Tunnel concrete supporting device

Abstract

The utility model discloses a tunnel concrete supporting device, and relates to the technical field of tunnel supporting. The tunnel concrete supporting device comprises a first spraying steel fiber concrete plate, a connecting mechanism is arranged on one side of the first spraying steel fiber concrete plate, and a yielding structure is arranged in the connecting mechanism. According to the tunnel concrete supporting device, by arranging the first spraying steel fiber concrete plate and the yielding structure, the lining adopts the first spraying steel fiber concrete plate and the yielding structure, the yielding structure achieves flexibility of the lining structure in the early stage of deformation, steel fiber concrete achieves rigidity of the lining structure in the later stage of deformation, and combined use is achieved; and the supporting principle of soft first and then rigid and rigid-soft combination is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel support, and in particular relates to a tunnel concrete support device. Background Art

[0002] Steel fiber concrete lining is a tunnel support structure that uses steel fiber concrete as a support material. In tunnel support structures, steel fiber concrete has excellent tensile, bending, impact and crack resistance properties, and can effectively withstand the deformation pressure from the surrounding rock to maintain the stability and safety of the tunnel structure.

[0003] In practical engineering applications, sprayed steel fiber concrete is mostly used to form an integrated lining structure. However, the deformation capacity of steel fiber sprayed concrete lining is limited. Although it has a strong bearing capacity, it cannot cope with the large deformation that may occur in the supporting structure, causing cracking and deformation of the lining or even instability and damage. This restricts the application of steel fiber concrete lining in the support and control of large deformation of soft rock tunnels. Based on the existing technical deficiencies, the utility model designs a tunnel concrete support device. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides a tunnel concrete supporting device, which enables the tunnel lining to have the bearing characteristics of early flexibility and later rigidity.

[0005] To achieve the above object, the utility model provides the following technical solutions: a tunnel concrete support device, comprising a sprayed steel fiber concrete plate, a connection mechanism is provided on one side of the sprayed steel fiber concrete plate, and a pressure relief structure is provided inside the connection mechanism;

[0006] The pressure-releasing structure comprises a rubber block, a plate groove, a steel plate and a spring. The rubber block is arranged on one side of a sprayed steel fiber concrete plate. A plate groove is opened on one side of the rubber block. A steel plate is arranged on one side of the rubber block. A spring is arranged on one side of the steel plate.

[0007] As a preferred technical solution for a tunnel concrete support device of the utility model, a side plate is fixedly connected to one side of the sprayed steel fiber concrete block one, a sprayed steel fiber concrete block two is arranged on one side of the sprayed steel fiber concrete block one, and a side groove is opened on one side of the sprayed steel fiber concrete block two.

[0008] As a preferred technical solution of a tunnel concrete support device of the utility model, the connecting mechanism includes a protective sleeve, a pressure relief groove and a connecting plate. The protective sleeve is fixedly connected to one side of the side plate, a pressure relief groove is opened inside the protective sleeve, and the connecting plate is fixedly connected to one side of the second sprayed steel fiber concrete plate.

[0009] As a preferred technical solution of a tunnel concrete supporting device of the utility model, the rubber block is arranged inside the pressure relief groove, and the rubber block is arranged on one side of the connecting plate.

[0010] As a preferred technical solution of a tunnel concrete supporting device of the utility model, the steel plate is fixedly connected inside the plate groove, and the spring is arranged inside the pressure relief groove.

[0011] As a preferred technical solution of a tunnel concrete supporting device of the utility model, the side plate is slidably connected to one side of the side groove, and the side plate is slidably plugged into one side of the connecting plate.

[0012] As a preferred technical solution of a tunnel concrete support device of the utility model, the protective sleeve is slidably sleeved on the outer surface of the connecting plate, and the protective sleeve is arranged on one side of the side plate.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. When the utility model is in use, a sprayed steel fiber concrete plate and a yielding structure are arranged, and the lining adopts a sprayed steel fiber concrete plate and a yielding structure, so that the yielding structure realizes the flexibility of the lining structure, and the steel fiber concrete realizes the rigidity of the structure. The combined use realizes the support principle of first flexible and then rigid, and the combination of rigidity and flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a structural schematic diagram of a sprayed steel fiber concrete panel of the utility model;

[0017] Figure 2 This is a schematic diagram of the side groove structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the connection mechanism structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the rubber block structure of the utility model.

[0020] In the figure: 1. sprayed steel fiber concrete plate one; 101. side plate; 102. sprayed steel fiber concrete plate two; 103. side groove; 2. connecting mechanism; 201. protective cover; 202. pressure relief groove; 203. connecting plate; 3. pressure relief structure; 301. rubber block; 302. plate groove; 303. steel plate; 304. spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 The utility model provides the following technical solutions: a tunnel concrete support device, comprising a sprayed steel fiber concrete plate 1, a connection mechanism 2 is arranged on one side of the sprayed steel fiber concrete plate 1, and a pressure relief structure 3 is arranged inside the connection mechanism 2;

[0023] The pressure-releasing structure 3 includes a rubber block 301, a plate groove 302, a steel plate 303 and a spring 304. The rubber block 301 is arranged on one side of the sprayed steel fiber concrete plate 1, the plate groove 302 is opened on one side of the rubber block 301, the steel plate 303 is arranged on one side of the rubber block 301, and the spring 304 is arranged on one side of the steel plate 303.

