Tunnel fracture zone surrounding rock supporting structure

Abstract

The invention belongs to the technical field of tunnel broken fault zone protection, and particularly relates to a tunnel broken fault zone surrounding rock supporting structure which comprises a blocking grating, a connecting frame and a fixing bolt, the connecting frame is arranged at the side end of the blocking grating, and the fixing bolt is arranged at the side end of the connecting frame. By arranging the side wall supporting frame, the elastic keel, the stretching adjusting rod, the lead screw and the sleeve, when the structure is used, the sleeve is rotated on the lead screw by rotating the sleeve, the distance between the two ends of the blocking grating is adjusted, and the blocking grating can be put into use until the whole blocking grating is in a proper bending radian; then the three sets of side wall supporting frames at the back end of the blocking grating are rotated through the adjusting shafts, so that the structure can be bent in a directional mode, adjustment is conducted according to the actual tunnel protection range, the linear or bent state of the blocking grating is changed at will, and therefore the structure can improve the flexibility in the using process, and the use effect is good. And the overall impact resistance of the structure can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel crushing and fracture zone protection, and in particular to a tunnel crushing and fracture zone surrounding rock support structure. Background Art

[0002] Tunnel fault fracture zone surrounding rock support refers to a series of support measures taken during tunnel construction to ensure the safety and stability of the tunnel in response to the special geological conditions of the surrounding rock in the fault fracture zone. The fault fracture zone is usually composed of rocks broken into gravel and powder, forming a rock mass with extremely poor self-stability, and is often accompanied by groundwater, which is prone to safety risks such as landslides, mud and water inrush. Therefore, external support structures are often used as support to enhance tunnel stability.

[0003] The prior art has the following deficiencies: the prior art "A large-section tunnel fault fracture zone support device" with publication number CN220081460U "includes a tunnel body and a crossbeam, the tunnel body is provided with a crossbeam, the bottom of the crossbeam is provided with a first slot, the first slot is provided with a first block, the bottom of the first block is provided with a fixing column, the bottom of the fixing column is provided with a connecting rod, the bottom of the connecting rod is provided with a supporting column, the supporting column and the connecting rod are fixedly connected, the bottom of the supporting column is provided with a base, the top of the base is provided with a second slot, the bottom of the supporting column is provided with a second block, the second block and the second slot are fixed by clamping, and the top of the base is provided with a fastening bolt";

[0004] The above structure provides convenience for the installation of the device through the crossbeam, the first slot, the first block, the fixed column, the connecting rod, the support column, the second slot and the second block. However, the structure cannot be easily changed in position after installation, and the overall structural form cannot be changed. It cannot be adjusted according to the size of the surrounding rock support required in the tunnel. Therefore, the flexibility of use is not high, and there is no support on the side ends, and the impact resistance is poor. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a surrounding rock support structure for a tunnel fracture zone, which solves the current problems of poor flexibility in use and poor impact resistance.

[0006] To achieve the above object, the present invention provides the following technical solutions: A tunnel fracture zone surrounding rock support structure, comprising a blocking grille, a connecting frame, and a fixing bolt, wherein the connecting frame is arranged at a side end of the blocking grille, and the fixing bolt is arranged at a side end of the connecting frame;

[0007] The rear end of the blocking grille is provided with a side wall support frame, the inner side of the blocking grille is provided with an elastic keel, and the side end of the blocking grille is provided with a stretching adjustment rod;

[0008] The side wall support frame also includes an adjusting shaft and a supporting foot, wherein the adjusting shaft is movably connected to the end of the side wall support frame, and the supporting foot is fixedly installed at the bottom end of the side wall support frame.

[0009] As a preferred technical solution of the present invention, three groups of side wall support frames are provided and fixedly connected to the rear end surface of the blocking grille in an equidistant distribution, and the support legs are parallel to the ground.

[0010] As a preferred technical solution of the present invention, the stretch adjustment rod is divided into two parts as a whole, and is distributed in symmetrical positions and fixedly installed at the ends of both sides of the blocking grille.

