Explosion control and cracking prevention device for road multi-arch tunnel

Abstract

The invention discloses an explosion control and anti-cracking device for a road multi-arch tunnel, relates to the technical field of road multi-arch tunnels, and solves the problem that a middle partition wall of the multi-arch tunnel is not protected. An explosion control and cracking prevention device for a road multi-arch tunnel comprises a multi-arch tunnel frame and a mid-partition wall, the multi-arch tunnel frame comprises a secondary lining and a primary support, a waterproof layer is arranged between the secondary lining and the mid-partition wall and between the secondary lining and the primary support, and the inner wall of the multi-arch tunnel frame is provided with a waterproof layer. Mounting seats are fixedly mounted in front of and behind the two sides of the mid-partition wall, a protective plate is detachably connected between the two mounting seats, and a plurality of buffer strips are connected to the side, away from the mid-partition wall, of the protective plate at equal intervals. After the protection plate is installed and fixed, when the protection plate is collided, the protection plate firstly makes contact with the buffer strip, the flexible buffer strip conducts partial force unloading, then the impact force on the buffer strip is buffered through the second spring, and therefore the situation that the middle partition wall is damaged by external impact force is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of highway multi-arch tunnels, in particular to an explosion control and crack prevention device for a highway multi-arch tunnel. Background Art

[0002] Highways are passages for automobile transportation. When highways pass through some mountains, tunnels need to be opened inside the mountains for highway construction. Some tunnels are arch tunnels, which are usually connected by two or more arch tunnels to form a special tunnel structure. This design allows tunnels to be connected horizontally, which is suitable for situations where the mountain is not high, the longitudinal length is short, and the horizontal slope is steep, especially when the downhill line of the highway cannot be separated.

[0003] As the central component of the multi-arch tunnel, the middle partition wall plays an important role in bearing and transmitting force. At the same time, the top of the middle partition wall of the multi-arch tunnel is the gathering place of the surrounding rock fissure water, and there is a deformation joint between the secondary lining concrete of the two main tunnels of the multi-arch tunnel and the middle partition wall concrete, which is easy to cause water leakage in the secondary lining of the main tunnel of the multi-arch tunnel, and in serious cases, it will further cause the secondary lining to crack.

[0004] Moreover, in a multi-arch tunnel, the middle partition wall is the main load-bearing structure. Its stress is particularly complex and it is the most critical part of the multi-arch tunnel. Therefore, it is particularly important to protect the middle partition wall. However, some multi-arch tunnels do not have protection for the middle partition wall; therefore, it does not meet the existing needs. In this regard, we propose a highway multi-arch tunnel explosion control and anti-cracking device. Summary of the invention

[0005] The purpose of the present invention is to provide a highway multi-arch tunnel explosion control and crack prevention device to solve the problem proposed in the above background technology that the middle partition wall, as the central component of the multi-arch tunnel, plays an important role in force bearing and force transmission, and at the same time, the top of the middle partition wall of the multi-arch tunnel is the gathering place of surrounding rock fissure water, and there is a deformation joint between the secondary lining concrete of the two main tunnels of the multi-arch tunnel and the middle partition wall concrete, which can easily lead to water leakage of the secondary lining of the main tunnel of the multi-arch tunnel, and in severe cases, it will further cause the secondary lining to crack; and in the multi-arch tunnel, the middle partition wall is the main load-bearing structure, and its force is particularly complex. It is the most critical part of the multi-arch tunnel, so it is particularly important to protect the middle partition wall, but some multi-arch tunnels do not have the problem of protecting the middle partition wall.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a highway multi-arch tunnel explosion control and crack prevention device, comprising a multi-arch tunnel frame and a middle partition wall, the middle partition wall being fixedly arranged between the multi-arch tunnel frames, the multi-arch tunnel frame comprising a secondary lining and an initial support, a waterproof layer being arranged between the secondary lining and the middle partition wall and the initial support, drainage culverts being arranged on both sides of the bottom of the interior of the multi-arch tunnel frame, both sides of the top of the middle partition wall being arranged inclined downward in a circular arc, a backfill structure being arranged on the top of the middle partition wall, a longitudinal drainage ditch being arranged at the intersection of the circular arcs of the middle partition wall being inclined downward, the inner wall of the multi-arch tunnel frame and the front and rear of both sides of the middle partition wall being fixedly installed with mounting seats, a protective plate being detachably connected between the two mounting seats, and a plurality of buffer strips being equidistantly connected to the side of the protective plate away from the middle partition wall.

