Tunnel anchor protective barrier

Abstract

The utility model discloses a tunnel anchor protective barrier, and relates to the technical field of bridge engineering. The tunnel anchor protective barrier comprises a sheet-pile wall embedded in a mountain body above a tunnel anchor, a reinforced concrete stone blocking wall is fixed to the top face of the sheet-pile wall, and a steel fence is arranged on the top face of the reinforced concrete stone blocking wall; the steel fence comprises a steel frame fixed to the top face of the reinforced concrete stone blocking wall and a steel protection net fixed to the steel frame. According to the tunnel anchor protection barrier provided by the embodiment of the invention, flying stones can be intercepted through the reinforced concrete stone blocking wall and the steel fences, the flying stones are prevented from impacting the tunnel anchor, and the tunnel anchor is protected; compared with an existing protective net, the protective barrier is higher in strength, can effectively resist impact of large flying rocks, is not prone to damage in severe weather and can provide enough protection for the tunnel anchor.

Description

Technical Field

[0001] The present application relates to the technical field of bridge engineering, and in particular to a tunnel anchor protection barrier. Background Art

[0002] In bridge engineering, tunnel anchors are key components of suspension bridges and other bridge structures, and their stability is crucial to the safety of the entire bridge.

[0003] Tunnel construction activities near tunnel anchors may pose a potential safety threat to tunnel anchors, especially construction activities at the tunnel exit, such as clearing dangerous rocks and accumulations on the mountain. These construction activities may generate a large amount of flying rocks, which may pose an impact risk to the tunnel anchors.

[0004] Currently, protective measures for tunnel anchors usually include the installation of protective nets. However, these nets may not be able to withstand the impact of large flying rocks due to insufficient material strength, or may be easily damaged in severe weather conditions, resulting in the nets often being unable to provide adequate protection for tunnel anchors. Utility Model Content

[0005] The purpose of this application is to provide a tunnel anchor protection barrier to solve the problem that the protection net cannot effectively resist the impact of large flying rocks.

[0006] The technical solution adopted by this application to solve its technical problems is:

[0007] A tunnel anchor protective barrier comprises a pile-sheet wall buried in a mountain above the tunnel anchor, a reinforced concrete rock retaining wall being fixed on the top surface of the pile-sheet wall, and a steel fence being provided on the top surface of the reinforced concrete rock retaining wall; the steel fence comprises a steel frame fixed on the top surface of the reinforced concrete rock retaining wall and a steel protective net fixed on the steel frame.

[0008] Furthermore, the steel frame includes a plurality of steel columns arranged at intervals and a plurality of steel cross bars fixed on the steel columns; the lower ends of the steel columns are fixedly connected to the top surface of the reinforced concrete stone retaining wall.

[0009] Furthermore, a mounting hole is provided on the top surface of the reinforced concrete stone retaining wall, and the lower end of the steel column is arranged in the mounting hole and anchored by grouting.

[0010] Furthermore, a mounting pipe is pre-buried in the reinforced concrete stone retaining wall, and the inner cavity of the mounting pipe forms the mounting hole.

[0011] Furthermore, the steel protective net includes a steel wire mesh and a steel grid, and the steel wire mesh and the steel grid are respectively fixed on both sides of the steel frame.

[0012] Furthermore, both side surfaces of the reinforced concrete stone retaining wall are inclined structures that gradually move toward the center from bottom to top.

[0013] Furthermore, the pile-sheet wall includes an embedded section embedded in the mountain and a fixed section connected above the embedded section, and a rockfall trough is formed between the fixed section and the mountain.

[0014] Furthermore, a first buffer is fixed to a side of the fixing section facing the mountain.

[0015] Furthermore, a second buffer member is fixed on the side of the reinforced concrete rock retaining wall facing the mountain.

[0016] Furthermore, the pile-board wall includes a plurality of anti-slip piles and a baffle fixed between two adjacent anti-slip piles.

[0017] Beneficial effects of this application:

[0018] 1. The tunnel anchor protection barrier provided in the embodiment of the present application is achieved by fixing a reinforced concrete rock retaining wall on the top of the pile-sheet wall buried in the mountain, and fixing a steel fence on the top of the reinforced concrete rock retaining wall. When dangerous rocks and accumulations are cleared on the mountain, the reinforced concrete rock retaining wall and the steel fence can be used to intercept flying rocks generated during the clearing process, thereby preventing flying rocks from impacting the tunnel anchors and protecting the tunnel anchors. Compared with existing protective nets, the protective barrier of the present application is stronger, can effectively withstand the impact of larger flying rocks, is not easily damaged in severe weather, and can provide sufficient protection for the tunnel anchors.

