Supporting structure for main roadway bottom plate of rubber-tyred vehicle

Abstract

The utility model relates to the technical field of coal mining, in particular to a rubber-tyred vehicle main roadway bottom plate supporting structure which is used for reducing adverse factors of bulging of a rubber-tyred vehicle main roadway bottom plate, reducing deformation of concrete laid on the bottom plate and improving traffic transportation efficiency. Comprising a plurality of anchor rods, a reinforcing mesh layer and a reinforced concrete layer, and a reinforcing mesh is flatly laid on a flattened bottom plate; the anchor rods are evenly arranged on the bottom plate, the bottoms of the anchor rods are arranged in anchor rod holes in the bottom plate, and the reinforced concrete layer is arranged above the reinforcing mesh and in mesh holes of the reinforcing mesh.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining, in particular to a rubber-wheeled vehicle main tunnel floor support structure, which is used to reduce the adverse factor of bulging of the rubber-wheeled vehicle main tunnel floor, reduce the deformation of concrete laid on the floor, and improve traffic transportation efficiency. Background Art

[0002] The rubber-wheeled truck main tunnel is used for transportation of rubber-wheeled trucks in coal mines. In order to effectively relieve the pressure on the tunnel roof, top and side support measures are often used to effectively control the deformation of the tunnel roof. However, since the pressure of the top and side supports will be transmitted to the bottom plate, it will cause the bottom plate of the rubber-wheeled truck main tunnel to easily form a bottom drum. After the bottom drum, the original concrete bottom plate is deformed, and the bottom plate is high and potholes, which greatly affects the travel efficiency of the rubber-wheeled truck and directly restricts the normal material transportation and recycling work. Utility Model Content

[0003] The utility model overcomes the deficiencies of the existing technology and aims to solve the following technical problems: providing a support structure for a rubber-wheeled vehicle tunnel, effectively controlling the deformation of the bottom plate and improving the stability of the bottom plate by changing the bottom plate structure of the rubber-wheeled vehicle tunnel, making full use of the bearing capacity of the surrounding rock itself, and realizing active support, thereby reducing the degree of damage to the rubber-wheeled vehicle transport tunnel caused by the bottom drum, and helping to improve traffic efficiency.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a rubber-wheeled vehicle main tunnel bottom plate support structure, including multiple anchor rods, steel mesh and reinforced concrete layer, the steel mesh is laid flat on the leveled bottom plate; the anchor rods are evenly arranged on the bottom plate, and their bottoms are arranged in the anchor rod holes on the bottom plate, and the reinforced concrete layer is arranged above the steel mesh and in the mesh holes of the steel mesh.

[0005] The anchor rod is a Ø22×1200mm anchor rod, the end of which is pushed into the bottom of the anchor rod hole, and the end is exposed from the bottom plate, and the exposed length is less than or equal to 50mm.

[0006] The anchor rods are arranged at a spacing of 1000 mm x 1000 mm.

[0007] The anchor rod is fixed in the anchor rod hole by an anchoring agent.

[0008] The designed pre-tightening torque of the anchor rod is 400N·m, and the designed pre-tightening force is 150Kn.

[0009] The steel mesh is a steel mesh with a diameter of 6.5 mm and a mesh size of 100×100 mm.

[0010] The depth of the anchor hole is 0-30 mm greater than the effective length of the anchor.

[0011] The reinforced concrete layer is made of reinforced concrete with a strength grade of C20 and a thickness of 200 mm.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model provides a floor support structure for large tunnels with rubber-wheeled vehicles. After the floor is supported with anchor rods and steel mesh, the deformation of the tunnel's surrounding rock is much smaller than that of a solution without anchor mesh support. Furthermore, floor support is equally important as roof and side support. In this embodiment, by adding anchor rods and steel mesh support to the floor, overall tunnel deformation is coordinated, ensuring overall tunnel deformation and shrinkage, reducing surrounding rock deformation overall and ensuring tunnel stability. This utility model can effectively reduce floor heave and the movement of tunnel sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic cross-sectional view of a floor support structure for a main tunnel of a rubber-tyred vehicle provided in an embodiment of the present utility model;

[0015] Figure 2 A schematic diagram of the planar layout of a floor support structure for a rubber-tyred vehicle tunnel provided in an embodiment of the present utility model;

[0016] In the figure: 1 is the anchor rod, 2 is the steel mesh, 3 is the reinforced concrete layer, 4 is the bottom plate, and 5 is the anchor rod hole. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] like Figures 1 and 2 As shown, the embodiment of the present invention provides a floor support structure for a rubber-tyred vehicle tunnel, comprising a plurality of anchor rods 1, a steel mesh 2, and a reinforced concrete layer 3. The steel mesh 2 is laid flat on a leveled floor 4. The anchor rods 1 are evenly arranged on the floor 4, and their bottoms are arranged in anchor rod holes 5 on the floor 4. The reinforced concrete layer 3 is arranged above the steel mesh 2 and in the mesh of the steel mesh 2. In addition, Figure 2 Only a portion of the steel mesh 2 is schematically drawn. Specifically in this embodiment, the steel mesh 3 is spread throughout the entire plane where the main tunnel floor is located.

