall and the second groove wall. The first end of the elastic member is connected to the first groove wall, the second end of the elastic member is in sliding contact with the second groove wall, and a positioning hole is provided on the second groove wall for engaging with the second end of the elastic member when the sliding groove slides into place.

7. The tunnel reinforcement structure according to claim 1, characterized in that, Grouting holes are provided on the fixing groove and / or the sliding groove.

8. The tunnel reinforcement structure according to claim 1, characterized in that, The fixing groove, the sliding groove and the end plate are all made of metal material, and insulating fibers are covered on the fixing groove, the sliding groove and the end plate.

9. A tunnel reinforcement method, using the tunnel reinforcement structure as described in any one of claims 1-8, characterized in that, Including the following steps: S1. Design the quantity and size of the fixing groove and the sliding groove according to the shape and size of the tunnel inner wall; S2. Prefabricate the tunnel reinforcement structure and assemble it; S3. Transport the tunnel reinforcement structure to the site, fix the fixing groove to the tunnel inner wall, and then slide and expand the sliding groove; S4. After the expansion is completed, fix the sliding groove. S5. Make the tunnel reinforcement structure fit tightly with the inner wall of the tunnel by pressing or filling and sealing at the gaps, and then grout through the grouting holes reserved on the tunnel reinforcement structure, or drill grouting holes on the tunnel reinforcement structure and then grout. The injected grout is ultra-high-strength concrete.

Images