Pre-balance stability control structure for critical slope of mountain highway tunnel portal

Abstract

The utility model provides a mountain highway tunnel portal critical slope pre-balance stability control structure, which belongs to the technical field of construction methods, and comprises a mountain body and a tunnel, a mountain stone layer is paved on the outer side surface of the mountain body close to the tunnel, and a planting layer is paved on the upper surface of the mountain stone layer. The side, close to the tunnel, of the planting layer is fixedly connected with a protective side wall, and the side, close to the tunnel, of the hillstone layer is provided with a reinforcing structure. The protective side wall is arranged at the outer end of the planting layer, the protective layer serving as the second layer can block hillstone breaking through the first vegetation protective layer, water and soil loss of the planting layer can be reduced, the multiple cement columns are injected into the hillstone layer, the hillstone layer can be fixed, and the planting layer can be prevented from being damaged. On the other hand, a layer of cement can be laid on the outer side face of the hillstone layer with the cement columns as fulcrums, and then protection of the hillstone layer to the mountain is reinforced.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction methods, and in particular relates to a critical side slope pre-balance stability control structure for a mountain highway tunnel portal. Background Art

[0002] A highway tunnel refers to an underground passage built for highway traffic. It is usually used to cross mountains, cross waters or pass through areas with complex terrain such as urban areas. The construction of highway tunnels needs to consider many factors such as geological conditions, traffic demand, and environmental protection. The construction of highway tunnels is of great significance to improving traffic mobility, reducing traffic congestion and improving traffic efficiency.

[0003] The existing publication number CN207018004U discloses a critical slope pre-balance stability control structure for a mountain highway tunnel entrance, which is characterized in that a slope foot support retaining wall is set on the side of the slope of the entrance and exit of the tunnel to be excavated away from the mountain, and a soil and stone layer is filled on the slope surface of the tunnel top, one side of the soil and stone layer is overlapped on the slope foot support retaining wall, and the slope foot support structure provides a supporting balance force toward the mountain.

[0004] The existing critical slope pre-balance stability control structure of mountain highway tunnel entrance still has the following shortcomings:

[0005] 1. Mountain highway tunnels are adjacent to mountains. Under severe weather conditions, natural disasters such as landslides are prone to occur. Sliding rocks and rain mud in the tunnel will hinder the passage of vehicles, and sliding mountains will also cause instability in the tunnel.

[0006] 2. The condition of the mountain is difficult to predict, and landslides are difficult to foresee. The opening of a tunnel is a kind of destruction to the mountain, which will increase the firmness of the mountain, and it is necessary to add a stable structure to the surface of the mountain. Utility Model Content

[0007] The utility model aims to solve the problem of landslide in the mountain and reinforce the mountain structure in the prior art, and proposes a critical side slope pre-balance stability control structure for a mountain highway tunnel opening.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A critical slope pre-balance stability control structure for a mountain highway tunnel entrance comprises: a mountain body and a tunnel, wherein a rock layer is paved on the outer side of the mountain body close to the tunnel, a planting layer is paved on the upper surface of the rock layer, a protective side wall is fixedly connected to the planting layer on the side close to the tunnel, and a reinforcement structure is provided on the side close to the tunnel of the rock layer;

[0010] Preferably, the reinforcement structure comprises cement columns and a fixing layer, a plurality of cement columns are inserted into the rock layer, a wire mesh is fixedly connected between the outer ends of the plurality of cement columns, and the fixing layer is arranged on the outer side of the wire mesh;

[0011] Preferably, a plurality of drainage holes are provided on the side of the protective side wall, and a plurality of drainage grooves are provided on the surface of the fixed layer, and the drainage grooves are connected to the drainage holes;

[0012] Preferably, the fixed layer is arranged between the protective side wall and the ground;

[0013] Preferably, the cement column is perpendicular to the surface of the rock layer, and the outer end of the cement column extends into the fixed layer;

[0014] Preferably, the height of the rock layer is set to be twice the height of the tunnel, and the height of the planting layer is set to be half the height of the tunnel.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. The utility model fills a rock layer on the side of the mountain close to the tunnel exit, lays a planting layer on the top of the rock layer, and plants trees, flowers and other vegetation on the planting layer. On the one hand, it can play a role in beautifying the tunnel exit. On the other hand, the vegetation serves as the first layer of protection and can play a buffering role for the rolling rocks and mud.

[0017] 2. The utility model sets a protective side wall at the outer end of the planting layer. Firstly, it serves as a second protective layer to block rocks that break through the first vegetation protective layer. Secondly, it can reduce soil erosion of the planting layer. In addition, a number of cement columns are injected into the rock layer to fix the rock layer. On the other hand, a layer of cement can be laid on the outer side of the rock layer with the cement columns as fulcrums to reinforce the protection of the rock layer against the mountain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the side cross-sectional structure of a critical slope pre-balance stability control structure for a mountain highway tunnel portal proposed by the utility model;

[0019] Figure 2 The utility model is a schematic diagram of the front view of a critical side slope pre-balance stability control structure of a mountain highway tunnel portal.