[0019] 2. The tunnel anchor protection barrier provided in the embodiment of the present application adopts a combined structure of reinforced concrete stone retaining walls and steel fences. The steel fences can be prefabricated in the factory and then assembled on site, which shortens the construction period and improves the project progress. The steel fences are easy to install and dismantle and can be recycled, thereby improving resource utilization and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 Schematic diagram of the cross-sectional structure of the tunnel anchor protection barrier provided in an embodiment of the present application;

[0022] Figure 2 Schematic diagram of the elevation structure of the tunnel anchor protection barrier provided in an embodiment of the present application;

[0023] Figure 3 It is a structural diagram of the connection between reinforced concrete stone retaining wall and pile-sheet wall.

[0024] Reference numerals:

[0025] 1- Tunnel anchor;

[0026] 2-mountain;

[0027] 3-Pile-sheet wall;

[0028] 31-embedded section;

[0029] 32-fixed segment;

[0030] 33-anti-slip piles;

[0031] 34- baffle;

[0032] 4-Reinforced concrete stone retaining wall;

[0033] 41-Mounting hole;

[0034] 42-installation tube;

[0035] 5-Steel fence;

[0036] 51-Steel frame;

[0037] 511-Steel column;

[0038] 512-steel crossbar;

[0039] 52-Steel guard net;

[0040] 6-rockfall trough;

[0041] 7-first buffer member;

[0042] 8-Second buffer. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0044] It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures. In addition, the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict.

[0045] In the description of the embodiments of the present application, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the application is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. The terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, and an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0046] See also Figure 1 、 Figure 2 、 Figure 3 A tunnel anchor protection barrier provided in an embodiment of the present application includes a pile-sheet wall 3 buried in a mountain 2 above a tunnel anchor 1, a reinforced concrete rock retaining wall 4 fixed to the top surface of the pile-sheet wall 3, and a steel fence 5 provided on the top surface of the reinforced concrete rock retaining wall 4; the steel fence 5 includes a steel frame 51 fixed to the top surface of the reinforced concrete rock retaining wall 4 and a steel protective net 52 fixed on the steel frame 51.

[0047] See also Figure 1 The pile-sheet wall 3 is buried in the mountain 2 above the tunnel anchor 1. It can withstand the lateral pressure from the mountain 2, prevent the mountain 2 from collapsing and sliding, and protect the tunnel anchor 1 below. For example, the highest point of the pile-sheet wall 3 is higher than the top of the secondary lining of the tunnel anchor 1. For example, the highest point of the pile-sheet wall 3 can be about 3 meters higher than the top of the secondary lining of the tunnel anchor 1. Figure 1 、 Figure 3 The reinforced concrete rock retaining wall 4 is cast with reinforced concrete and constructed on top of the pile-sheet wall 3 to provide sufficient strength to withstand the impact of large flying rocks. For example, the reinforced concrete rock retaining wall 4 is cast with C20 concrete and is bonded to the steel bars within the pile-sheet wall 3. The longitudinal steel bars within the reinforced concrete rock retaining wall 4 are arranged vertically at 40cm intervals, the stirrups are arranged longitudinally at 50cm intervals, and expansion joints are provided every 6-10m along the wall. Figure 1 、 Figure 2 The steel fence 5 includes a vertically arranged steel frame 51 and a steel protective net 52 fixed to the steel frame 51. The lower end of the steel frame 51 is fixedly connected to the top surface of the reinforced concrete rock retaining wall 4. Since the steel fence 5 is made of steel, it has high strength and can withstand the impact of large flying rocks. When the pile wall 3, the reinforced concrete rock retaining wall 4 and the steel fence 5 are constructed, a protective barrier that is higher than the top of the secondary lining of the tunnel anchor 1 can be formed as a whole. For example, the horizontal length of the protective barrier is about 55m, which is 9.25m higher than the top of the secondary lining of the tunnel anchor 1.