[0011] As a preferred technical solution of the present invention, the stretching adjustment rod further includes a screw rod and a sleeve, the screw rod is fixedly connected to one side end of the stretching adjustment rod, and the sleeve is plugged into the other side end of the stretching adjustment rod.

[0012] As a preferred technical solution of the present invention, the sleeve establishes a movable connection relationship with the screw rod through a threaded connection, and the outer end surface of the sleeve is provided with an externally wrapped annular structure, and the surface of the annular structure is provided with multiple groups of grooves.

[0013] As a preferred technical solution of the present invention, the elastic keel is made of memory metal, the monomer is a columnar structure, every two groups form a pair, and four pairs are provided in this solution.

[0014] As a preferred technical solution of the present invention, the blocking grille and the connecting frame are movably connected via fixing bolts, and the blocking grilles are arranged in a bending manner following the elastic keel in a multi-group combination manner.

[0015] Compared with the prior art, the present invention provides a surrounding rock support structure for a tunnel fracture zone, which has the following beneficial effects:

[0016] The tunnel fracture zone surrounding rock support structure is provided with a side wall support frame, an elastic keel, a stretching adjustment rod, a screw rod and a sleeve. When the structure is used, the operator places it around the fracture zone inside the tunnel, rotates the sleeve on the screw rod, and adjusts the distance between the two ends of the blocking grille until the blocking grille as a whole presents a suitable bending arc, and then the three sets of side wall support frames at the back end of the blocking grille are rotated through the adjustment shaft, so that the support feet are placed horizontally on the ground. At this time, the inner side of the bending of the blocking grille can protect the fracture zone inside the tunnel;

[0017] The above settings and processes can enable the structure to have the following beneficial effects:

[0018] Through the coordination of elastic keels and stretching adjustment rods, the structure can be bent in a directional manner and adjusted according to the actual tunnel protection range, and the straight or curved state of the barrier grille can be changed at will. The design of three sets of side wall support frames can improve the impact resistance of the barrier grille, so that the structure can not only improve flexibility during use, but also improve the overall impact resistance of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the front-end structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the installation position structure of the screw rod and the sleeve of the present invention;

[0022] Figure 4 It is a schematic diagram of the overall structure of the side wall support frame of the present invention.

[0023] In the figure: 1. blocking grille; 2. connecting frame; 3. fixing bolt; 4. side wall support frame; 401. adjustment shaft; 402. support foot; 5. elastic keel; 6. stretching adjustment rod; 601. screw rod; 602. sleeve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In this embodiment: a tunnel fracture zone surrounding rock support structure includes a blocking grille 1, a connecting frame 2, and a fixing bolt 3, wherein the connecting frame 2 is arranged at a side end of the blocking grille 1, and the fixing bolt 3 is arranged at a side end of the connecting frame 2;

[0026] A side wall support frame 4 is provided at the rear end of the blocking grille 1, an elastic keel 5 is provided on the inner side of the blocking grille 1, and a stretching adjustment rod 6 is provided at the side end of the blocking grille 1;

[0027] The side wall support frame 4 further includes an adjusting shaft 401 and a supporting foot 402 . The adjusting shaft 401 is movably connected to the upper end of the side wall support frame 4 , and the supporting foot 402 is fixedly installed at the bottom end of the side wall support frame 4 .

[0028] In this embodiment, three groups of side wall support frames 4 are provided and fixedly connected to the rear end surface of the blocking grille 1 at equal intervals, and the support legs 402 are parallel to the ground; the stretching adjustment rod 6 is divided into two parts as a whole, and is symmetrically distributed and fixedly installed at the ends of both sides of the blocking grille 1;

[0029] Specifically, Figure 1 and Figure 3 As shown, the side wall support frame 4 maintains the overall stable installation of the blocking grille 1, and the stretching adjustment rod 6 adjusts the distance between the two sides of the blocking grille 1;

