Large-section broken surrounding rock tunnel excavation supporting structure

Abstract

The utility model discloses a large-section broken surrounding rock tunnel excavation supporting structure, which belongs to the technical field of tunnel construction, and comprises a base, and the top surface of the base is fixedly connected with two vertical plates. According to the utility model, the tunnel top support and the two tunnel side supports are welded and formed outside the tunnel to be supported, so that the tunnel top support is placed on the arc-shaped top seat, the two tunnel side supports are hung on the side hanging plates, and in addition, the extension protection net is connected between the side protection net and the top protection net; a tunnel top support and a tunnel side support are moved into a to-be-supported tunnel through self-locking trundles, a base, a vertical plate and a top plate, a top protection net on the top face of the tunnel top support is driven by a first electric hydraulic rod to be attached to the top of the tunnel, and a side protection net on the side portion of the tunnel side support is driven by a second electric hydraulic rod to be attached to the inner wall of the tunnel. At the moment, the stretching protection net is stretched, the side protection net, the top protection net and the stretching protection net are used for supporting the inner wall of the tunnel, and rock falling is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel construction technical field more specifically, relate to a big section broken surrounding rock tunnel excavation support structure. BACKGROUND

[0002] Tunnel is the engineering building that is buried in stratum, is one form of human utilization of underground space, tunnel can be divided into traffic tunnel, hydraulic tunnel, municipal tunnel, mine tunnel, military tunnel, and there is broken surrounding rock in tunnel construction, broken surrounding rock refers to the rock mass that is affected by fault, fold, dike insertion extrusion and weathering broken and forms loose, broken rock mass state, the deformation and damage form of this rock mass often shows collapse and sliding, and the scale and characteristics mainly depend on the degree of fragmentation of rock mass and the amount of clay content, tunnel engineering under the condition of broken surrounding rock with poor self-stability is usually as a key project of a project, and the success or failure of tunnel excavation and support under the condition of broken surrounding rock is the decisive factor of whole engineering quality control and progress control, in the process of tunnel construction of big section broken surrounding rock, generally, workers need to install steel pipe and other support structures on the excavated tunnel wall to support, but the broken surrounding rock has poor stability, and workers are dangerous during construction, therefore, we propose a big section broken surrounding rock tunnel excavation support structure. SUMMARY

[0003] In view of the problems in the above background art, the purpose of the utility model is to provide a big section broken surrounding rock tunnel excavation support structure.

[0004] To solve the above problems, the utility model adopts the following technical scheme:

[0005] A big section broken surrounding rock tunnel excavation support structure, including the base, the top surface of the base is fixedly connected with two vertical boards, the top end of two vertical boards is fixedly connected with the top plate, the bottom surface of the top plate is fixedly installed with a plurality of first electric hydraulic rods, the output end of a plurality of first electric hydraulic rods extends to the top of the top plate and is fixedly connected with the arc-shaped top seat, the top of the arc-shaped top seat is sleeved with the tunnel top support, the top surface of the tunnel top support is provided with the top protection net, a group of second electric hydraulic rods is fixedly installed on two vertical boards respectively, the output end of two groups of second electric hydraulic rods extends to the outside of the vertical board and is fixedly connected with the side hanging plate, a plurality of hanging columns are fixedly connected on the outside of two side hanging plates respectively, the tunnel side support is sleeved on the outside of two side hanging plates and located on the hanging column, the outside of two tunnel side supports is provided with the side protection net respectively, the top end of two side protection nets and the two sides of two top protection nets are fixedly connected with the stretching protection net.

[0006] As a preferred scheme of the utility model, the tunnel top support includes a plurality of arc-shaped support steel pipes sleeved on the top surface of the arc-shaped top seat, a plurality of second connecting steel plates are fixedly connected between every two adjacent arc-shaped support steel pipes, second anchor holes are formed in the second connecting steel plates, and the outer side surfaces of the arc-shaped support steel pipes are connected with the inner side surfaces of the top protection net.

[0007] As a preferred scheme of the utility model, the tunnel side support includes a plurality of side support steel pipes arranged on the side of the side hanging plate, a plurality of first connecting steel plates are fixedly connected between every two adjacent side support steel pipes, first anchor holes are formed in the first connecting steel plates, the top surface of the hanging column is attached to the bottom surface of the first connecting steel plate, and the outer side surfaces of the side support steel pipes are connected with the inner side surfaces of the side protection net.