[0048] The tunnel anchor protection barrier provided in the embodiment of the present application is achieved by fixing a reinforced concrete rock retaining wall 4 on the top of a pile-sheet wall 3 buried in the mountain, and fixing a steel fence 5 on the top of the reinforced concrete rock retaining wall 4. When dangerous rocks and accumulations are cleared on the mountain 2, the reinforced concrete rock retaining wall 4 and the steel fence 5 can be used to intercept flying rocks generated during the clearing process, thereby preventing flying rocks from impacting the tunnel anchor 1 and protecting the tunnel anchor 1. Compared with the existing protective net, the protective barrier of the present application is stronger, can effectively withstand the impact of larger flying rocks, is not easily damaged in bad weather, and can provide sufficient protection for the tunnel anchor.

[0049] The tunnel anchor protection barrier provided in the embodiment of the present application adopts a combined structure of a reinforced concrete stone retaining wall 4 and a steel fence 5, and also has the following advantages: 1. The steel fence 5 can be prefabricated in the factory and then assembled on site, which shortens the construction period and improves the project progress; 2. The steel fence 5 is easy to install and dismantle, and can also be recycled, which improves resource utilization and saves costs; 3. The steel fence 5 can reduce the dead weight of the reinforced concrete stone retaining wall 4 and ensure the stability of the reinforced concrete stone retaining wall 4.

[0050] In some embodiments, see Figure 2 The steel frame 51 includes several spaced-apart steel columns 511 and several steel crossbars 512 fixed to the steel columns 511. The lower ends of the steel columns 511 are fixedly connected to the top surface of the reinforced concrete rock retaining wall 4. For example, the steel columns 511 are made of 16# I-beams and arranged at intervals of 2 meters. The lower ends of the steel columns 511 are embedded 1.25 meters into the reinforced concrete rock retaining wall 4, and the upper ends are exposed 3.25 meters. Three steel crossbars 512 are fixed to the side of each steel column 511 away from the mountain 2. The steel crossbars 512 are made of 75mm angle steel and welded to the steel columns 511.

[0051] In some embodiments, see Figure 3 , the top surface of the reinforced concrete stone retaining wall 4 is provided with a mounting hole 41, and the lower end of the steel column 511 is provided in the mounting hole 41 and is grouting-anchored. Exemplarily, a mounting pipe 42 is pre-buried in the reinforced concrete stone retaining wall 4, and the inner cavity of the mounting pipe 42 forms the mounting hole 41. The mounting pipe 42 can be a PVC pipe or a steel pipe. When the reinforced concrete stone retaining wall 4 is cast, the mounting pipe 42 is pre-buried in the concrete to form the mounting hole 41. After the reinforced concrete stone retaining wall 4 is solidified, the lower end of the steel column 511 is inserted into the mounting pipe 42, and the mounting pipe 42 is filled with grouting material. After the grouting material is solidified, the steel column 511 is anchored in the mounting pipe 42.

[0052] In some embodiments, see Figure 2The steel protective net 52 includes a wire mesh and a steel grid, which are respectively fixed on both sides of the steel frame 51. The wire mesh is a flexible protective net woven from steel wires, and the steel grid is a rigid steel protective net welded from steel bars. The combination of the wire mesh and the steel grid can provide better mechanical properties, withstand larger loads, absorb and disperse the impact of flying rocks, and thus be able to withstand the impact of larger flying rocks. Exemplarily, the diameter of the steel wire in the wire mesh is φ3mm, the mesh size is 5cm×5cm, and the wire mesh is fixed on the side of the steel frame 51 facing the mountain 2; the diameter of the steel bar in the steel grid is φ16mm, the mesh size is 20cm×20cm, and the steel grid is fixed on the side of the steel frame 51 away from the mountain 2. Of course, in other embodiments, the steel protective net 52 can also include only a wire mesh or only a steel grid, which is not specifically limited here.

[0053] In some embodiments, see Figure 1 、 Figure 3 , both sides of the reinforced concrete stone retaining wall 4 are inclined structures that gradually approach the center from bottom to top. Among them, the two sides of the reinforced concrete stone retaining wall 4 include a side facing the mountain 2 and a side away from the mountain 2. Exemplarily, the height of the reinforced concrete stone retaining wall 4 is 3m, the top width is 0.8m, and the bottom width is 2.75m. By setting the two sides of the reinforced concrete stone retaining wall 4 as an inclined structure that gradually approaches the center from bottom to top, the cross-section of the reinforced concrete stone retaining wall 4 is approximately an isosceles trapezoidal structure; when the side of the reinforced concrete stone retaining wall 4 is subjected to lateral impact force, it can not only provide greater ability to resist lateral force, but also disperse the impact force, reduce local pressure on the wall, and increase the service life of the wall. At the same time, this structure is more economical in construction and the construction difficulty is relatively low.