[0019] Specifically, in this embodiment, the anchor rod 1 is a Ø22×1200 mm anchor rod, the end of which is pushed into the bottom of the hole, and the tail is exposed from the bottom plate 4, and the exposed length is less than or equal to 50 mm.

[0020] Specifically, in this embodiment, the arrangement spacing of the anchor rods 1 is 1000 mm×1000 mm.

[0021] Specifically, in this embodiment, the anchor rod 1 is fixed in the anchor rod hole 5 by an anchoring agent.

[0022] Specifically, in this embodiment, the designed pre-tightening torque of the anchor rod 1 is 400 N·m, and the designed pre-tightening force is 150 kN.

[0023] Specifically, in this embodiment, the steel mesh 2 is a steel mesh with a diameter of 6.5 mm and a mesh size of 100×100 mm.

[0024] Specifically, in this embodiment, the depth of the anchor hole is 0-30 mm greater than the effective length of the anchor 1 .

[0025] The construction process of the rubber-wheeled vehicle main tunnel floor support structure of the utility model is: laying the bottom → leveling the bottom plate → laying the steel mesh on the bottom plate → drilling anchor holes → cleaning the holes → applying k2335 and z2360 anchoring agents → installing anchor rods → stirring → fastening the tray → laying c20 concrete.

[0026] Furthermore, the construction process is as follows: after the bottom is opened to the designed depth, the bottom plate 4 is leveled, and then the steel mesh 2 is laid on the bottom plate 4. After the laying is completed, the anchor hole 5 is drilled. The hole depth of the anchor hole 5 should not be less than the effective length of the rod body, nor should it be greater than 30mm of the effective length of the rod body. The end of the anchor must be pushed to the bottom of the hole, and the exposed length of the end should not be greater than 50mm. The coal (rock) powder in the hole must be drained. After the hole is cleaned, the K2335 and Z2360 anchoring agents are pushed into the anchor hole 5, and then the anchor is installed and tightened on the tray. After the anchor is tightened, reinforced concrete is laid on top of the steel mesh 2. The strength grade of the reinforced concrete is C20 and the thickness is 200mm.

[0027] In summary, the present invention provides a floor support structure for large tunnels with rubber-wheeled vehicles. After the floor is supported with anchor rods and steel mesh, the deformation of the tunnel's surrounding rock is significantly less than that observed without anchor mesh support. Furthermore, floor support is as important as roof and side support. In this embodiment, by adding anchor rods and steel mesh support to the floor, overall tunnel deformation is coordinated, ensuring overall tunnel deformation and shrinkage, overall reducing surrounding rock deformation and ensuring tunnel stability. The present invention can effectively reduce floor heave and the movement of tunnel sides.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A floor support structure for a rubber-tyred vehicle tunnel, characterized in that: The invention comprises a plurality of anchor rods (1), a steel mesh (2) and a reinforced concrete layer (3), wherein the steel mesh (2) is laid flat on a flattened bottom plate (4); the anchor rods (1) are evenly arranged on the bottom plate (4), and their bottoms are arranged in anchor rod holes (5) on the bottom plate (4); the reinforced concrete layer (3) is arranged above the steel mesh (2) and in the mesh holes of the steel mesh (2); The anchor rod (1) is a Ø22×1200mm anchor rod, the end of which is pushed into the bottom of the anchor rod hole (5), and the end is exposed from the bottom plate (4), and the exposed length is less than or equal to 50mm.

2. A rubber-tyred vehicle main tunnel floor support structure according to claim 1, characterized in that: The anchor rods (1) are arranged at a spacing of 1000 mm x 1000 mm.

3. The floor support structure for a rubber-tyred vehicle main tunnel according to claim 1 is characterized in that: The anchor rod (1) is fixed in the anchor rod hole (5) by means of an anchoring agent.

4. The floor support structure for a rubber-tyred vehicle main tunnel according to claim 1 is characterized in that: The designed pre-tightening torque of the anchor rod (1) is 400 N·m, and the designed pre-tightening force is 150 kN.

5. The floor support structure for a rubber-tyred vehicle main tunnel according to claim 1 is characterized in that: The steel mesh (2) is a steel mesh with a diameter of 6.5 mm and a mesh size of 100*100 mm.

6. The floor support structure for a main tunnel of a rubber-tyred vehicle according to claim 1 is characterized in that: The depth of the anchor hole is 0-30 mm greater than the effective length of the anchor (1).

7. The floor support structure for a main tunnel of a rubber-tyred vehicle according to claim 1 is characterized in that: The reinforced concrete layer (3) is made of reinforced concrete with a strength grade of C20 and has a thickness of 200 mm.

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