[0024] A side plate 101 is fixedly connected to one side of the sprayed steel fiber concrete plate 1, a sprayed steel fiber concrete plate 2 102 is arranged on one side of the sprayed steel fiber concrete plate 1, and a side groove 103 is opened on one side of the sprayed steel fiber concrete plate 2 102.

[0025] The connecting mechanism 2 includes a protective sleeve 201, a pressure relief groove 202 and a connecting plate 203. The protective sleeve 201 is fixedly connected to one side of the side plate 101. The pressure relief groove 202 is opened inside the protective sleeve 201. The connecting plate 203 is fixedly connected to one side of the sprayed steel fiber concrete plate 102.

[0026] The rubber block 301 is disposed inside the pressure relief groove 202 , and the rubber block 301 is disposed on one side of the connecting plate 203 .

[0027] The steel plate 303 is fixedly connected inside the plate groove 302 , and the spring 304 is arranged inside the pressure relief groove 202 .

[0028] The side plate 101 is slidably connected to one side of the side groove 103 , and the side plate 101 is slidably plugged into one side of the connecting plate 203 .

[0029] The protective sleeve 201 is slidably sleeved on the outer surface of the connecting plate 203 , and the protective sleeve 201 is arranged on one side of the side plate 101 .

[0030] What needs to be further explained is that the lining adopts sprayed steel fiber concrete plate 1 and yield structure 3, so that the yield structure 3 realizes the flexibility of the lining structure, and the steel fiber concrete realizes the rigidity of the structure, and their combined use realizes the support principle of first flexible and then rigid, and a combination of rigidity and flexibility.

[0031] Working principle: When a tunnel concrete support device is used, firstly, the sprayed steel fiber concrete plate 1 and the sprayed steel fiber concrete plate 2 102 are set to be concrete mixed with an appropriate amount of steel fibers. After mixing an appropriate amount of steel fibers in ordinary concrete, the randomly distributed steel fibers can prevent the concrete from cracking, making it have excellent tensile resistance, bending resistance, impact resistance, fatigue resistance, anti-cracking and other characteristics;

[0032] A pressure-releasing structure 3 is provided between the sprayed steel fiber concrete plate 1 and the sprayed steel fiber concrete plate 2 102 through a connecting mechanism 2. The pressure-releasing structure 3 allows a large deformation to occur between the sprayed steel fiber concrete plate 1 and the sprayed steel fiber concrete plate 2 102. This deformation far exceeds the elastic deformation range of the structure, that is, when excavating a tunnel in a stratum with significant expansion and extrusion properties, a support structure and system with good deformation capacity is adopted. The surrounding rock continues to deform under the restriction of the support structure, so that the deformation energy stored in the surrounding rock can be continuously and gradually released, effectively reducing the surrounding rock pressure acting on the support structure, and ensuring that the deformation process is always in a controllable state and the surrounding rock does not undergo excessive relaxation and deformation. This support concept allows the formation of a plastic zone in the surrounding rock.

[0033] The lining adopts sprayed steel fiber concrete plate 1 and yield structure 3, so that the yield structure 3 realizes the flexibility of the lining structure, and the steel fiber concrete realizes the rigidity of the structure. The combined use realizes the support principle of first flexible and then rigid, and the combination of rigidity and flexibility.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above 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 utility model shall be included in the protection scope of the utility model.

Claims

1. A tunnel concrete support device, comprising a sprayed steel fiber concrete plate (1), characterized in that: A connection mechanism (2) is provided on one side of the sprayed steel fiber concrete plate (1), and a pressure relief structure (3) is provided inside the connection mechanism (2); A pressure-releasing structure (3), the pressure-releasing structure (3) comprising a rubber block (301), a plate groove (302), a steel plate (303) and a spring (304), the rubber block (301) being arranged on one side of a sprayed steel fiber concrete plate (1), the plate groove (302) being provided on one side of the rubber block (301), the steel plate (303) being provided on one side of the rubber block (301), and the spring (304) being provided on one side of the steel plate (303).

2. A tunnel concrete support device according to claim 1, characterized in that: A side plate (101) is fixedly connected to one side of the sprayed steel fiber concrete plate one (1), a sprayed steel fiber concrete plate two (102) is arranged on one side of the sprayed steel fiber concrete plate one (1), and a side groove (103) is opened on one side of the sprayed steel fiber concrete plate two (102).

3. A tunnel concrete support device according to claim 1, characterized in that: The connection mechanism (2) comprises a protective sleeve (201), a pressure relief groove (202) and a connection plate (203); the protective sleeve (201) is fixedly connected to one side of the side plate (101); a pressure relief groove (202) is provided inside the protective sleeve (201); and the connection plate (203) is fixedly connected to one side of the second sprayed steel fiber concrete plate (102).

4. A tunnel concrete support device according to claim 1, characterized in that: The rubber block (301) is arranged inside the pressure relief groove (202), and the rubber block (301) is arranged on one side of the connecting plate (203).

5. A tunnel concrete support device according to claim 1, characterized in that: The steel plate (303) is fixedly connected inside the plate groove (302), and the spring (304) is arranged inside the pressure relief groove (202).

6. A tunnel concrete support device according to claim 2, characterized in that: The side plate (101) is slidably connected to one side of the side groove (103), and the side plate (101) is slidably plugged into one side of the connecting plate (203).

7. A tunnel concrete support device according to claim 3, characterized in that: The protective sleeve (201) is slidably sleeved on the outer surface of the connecting plate (203), and the protective sleeve (201) is arranged on one side of the side plate (101).

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