[0007] Preferably, one end of each of the two drainage culverts is connected through a tunnel drainage trough, and the tunnel drainage trough is arranged to be inclined downward, and the tunnel drainage troughs on both sides are away from the intersection of one end of the drainage culvert and are connected through a tunnel drainage ditch.

[0008] Preferably, the backfill structure of the middle partition wall is a mortar-laid gravel backfill structure, a drainage pipe is vertically opened in the middle of the middle partition wall, the upper end of the drainage pipe is connected to the drainage trough, and the bottom end of the drainage pipe is connected to the middle partition wall drainage ditch.

[0009] Preferably, the mounting seat is U-shaped, a sliding block is slidably connected inside the mounting seat, and a first spring is fixedly connected between one side of the sliding block and the inner wall of the mounting seat.

[0010] Preferably, a through hole is provided on a side of the upper end of the mounting seat away from the middle partition wall, and a limiting rod is inserted through the interior of the through hole.

[0011] Preferably, a clamping block is fixedly connected to one side of the protective plate away from the buffer strip, and the clamping block is clamped between two mounting seats, and connecting blocks are fixedly connected to both sides of the clamping block and the rear side of the protective plate.

[0012] Preferably, the connecting blocks on both sides are movably connected to the inside of the two mounting seats respectively, and the upper ends of the two connecting blocks are provided with limiting grooves. When the connecting blocks are connected to the inside of the mounting seats, the limiting rods are inserted into the inside of the limiting grooves.

[0013] Preferably, a plurality of movable grooves are equidistantly provided on a side of the protective plate away from the mounting seat, and a limiting plate is slidably connected to the interior of each movable groove, a second spring is fixedly connected between one side of the limiting plate and the inner wall of the movable groove, a connecting rod is fixedly connected to the side of the limiting plate away from the second spring, and an end of the connecting rod away from the interior of the movable groove extends through the outer side of the movable groove and is fixedly connected to the rear end of the buffer strip.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention provides drainage channels on both sides of the bottom of the frame of the multi-arch tunnel. When water accumulates inside the tunnel, the water flows into the drainage channels, and the water is drained by the tunnel drainage trough inclined downward, so that the accumulated water flows into the tunnel drainage ditch for discharge. Then, by setting the backfill structure at the top of the middle partition wall, the filling of mortared gravel can ensure the stability of the lining force, and play a role in diverting the drainage ditch to prevent the drainage ditch from being blocked. Then, after the accumulated water passes through the drainage ditch, it is drained into the drainage ditch of the middle partition wall through the drainage pipe, thereby avoiding the problem of water accumulation on the top of the middle partition wall of the multi-arch tunnel, which leads to the cracking of the secondary lining of the multi-arch tunnel.

[0016] 2. The present invention connects the clamping block on one side of the protective plate between the two mounting seats, and then drives the connecting blocks on both sides of the protective plate to be plugged into the inside of the two mounting seats. At this time, the two connecting blocks are in contact with the sliding block and squeeze the first spring to compress. When the connecting block is fully plugged into the inside of the mounting seat, the limiting groove on the upper end of the protective plate corresponds to the through hole, and then the bottom end of the limiting rod is inserted into the inside of the limiting groove, so that the protective plate is installed and fixed to the outside of the middle partition wall for protection. While facilitating installation, it is also convenient for subsequent disassembly and maintenance. After the protective plate is installed and fixed, when the protective plate is collided, the first thing it contacts is the buffer strip, and the flexible buffer strip partially unloads the force, and then the impact force on the buffer strip is buffered by the second spring, thereby preventing the external impact force from damaging the middle partition wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 A front cross-sectional view of the present invention as a whole;

[0019] Figure 3 For the present invention Figure 2 The structural diagram at A in the middle;

[0020] Figure 4 An exploded view of the connection between the mounting base and the protective plate of the present invention;

[0021] Figure 5 is a top cross-sectional view of the protective plate of the present invention;

[0022] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at B in the figure.