[0030] In this embodiment, the stretching adjustment rod 6 also includes a screw rod 601 and a sleeve 602, the screw rod 601 is fixedly connected to the side end of the stretching adjustment rod 6 on one side, and the sleeve 602 is plugged into the side end of the stretching adjustment rod 6 on the other side; the sleeve 602 is connected to the screw rod 601 by a threaded connection to establish a movable connection relationship, and the outer end surface of the sleeve 602 is provided with an externally wrapped annular structure, and the outer surface of the annular structure is provided with a plurality of groups of grooves;

[0031] Specifically, Figure 2 and Figure 4 As shown, the annular structure on the outer periphery of the sleeve 602 can effectively increase the friction force when the operator rotates the sleeve 602 to prevent slipping, and the threaded connection between the screw rod 601 and the sleeve 602 can adjust the blocking grille 1 while keeping it fixed as a whole;

[0032] In this embodiment, the elastic keel 5 is made of memory metal, and the single body is a columnar structure. Every two groups form a pair, and four pairs are provided in this scheme. The blocking grille 1 and the connecting frame 2 are movably connected by the fixing bolt 3, and the blocking grille 1 is arranged in a bending manner following the elastic keel 5 in a multi-group combination manner.

[0033] The working principle and use process of the present invention are as follows: when the structure is used, the operator places it around the broken fracture zone inside the tunnel, rotates the sleeve 602 to rotate the sleeve 602 on the screw rod 601, and adjusts the distance between the two ends of the blocking grille 1 until the blocking grille 1 as a whole has a suitable bending arc and can be put into use. Then, the three groups of side wall support frames 4 at the back end of the blocking grille 1 are rotated through the adjusting shaft 401 to place the support water 402 safely on the ground. At this time, the curved inner side of the blocking grille 1 can protect the broken fracture zone inside the tunnel.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tunnel fracture zone surrounding rock support structure, comprising a blocking grille (1), a connecting frame (2), and a fixing bolt (3), wherein the connecting frame (2) is arranged at a side end of the blocking grille (1), and the fixing bolt (3) is arranged at a side end of the connecting frame (2), characterized in that: The rear end of the blocking grille (1) is provided with a side wall support frame (4), the inner side of the blocking grille (1) is provided with an elastic keel (5), and the side end of the blocking grille (1) is provided with a stretching adjustment rod (6); The side wall support frame (4) further comprises an adjustment shaft (401) and a support foot (402), wherein the adjustment shaft (401) is movably connected to the upper end of the side wall support frame (4), and the support foot (402) is fixedly mounted to the bottom end of the side wall support frame (4).

2. A tunnel fracture zone surrounding rock support structure according to claim 1, characterized in that: The side wall support frames (4) are provided in three groups and are fixedly connected to the rear end surface of the blocking grille (1) at equal intervals, and the support legs (402) are parallel to the ground.

3. A tunnel fracture zone surrounding rock support structure according to claim 1, characterized in that: The stretch adjustment rod (6) is divided into two parts as a whole and is symmetrically distributed and fixedly mounted at the ends of both sides of the blocking grille (1).

4. A tunnel fracture zone surrounding rock support structure according to claim 3, characterized in that: The stretching adjustment rod (6) further comprises a screw rod (601) and a sleeve (602), wherein the screw rod (601) is fixedly connected to the side end of the stretching adjustment rod (6) on one side, and the sleeve (602) is plugged into the side end of the stretching adjustment rod (6) on the other side.

5. A tunnel fracture zone surrounding rock support structure according to claim 4, characterized in that: The sleeve (602) is connected to the screw rod (601) in a movable connection through a threaded connection, and the outer end surface of the sleeve (602) is provided with an externally wrapped annular structure, and the surface of the annular structure is provided with a plurality of groups of grooves.

6. The surrounding rock support structure of a tunnel fracture zone according to claim 1, characterized in that: The elastic keel (5) is made of memory metal, and the monomer is a columnar structure. Every two groups form a pair, and four pairs are provided in this solution.

7. The surrounding rock support structure of a tunnel fracture zone according to claim 1, characterized in that: The blocking grille (1) and the connecting frame (2) are movably connected via fixing bolts (3), and the blocking grille (1) is arranged in a curved manner following the elastic keel (5) in a multi-group combination manner.

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