[0054] In some embodiments, see Figure 1 The pile-sheet wall 3 includes an embedded section 31 embedded in the mountain 2 and a fixed section 32 connected above the embedded section 31. A rockfall chute 6 is formed between the fixed section 32 and the mountain 2. The rockfall chute 6 formed between the fixed section 32 and the mountain 2 collects rocks that fall from the mountain 2, facilitating centralized cleanup during construction.

[0055] In some embodiments, see Figure 1, a first buffer 7 is fixed to the side of the fixed section 32 facing the mountain 2. A second buffer 8 is fixed to the side of the reinforced concrete stone retaining wall 4 facing the mountain 2. By providing the first buffer 7 and the second buffer 8, the impact force of flying rocks can be absorbed and mitigated, and the direct impact on the wall can be reduced, thereby improving the protective capability of the structure; the first buffer 7 and the second buffer 8 can also increase the adaptability of the wall to impact, and by dispersing and absorbing the impact force, reduce the vibration of the structure and improve the overall stability. Exemplarily, the first buffer 7 and the second buffer 8 can both include sandbags or waste tires. When waste tires are used as buffers, the recycling of waste can also be achieved, reducing engineering costs.

[0056] In some embodiments, see Figure 2 The pile-sheet wall 3 includes a plurality of anti-slip piles 33 and a baffle 34 fixed between two adjacent anti-slip piles 33. The anti-slip piles 33 can be prefabricated piles or cast-in-place piles.

[0057] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Based on the technical essence of the present application and within the spirit and principles of the present application, any simple modification, equivalent replacement and improvement of the above embodiment shall still fall within the scope of protection of the technical solution of the present application.

Claims

1. A tunnel anchor protection barrier, characterized in that: The invention comprises a pile-sheet wall (3) buried in a mountain (2) above a tunnel anchor (1); a reinforced concrete rock retaining wall (4) is fixed on the top surface of the pile-sheet wall (3); a steel fence (5) is provided on the top surface of the reinforced concrete rock retaining wall (4); the steel fence (5) comprises a steel frame (51) fixed on the top surface of the reinforced concrete rock retaining wall (4) and a steel protective net (52) fixed on the steel frame (51).

2. The tunnel anchor protection barrier according to claim 1, characterized in that: The steel frame (51) comprises a plurality of spaced-apart steel columns (511) and a plurality of steel crossbars (512) fixed to the steel columns (511); the lower ends of the steel columns (511) are fixedly connected to the top surface of the reinforced concrete stone retaining wall (4).

3. The tunnel anchor protection barrier according to claim 2, characterized in that: The top surface of the reinforced concrete stone retaining wall (4) is provided with a mounting hole (41), and the lower end of the steel column (511) is arranged in the mounting hole (41) and is grout-anchored.

4. The tunnel anchor protection barrier according to claim 3, characterized in that: A mounting pipe (42) is pre-buried in the reinforced concrete stone retaining wall (4), and the inner cavity of the mounting pipe (42) forms the mounting hole (41).

5. The tunnel anchor protection barrier according to claim 1, characterized in that: The steel protective net (52) comprises a steel wire mesh and a steel grid, and the steel wire mesh and the steel grid are respectively fixed on both sides of the steel frame (51).

6. The tunnel anchor protection barrier according to claim 1, characterized in that: Both sides of the reinforced concrete stone retaining wall (4) are inclined structures that gradually move toward the center from bottom to top.

7. The tunnel anchor protection barrier according to claim 1, characterized in that The pile-sheet wall (3) comprises a pre-buried section (31) pre-buried in the mountain (2) and a fixed section (32) connected above the pre-buried section (31); a rockfall trough (6) is formed between the fixed section (32) and the mountain (2).

8. The tunnel anchor protection barrier according to claim 7, characterized in that: A first buffer member (7) is fixed to the side of the fixing section (32) facing the mountain (2).

9. The tunnel anchor protection barrier according to claim 1, characterized in that: A second buffer member (8) is fixed on the side of the reinforced concrete rock retaining wall (4) facing the mountain (2).

10. The tunnel anchor protection barrier according to claim 1, characterized in that The pile-sheet wall (3) comprises a plurality of anti-slip piles (33) and a baffle (34) fixed between two adjacent anti-slip piles (33).

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