[0023] In the figure: 1. Arch tunnel frame; 101. Secondary lining; 102. Initial support; 103. Drainage culvert; 104. Tunnel drainage trough; 105. Tunnel drainage ditch; 2. Middle partition wall; 201. Drainage trough; 202. Drain pipe; 203. Middle partition wall drainage ditch; 3. Waterproof layer; 4. Backfill structure; 5. Mounting seat; 501. Through hole; 6. Sliding block; 7. First spring; 8. Limit rod; 9. Protective plate; 901. Movable groove; 10. Connecting block; 1001. Limit groove; 11. Block; 12. Buffer strip; 13. Limit plate; 14. Second spring; 15. Connecting rod. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] See also Figures 1 to 6 An embodiment of the present invention is as follows: a highway multi-arch tunnel explosion control and crack prevention device, comprising a multi-arch tunnel frame 1 and a middle partition wall 2, the middle partition wall 2 is fixedly arranged between the multi-arch tunnel frames 1, the multi-arch tunnel frame 1 comprises a secondary lining 101 and an initial support 102, a waterproof layer 3 is arranged between the secondary lining 101 and the middle partition wall 2 and the initial support 102, drainage culverts 103 are provided on both sides of the bottom of the internal part of the multi-arch tunnel frame 1, both sides of the top of the middle partition wall 2 are arranged in an arc and inclined downward, a backfill structure 4 is arranged on the top of the middle partition wall 2, a longitudinally arranged drainage ditch 201 is provided at the intersection of the middle partition wall 2 where the arc is inclined downward, the inner wall of the multi-arch tunnel frame 1, and the front and rear of both sides of the middle partition wall 2 are fixedly installed with mounting seats 5, a protective plate 9 is detachably connected between the two mounting seats 5, and a plurality of buffer strips 12 are equidistantly connected to the side of the protective plate 9 away from the middle partition wall 2.

[0026] One end of the two drainage culverts 103 is connected to a tunnel drainage trough 104, and the tunnel drainage trough 104 is set to be inclined downward. The tunnel drainage troughs 104 on both sides are far away from the intersection of one end of the drainage culvert 103, and are connected to the tunnel drainage ditch 105. The drainage culverts 103 are opened on both sides of the bottom end of the internal arch tunnel frame 1. When water accumulates in the tunnel, the water flows into the interior of the drainage culvert 103, and is drained through the downward inclined tunnel drainage trough 104, so that the accumulated water is concentrated and flows into the interior of the tunnel drainage ditch 105 for discharge.

[0027] The backfill structure 4 of the middle partition wall 2 is a mortar-laid gravel backfill structure. A drainage pipe 202 is vertically opened in the middle of the middle partition wall 2. The upper end of the drainage pipe 202 is connected with the drainage ditch 201, and the bottom end of the drainage pipe 202 is connected with the middle partition wall drainage ditch 203. Through the setting of the backfill structure 4 at the top of the middle partition wall 2, the filling of the mortar-laid gravel can ensure the stability of the lining force, and play a diversion role for the drainage ditch 201 to prevent the drainage ditch 201 from being blocked. Then, after the accumulated water passes through the drainage ditch 201, it is drained into the middle partition wall drainage ditch 203 through the drainage pipe 202, thereby avoiding the accumulation of water on the top of the middle partition wall 2 of the arch tunnel, which leads to the cracking of the secondary lining 101 of the arch tunnel.