[0008] As a preferred scheme of the utility model, the top surface of the arc-shaped top seat is fixedly connected with a plurality of limiting columns.

[0009] As a preferred scheme of the utility model, the bottom surface of the base is fixedly installed with a plurality of self-locking casters.

[0010] As a preferred scheme of the utility model, the end portions of the two vertical plates are fixedly connected with a handle, and the handle is fixedly installed with a control panel.

[0011] The utility model has the advantages that:

[0012] (1) In the utility model, the tunnel top support and the two tunnel side supports are formed by welding on the tunnel to be supported, the tunnel top support is placed on the arc-shaped top seat, the two tunnel side supports are hung on the side hanging plate, the stretching protection net is connected between the side protection net and the top protection net, the tunnel top support and the tunnel side support are moved into the tunnel to be supported by the self-locking casters, the base, the vertical plate and the top plate, the top protection net on the top surface of the tunnel top support is attached to the tunnel top by the first electric hydraulic rod, the side protection net on the side of the tunnel side support is attached to the tunnel inner wall by the second electric hydraulic rod, the side protection net, the top protection net and the stretching protection net support the tunnel inner wall, the rock falling is effectively avoided, the problem that the danger of directly installing the support mechanism in the tunnel to be supported is avoided, and the safety of the large-section broken surrounding rock tunnel excavation support structure is improved.

[0013] (2) The utility model discloses when two tunnel side supports and tunnel top supports move to the suitable position in the tunnel, the anchor rod is inserted into the tunnel inner wall from the first anchor hole, the anchor rod is inserted into the tunnel top from the second anchor hole, the tunnel top support and the tunnel side support are fixed by anchor rod, and other support steel pipes are welded between the top of side support steel pipe and the end of arc support steel pipe by using the welding machine, thereby forming the whole support steel structure, and the concrete is poured in the subsequent steel structure, and the function of supporting the broken surrounding rock tunnel is realized. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole structure schematic diagram of the utility model;

[0015] Figure 2 It is the whole structure schematic diagram of the utility model roof;

[0016] Figure 3 It is the structure schematic diagram of the utility model top guard net, extension guard net and side guard net;

[0017] Figure 4 It is the structure schematic diagram of the utility model tunnel side support;

[0018] Figure 5 It is the structure schematic diagram of the utility model tunnel top support.

[0019] Mark explanation in drawing:

[0020] 1, base; 2, vertical board; 3, roof; 4, first electric hydraulic rod; 5, arc top seat; 6, tunnel top support; 7, second electric hydraulic rod; 8, side hanging plate; 9, hanging column; 10, tunnel side support; 11, self-locking trundle; 12, side guard net; 13, top guard net; 14, extension guard net; 15, limiting column; 16, push handle; 17, control panel; 18, side support steel pipe; 19, first connecting steel plate; 20, first anchor hole; 21, arc support steel pipe; 22, second connecting steel plate; 23, second anchor hole. DETAILED DESCRIPTION

[0021] The technical schemes in the embodiments of the utility model will be described clearly and completely in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0022] In the description of the utility model, it needs to explain, the term "upper", "lower", "inner", "outer", "top / bottom end" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a specific orientation, structure and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the utility model, it needs to explain, unless otherwise expressly provided and limited, the terms "mounting", "setting", "sleeving / connection", "connection" and so on should be understood broadly, for example, "connection", which can be fixed connection, can also be detachable connection, or integrally connected, which can be mechanical connection, can also be electrical connection, which can be directly connected, can also be indirectly connected through intermediate medium, which can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] Embodiment:

[0025] Please refer to Figures 1-5 A large section broken surrounding rock tunnel excavation support structure, including base 1, the top surface of base 1 is fixedly connected with two vertical plates 2, the top end of two vertical plates 2 is fixedly connected with top plate 3, the bottom surface of top plate 3 is fixedly installed with a plurality of first electric hydraulic rods 4, the output end of a plurality of first electric hydraulic rods 4 extends to the top of top plate 3 and is fixedly connected with arc-shaped top seat 5, arc-shaped top seat 5 is sleeved with tunnel top support 6, the top surface of tunnel top support 6 is provided with top protection net 13, a group of second electric hydraulic rods 7 is fixedly installed on two vertical plates 2 respectively, the output end of two groups of second electric hydraulic rods 7 extends to the outside of vertical plate 2 and is fixedly connected with side hanging plate 8, a plurality of hanging columns 9 are fixedly connected on the outside of two side hanging plates 8 respectively, tunnel side support 10 is sleeved on the outside of two side hanging plates 8 and located on hanging column 9, side protection net 12 is arranged on the outside of two tunnel side supports 10 respectively, and stretching protection net 14 is fixedly connected between the top end of two side protection nets 12 and the two sides of two top protection nets 13.