[0020] In the picture: 1 mountain body, 2 planting layer, 3 rock layer, 4 cement pillars, 5 fixed layer, 6 tunnel, 7 protective side wall, 8 drainage ditch. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Reference Figure 1-Figure 2 A pre-balanced stability control structure for a critical slope of a mountain highway tunnel entrance comprises: a mountain body 1 and a tunnel 6, a rock layer 3 is laid on the outer side of the mountain body 1 near the tunnel 6, a planting layer 2 is laid on the upper surface of the rock layer 3, a protective side wall 7 is fixedly connected to the planting layer 2 near the tunnel 6, and a reinforcement structure is provided on the side of the rock layer 3 near the tunnel 6. By filling the rock layer 3 on the side of the mountain body 1 near the tunnel 6 exit, laying the planting layer 2 above the rock layer 3, and planting trees, flowers and other vegetation on the planting layer 2, on the one hand, it can play a role in beautifying the tunnel 6 exit, and on the other hand, the vegetation serves as the first layer of protection, which can play a buffering role for rolling rocks and sediment;

[0023] The reinforcement structure includes cement columns 4 and a fixing layer 5. Several cement columns 4 are inserted into the rock layer 3. A wire mesh is fixedly connected between the outer ends of several cement columns 4. The fixing layer 5 is arranged on the outside of the wire mesh. The fixing layer 5 is arranged between the protective side wall 7 and the ground. Several drainage holes are opened on the side of the protective side wall 7. Several drainage grooves 8 are arranged on the surface of the fixing layer. The drainage grooves 8 are connected to the drainage holes. The protective side wall 7 is arranged at the outer end of the planting layer 2. First, it serves as a second layer of protection layer to block the rocks that break through the first layer of vegetation protection layer. Second, it can reduce the soil erosion of the planting layer 2. In addition, several cement columns 4 are injected into the rock layer 3 to fix the rock layer 3. On the other hand, a layer of cement can be laid on the outer side of the rock layer 3 with the cement columns 4 as fulcrums to reinforce the protection of the rock layer 3 against the mountain.

[0024] The cement column 4 is perpendicular to the surface of the rock layer 3, and the outer end of the cement column 4 extends into the fixed layer 5;

[0025] The height of the rock layer 3 is set to be twice the height of the tunnel 6 , and the height of the planting layer 2 is set to be half the height of the tunnel 6 .

[0026] The functional principle of the utility model can be explained through the following operation modes:

[0027] By filling a rock layer 3 on the side of the mountain 1 close to the exit of the tunnel 6, laying a planting layer 2 on top of the rock layer 3, and planting vegetation such as trees and flowers on the planting layer 2, on the one hand, it can beautify the exit of the tunnel 6, and on the other hand, the vegetation serves as the first layer of protection, which can play a buffering role for the rolling rocks and mud. By setting a protective side wall 7 at the outer end of the planting layer 2, on the one hand, it can serve as a second layer of protection to block rocks that break through the first layer of vegetation protection layer, and on the other hand, it can reduce soil erosion of the planting layer 2. In addition, a number of cement columns 4 are injected into the rock layer 3 to fix the rock layer 3. On the other hand, on the outer side of the rock layer 3, a layer of cement can be laid with the cement column 4 as a fulcrum to reinforce the protection of the rock layer 3 to the mountain.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A critical slope pre-balance stability control structure for a mountain highway tunnel entrance, characterized in that: The invention comprises a mountain (1) and a tunnel (6), wherein a rock layer (3) is paved on the outer side of the mountain (1) close to the tunnel (6), a planting layer (2) is paved on the upper surface of the rock layer (3), a protective side wall (7) is fixedly connected to the planting layer (2) on the side close to the tunnel (6), and a reinforcement structure is provided on the side close to the tunnel (6).

2. A mountain highway tunnel portal critical slope pre-balance stability control structure according to claim 1, characterized in that: in: The reinforcement structure comprises cement columns (4) and a fixing layer (5), wherein a plurality of cement columns (4) are inserted into the rock layer (3), a wire mesh is fixedly connected between the outer ends of the plurality of cement columns (4), and the fixing layer (5) is arranged on the outer side of the wire mesh.

3. A mountain highway tunnel portal critical slope pre-balance stability control structure according to claim 2, characterized in that: in: A plurality of drainage holes are provided on the side of the protective side wall (7), and a plurality of drainage grooves (8) are provided on the surface of the fixed layer. The drainage grooves (8) are connected to the drainage holes.

4. A mountain highway tunnel portal critical slope pre-balance stability control structure according to claim 2, characterized in that: in: The fixed layer (5) is arranged between the protective side wall (7) and the ground.

5. The critical slope pre-balance stability control structure of a mountain highway tunnel portal according to claim 2, characterized in that: in: The cement column (4) is perpendicular to the surface of the rock layer (3), and the outer end of the cement column (4) extends into the fixed layer (5).

6. The critical slope pre-balance stability control structure of a mountain highway tunnel portal according to claim 1, characterized in that: in: The height of the rock layer (3) is set to be twice the height of the tunnel (6), and the height of the planting layer (2) is set to be half the height of the tunnel (6).

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