[0028] The mounting seat 5 is U-shaped, and a sliding block 6 is slidably connected inside the mounting seat 5. A first spring 7 is fixedly connected between one side of the sliding block 6 and the inner wall of the mounting seat 5. A through hole 501 is provided on the side of the upper end of the mounting seat 5 away from the middle partition wall 2, and a limiting rod 8 is inserted and inserted into the through hole 501. A clamping block 11 is fixedly connected to the side of the protective plate 9 away from the buffer strip 12, and the clamping block 11 is clamped between the two mounting seats 5. Connecting blocks 10 are fixedly connected on both sides of the clamping block 11 and on the rear side of the protective plate 9. The connecting blocks 10 on both sides are movably clamped in the interior of the two mounting seats 5 respectively. Limiting grooves 1001 are provided on the upper ends of the two connecting blocks 10. When the connecting block 10 is clamped in the interior of the mounting seat 5, the limiting rod 8 is inserted in the interior of the limiting groove 1001.

[0029] By clamping the clamping block 11 on one side of the protective plate 9 between the two mounting seats 5, and then driving the connecting blocks 10 on both sides of the protective plate 9 to be plugged into the inside of the two mounting seats 5, the two connecting blocks 10 are in contact with the sliding block 6 and squeeze the first spring 7 to compress. When the connecting block 10 is fully inserted into the inside of the mounting seat 5, the limiting groove 1001 at the upper end of the protective plate 9 corresponds to the through hole 501, and then the bottom end of the limiting rod 8 is inserted into the inside of the limiting groove 1001, so that the protective plate 9 is installed and fixed to the outside of the middle partition wall 2 for protection, which is convenient for installation and subsequent disassembly and maintenance.

[0030] A plurality of movable grooves 901 are equidistantly provided on the side of the protective plate 9 away from the mounting seat 5, and a limiting plate 13 is slidably connected to the interior of each movable groove 901, and a second spring 14 is fixedly connected between one side of the limiting plate 13 and the inner wall of the movable groove 901, and a connecting rod 15 is fixedly connected to the side of the limiting plate 13 away from the second spring 14, and one end of the connecting rod 15 away from the inside of the movable groove 901 extends through the outside of the movable groove 901 and is fixedly connected to the rear end of the buffer strip 12. After the protective plate 9 is installed and fixed, when the protective plate 9 is collided, the buffer strip 12 is first contacted, and the flexible buffer strip 12 partially unloads the force, and then the impact force on the buffer strip 12 is buffered by the second spring 14, thereby preventing the external impact force from damaging the middle partition wall 2.

[0031] When the explosion control and crack prevention device of the highway arch tunnel is used, drainage culverts 103 are opened on both sides of the bottom of the arch tunnel frame 1. When water accumulates inside the tunnel, the water flows into the drainage culvert 103, and is drained through the tunnel drainage trough 104 inclined downward, so that the accumulated water flows into the tunnel drainage ditch 105 for discharge. Then, through the backfill structure 4 at the top of the middle partition wall 2, the filling of mortared gravel can ensure the stability of the lining force, and play a role in diverting the drainage ditch 201 to prevent the drainage ditch 201 from being blocked. Then, after the accumulated water passes through the drainage ditch 201, it is drained through the drainage pipe 202 and discharged into the drainage ditch 203 of the middle partition wall, thereby avoiding the problem of water accumulation on the top of the middle partition wall 2 of the arch tunnel, which causes the secondary lining 101 of the arch tunnel to crack.

[0032] And by clamping the clamping block 11 on one side of the protective plate 9 between the two mounting seats 5, and then driving the connecting blocks 10 on both sides of the protective plate 9 to be inserted into the inside of the two mounting seats 5, at this time, the two connecting blocks 10 are in contact with the sliding blocks 6, and squeeze the first spring 7 to compress, when the connecting block 10 is completely inserted into the inside of the mounting seat 5, the limiting groove 1001 at the upper end of the protective plate 9 corresponds to the through hole 501, and then the bottom end of the limiting rod 8 is inserted into the inside of the limiting groove 1001, so that the protective plate 9 is installed and fixed on the outer side of the middle partition wall 2 for protection, which is convenient for installation and also convenient for subsequent disassembly and maintenance;

[0033] After the protective plate 9 is installed and fixed, when the protective plate 9 is hit, the first thing it contacts is the buffer strip 12. The flexible buffer strip 12 partially unloads the force, and then the second spring 14 buffers the impact force on the buffer strip 12, thereby preventing the external impact force from damaging the middle partition wall 2.