[0026] In the embodiment, two side protection nets 12, two stretching protection nets 14 and top protection net 13 are used to completely shield the inner wall of the tunnel, so as to avoid rock falling, in addition, the outer diameter of the top end of tunnel top support 6 and the inner diameter of the top end of the tunnel are matched, and the width of tunnel top support 6 is less than the inner diameter of the tunnel after being supported, so that tunnel top support 6 can move smoothly in the tunnel.

[0027] Specifically, please refer to Figure 1 、 Figure 2 andFigure 5 The tunnel top support 6 comprises a plurality of arc-shaped support steel pipes 21 arranged on the top surface of the arc-shaped top base 5, a plurality of second connecting steel plates 22 are fixedly connected between every two adjacent arc-shaped support steel pipes 21, a plurality of second anchoring holes 23 are formed in the second connecting steel plates 22, and the outer side surfaces of the plurality of arc-shaped support steel pipes 21 are connected to the inner side surfaces of the top protection net 13.

[0028] In the embodiment, the anchor rods are inserted into the top of the tunnel through the second anchoring holes 23, so that the tunnel top support 6 is installed and fixed on the top of the tunnel.

[0029] Specifically, please refer to Figure 1 , Figure 2 and Figure 4 The tunnel side support 10 comprises a plurality of side support steel pipes 18 arranged on the side of the side hanging plate 8, a plurality of first connecting steel plates 19 are fixedly connected between every two adjacent side support steel pipes 18, a plurality of first anchoring holes 20 are formed in the first connecting steel plates 19, the top surface of the hanging column 9 is attached to the bottom surface of the first connecting steel plate 19, and the outer side surfaces of the plurality of side support steel pipes 18 are connected to the inner side surfaces of the side protection net 12.

[0030] In the embodiment, the anchor rods are inserted into the inner wall of the tunnel through the first anchoring holes 20, so that the tunnel side support 10 is installed and fixed on the inner wall of the tunnel.

[0031] Specifically, please refer to Figure 2 The top surface of the arc-shaped top base 5 is fixedly connected with a plurality of limiting columns 15.

[0032] In the embodiment, the tunnel top support 6 placed on the arc-shaped top base 5 is limited by the limiting columns 15, so that the limiting columns 15 are inserted into the area surrounded by the arc-shaped support steel pipes 21 and the second connecting steel plates 22, thereby preventing the tunnel top support 6 from falling off the arc-shaped top base 5.

[0033] Specifically, please refer to Figure 2 A plurality of self-locking casters 11 are fixedly installed on the bottom surface of the base 1.

[0034] In the embodiment, the base 1 is supported by the self-locking casters 11, and the base 1 is moved by the self-locking casters 11.

[0035] Specifically, please refer to Figure 2 The end portions of the two standing plates 2 are fixedly connected with a push handle 16, and the push handle 16 is fixedly installed with a control panel 17.

[0036] In the embodiment, the base 1 and the standing plates 2 are pushed by the push handle 16, and the first electric hydraulic rod 4 and the second electric hydraulic rod 7 are controlled by the control panel 17.