[0034] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A highway multi-arch tunnel explosion control and crack prevention device, comprising a multi-arch tunnel frame (1) and a middle partition wall (2), wherein the middle partition wall (2) is fixedly arranged between the multi-arch tunnel frames (1), characterized in that: The multi-arch tunnel frame (1) comprises a secondary lining (101) and an initial support (102), a waterproof layer (3) is arranged between the secondary lining (101) and the middle partition wall (2) and the initial support (102), drainage channels (103) are provided on both sides of the bottom of the interior of the multi-arch tunnel frame (1), both sides of the top of the middle partition wall (2) are arranged in an arc shape and tilted downward, a backfill structure (4) is arranged on the top of the middle partition wall (2), a longitudinal drainage groove (201) is provided at the intersection of the middle partition wall (2) and the arc shape and tilted downward, the inner wall of the multi-arch tunnel frame (1) and the front and rear of both sides of the middle partition wall (2) are fixedly installed with mounting seats (5), a protective plate (9) is detachably connected between the two mounting seats (5), and a plurality of buffer strips (12) are equidistantly connected to the side of the protective plate (9) away from the middle partition wall (2).

2. The explosion control and crack prevention device for a highway multi-arch tunnel according to claim 1, characterized in that: One end of each of the two drainage culverts (103) is connected to a tunnel drainage groove (104), and the tunnel drainage groove (104) is arranged to be inclined downward. The tunnel drainage grooves (104) on both sides are far away from the intersection of one end of the drainage culvert (103) and are connected to a tunnel drainage ditch (105).

3. The explosion control and crack prevention device for a highway multi-arch tunnel according to claim 1, characterized in that: The backfill structure (4) of the middle partition wall (2) is a mortar-laid crushed stone backfill structure, and a drainage pipe (202) is vertically opened in the middle of the middle partition wall (2), the upper end of the drainage pipe (202) is connected to the drainage groove (201), and the bottom end of the drainage pipe (202) is connected to the middle partition wall drainage ditch (203).

4. The explosion control and crack prevention device for a highway multi-arch tunnel according to claim 1, characterized in that: The mounting seat (5) is arranged in a U shape, and a sliding block (6) is slidably connected inside the mounting seat (5), and a first spring (7) is fixedly connected between one side of the sliding block (6) and the inner wall of the mounting seat (5).

5. The explosion control and crack prevention device for a highway multi-arch tunnel according to claim 1, characterized in that: A through hole (501) is provided on a side of the upper end of the mounting seat (5) away from the middle partition wall (2), and a limiting rod (8) is inserted through the interior of the through hole (501).

6. The explosion control and crack prevention device for a highway multi-arch tunnel according to claim 5, characterized in that: A clamping block (11) is fixedly connected to one side of the protective plate (9) away from the buffer strip (12), and the clamping block (11) is clamped between two mounting seats (5). Connecting blocks (10) are fixedly connected to both sides of the clamping block (11) and at the rear side of the protective plate (9).

7. The explosion control and crack prevention device for a highway multi-arch tunnel according to claim 6, characterized in that: The connecting blocks (10) on both sides are movably connected to the inside of the two mounting seats (5) respectively, and the upper ends of the two connecting blocks (10) are provided with limiting grooves (1001). When the connecting blocks (10) are connected to the inside of the mounting seats (5), the limiting rods (8) are inserted into the inside of the limiting grooves (1001).

8. The explosion control and crack prevention device for a highway multi-arch tunnel according to claim 1, characterized in that: A plurality of movable grooves (901) are equidistantly provided on a side of the protective plate (9) away from the mounting seat (5); a limiting plate (13) is slidably connected to the interior of each movable groove (901); a second spring (14) is fixedly connected between one side of the limiting plate (13) and the inner wall of the movable groove (901); a connecting rod (15) is fixedly connected to the side of the limiting plate (13) away from the second spring (14); and an end of the connecting rod (15) away from the interior of the movable groove (901) extends through the outside of the movable groove (901) and is fixedly connected to the rear end of the buffer strip (12).

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