[0037] Working principle: in use, first, the tunnel top support 6 is formed by welding a plurality of arc-shaped support steel pipes 21 and a plurality of second connecting steel plates 22, and the top protection net 13 is welded on the top of the tunnel top support 6; in addition, two tunnel side supports 10 are formed by welding a plurality of side support steel pipes 18 and a plurality of first connecting steel plates 19, and the side protection net 12 is welded on the side of the two tunnel side supports 10; then, the tunnel top support 6 is placed on the top of the arc-shaped top seat 5, and the two tunnel side supports 10 are hung on the hanging columns 9 of the two side hanging plates 8; at this time, the stretching protection net 14 is welded between the top protection net 13 and the side protection net 12; then, the base 1, the stand plate 2, the tunnel top support 6 and the tunnel side support 10 are pushed by the hand-held push hand 16 to move in the tunnel, so that the tunnel top support 6 and the two tunnel side supports 10 move to the area to be supported in the tunnel; the arc-shaped top seat 5 and the tunnel top support 6 are driven upward by the first electric hydraulic rod 4, so that the top protection net 13 on the top surface of the tunnel top support 6 is attached to the top of the tunnel; at the same time, the two side hanging plates 8 are driven away from each other by the two groups of second electric hydraulic rods 7, so that the side protection net 12 on the side of the tunnel side support 10 on the two side hanging plates 8 is attached to the inner wall of the tunnel; at this time, the stretching protection net 14 is stretched, the broken surrounding rock is supported by the side protection net 12, the stretching protection net 14 and the top protection net 13, and the rock falling is avoided; finally, the anchor rod is inserted into the inner wall of the tunnel from the first anchor mounting hole 20, and the anchor rod is inserted into the top of the tunnel from the second anchor mounting hole 23; the tunnel top support 6 and the tunnel side support 10 are fixed by the anchor rod, and other support steel pipes are welded between the top end of the side support steel pipe 18 and the end of the arc-shaped support steel pipe 21 by using a welding machine, so that the overall support steel structure is formed, and the concrete is poured in the subsequent steel structure.

[0038] The above merely describes a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A large cross-section broken rock tunnel excavation support structure comprising a base (1), characterised in that: The top surface of the base (1) is fixedly connected with two vertical plates (2), the top ends of the two vertical plates (2) are fixedly connected with a top plate (3), the bottom surface of the top plate (3) is fixedly installed with a plurality of first electric hydraulic rods (4), the output ends of the plurality of first electric hydraulic rods (4) extend to the top of the top plate (3) and are fixedly connected with an arc-shaped top seat (5), the top of the arc-shaped top seat (5) is sleeved with a tunnel top support (6), the top surface of the tunnel top support (6) is provided with a top guard net (13), a group of second electric hydraulic rods (7) are fixedly installed on each of the two vertical plates (2), the output ends of the two groups of second electric hydraulic rods (7) extend to the outer sides of the vertical plates (2) and are fixedly connected with side hanging plates (8), a plurality of hanging columns (9) are fixedly connected to the outer sides of the two side hanging plates (8), respectively, tunnel side supports (10) are sleeved on the outer sides of the two side hanging plates (8) and the hanging columns (9), side guard nets (12) are arranged on the outer sides of the two tunnel side supports (10), respectively, and stretch guard nets (14) are fixedly connected between the top ends of the two side guard nets (12) and the two sides of the two top guard nets (13).

2. A large cross-section broken rock tunnel excavation support structure according to claim 1, characterized in that: The tunnel top support (6) comprises a plurality of arc-shaped support steel pipes (21) sleeved on the top surface of the arc-shaped top seat (5), a plurality of second connecting steel plates (22) are fixedly connected between every two adjacent arc-shaped support steel pipes (21), respectively, second anchor holes (23) are formed in the second connecting steel plates (22), and the outer sides of the plurality of arc-shaped support steel pipes (21) and the inner sides of the top guard nets (13) are connected.

3. The large cross-section broken rock tunnel excavation support structure according to claim 1, characterized in that: The tunnel side support (10) comprises a plurality of side support steel pipes (18) arranged on the side portions of the side hanging plates (8), a plurality of first connecting steel plates (19) are fixedly connected between every two adjacent side support steel pipes (18), respectively, first anchor holes (20) are formed in the plurality of first connecting steel plates (19), the top surface of the hanging column (9) is attached to the bottom surface of the first connecting steel plate (19), and the outer sides of the plurality of side support steel pipes (18) and the inner sides of the side guard nets (12) are connected.

4. The large cross-section broken rock tunnel excavation support structure according to claim 1, characterized in that: The top surface of the arc-shaped top seat (5) is fixedly connected with a plurality of limiting columns (15).

5. A large cross-section broken rock tunnel excavation support structure according to claim 1, characterized in that: The bottom surface of the base (1) is fixedly installed with a plurality of self-locking casters (11).

6. A large cross-section broken rock tunnel excavation support structure according to claim 1, characterized in that: The end portions of the two vertical plates (2) are fixedly connected with push handles (16), and control panels (17) are fixedly installed on the push handles (16).

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