Yield supporting structure

Abstract

The utility model provides a yielding supporting structure. The yielding supporting structure comprises a yielding assembly, a protection assembly and a connecting assembly. The protection assembly is used for preventing the normal use of the yielding assembly from being influenced by external environmental factors; the connecting assembly is used for being connected with an external structure. The yielding assembly comprises a press-in pipe and a pressure resisting pipe. When one end of the press-in pipe is pressed into the pressure resisting pipe, the press-in pipe and the pressure resisting pipe extrude each other, and a supporting effect is achieved. The yielding support structure provided by the utility model is different from the characteristics of'strong support and hard top 'of the traditional support, has the effect of yielding energy absorption under the condition of providing certain support resistance, can release the energy of surrounding rocks, and ensures the safe use of the support structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel engineering construction, and specifically relates to a yielding support structure, and more specifically, a yielding support structure suitable for multi-point positions of a steel arch frame of a large deformation tunnel. Background Art

[0002] With the development of engineering construction, more and more tunnel construction problems are troubling construction personnel. Tunnel large deformation disasters with characteristics such as poor surrounding rock properties, difficult support, and long-lasting surrounding rock deformation are urgent problems that need to be solved, involving the safety of tunnel use and the safety of people's lives.

[0003] In the prior art, a series of methods to release surrounding rock stress, such as advanced drilling, advanced small pilot pits, etc., or to improve support strength, such as using high-strength rigid support, increasing the spraying thickness of shotcrete, etc., can alleviate the impact of large deformation on tunnel safety to a certain extent. However, the prior art still has the problem that the energy inside the surrounding rock cannot be released and the support is still under great pressure. Utility Model Content

[0004] The utility model aims to provide a pressure-yielding support structure, aiming to solve the technical problem in the prior art that the internal energy of the surrounding rock cannot be released and the support is still subjected to relatively large pressure.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a pressure-yielding support structure, including:

[0006] Pressure-releasing components, protection components and connection components;

[0007] The protection component is used to prevent the normal use of the pressure-releasing component from being affected by external environmental factors;

[0008] The connecting assembly is used to connect with an external structure;

[0009] The pressure-releasing assembly includes a pressure-in tube and a pressure-blocking tube. When one end of the pressure-in tube is pressed into the pressure-blocking tube and mutual extrusion occurs between the pressure-in tube and the pressure-blocking tube, a supporting effect is played.

[0010] Preferably, the push-in tube is composed of multiple tube segments enclosed together; the pressure-blocking tube is composed of multiple tube segments enclosed together; and the thicknesses of the tube segments are different; the shape and size of the tube segments used in the push-in tube are compatible with the shape and size of the tube segments used in the pressure-blocking tube.

[0011] Preferably, the number of tube segments of the pressure-injection tube is the same as the number of tube segments of the pressure-blocking tube.

[0012] Preferably, the thickness of the segment used for the press-in pipe is at least two types.

[0013] Preferably, the press-in pipe is of a b-A-b structure composed of segment A, the first segment b, and the second segment b; wherein, the wall thicknesses of the first segment b and the second segment b are the same; the wall thickness of segment A is greater than the wall thickness of the first segment b.

[0014] Preferably, one end of the press-in pipe is provided with a guiding structure for guiding the press-in pipe to be inserted into the pressure-resistant pipe;

[0015] For the top plate, the guiding structure is an inclined surface structure, and the inclined surface is arranged at one end of the press-in pipe for being pressed into the pressure-resistant pipe.

[0016] Preferably, the protection assembly includes: a first sleeve sleeved outside the press-in pipe and a second sleeve sleeved outside the pressure-resistant pipe; the first sleeve is movably connected to the second sleeve; the outer wall of the first sleeve is embedded inside the inner wall of the second sleeve.

[0017] Preferably, the connection assembly includes a structural main body; and connection positions provided on the structural main body for establishing a connection relationship with an external structure.

[0018] Preferably, the structural main body includes a connecting plate, the connecting plate is connected to the yielding assembly and / or the protection assembly, side plates are respectively arranged on both sides of the connecting plate, and the side plates are perpendicular to the connecting plate; a plurality of the connection positions are respectively arranged on each side plate.

[0019] The beneficial effects of the yielding support structure provided by the present invention are as follows: Compared with the prior art, the yielding support structure of the present invention can solve the problem that the internal energy of the surrounding rock of a large-deformation tunnel cannot be released. A yielding support concept is proposed that combines a certain "compressive resistance" that can play a supporting role and a "yielding" that releases a part of the internal pressure of the surrounding rock to balance the state of the surrounding rock and protect the safety of the tunnel. Different from the characteristics of traditional support of "strong support and hard roof", this yielding support structure has the function of yielding and absorbing energy while providing a certain support resistance, can release the energy of the surrounding rock, and ensure the safe use of the support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1Structural schematic diagram of a yielding support structure provided by an embodiment of the present utility model;

[0022] Figure 2 Stereoscopic structural schematic diagram of a pressing-in pipe adopted by the structure of a yielding support structure provided by an embodiment of the present utility model;

[0023] Figure 3 Stereoscopic structural schematic diagram of a pressure-blocking pipe adopted by a yielding support structure provided by an embodiment of the present utility model;

[0024] Figure 4 Structural schematic diagram of a guiding structure adopted by a yielding support structure provided by an embodiment of the present utility model;

[0025] Figure 5 Structural composition schematic diagram of a pressure-blocking pipe adopted by a yielding support structure provided by an embodiment of the present utility model;

[0026] Figure 6 Structural composition schematic diagram of a pressing-in pipe adopted by a yielding support structure provided by an embodiment of the present utility model.

[0027] In the figure: 1, connection position; 2, structural main body; 3, first sleeve; 4, second sleeve; 5, pressing-in pipe; 6, guiding structure; 7, pressure-blocking pipe. Detailed implementation manners

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] Existing yielding support structures can achieve yielding under the condition of providing a certain support resistance, or yielding under different grades of support resistance. However, in actual engineering, the axial forces at different positions of the steel arch are different. Therefore, a yielding support structure with a single resistance cannot be adapted to each position of the steel arch. The present utility model provides a yielding support structure applicable to multiple positions of the steel arch in large-deformation tunnels, aiming to provide a yielding support structure with different grades of yielding resistance and adjustable on-site, so that it can provide a matching support resistance for yielding at each position of the steel arch.

[0030] Please refer to Figures 1 to 6, a yielding support structure provided by the present utility model will be described hereinafter. The yielding support structure includes a yielding component, a protection component, and a connection component. Among them, connection components are respectively provided at both ends of the yielding component. The yielding component includes a pressing-in pipe 5 and a pressure-blocking pipe 7. The pressing-in pipe 5 and the pressure-blocking pipe 7 correspond to each other and can provide resistance while being pressed in. When the pressing-in pipe 5 is pressed into the pressure-blocking pipe 7, and mutual extrusion occurs between the pressing-in pipe 5 and the pressure-blocking pipe 7, a supporting effect is achieved. The protection component is connected to the yielding component. The protection component is used to protect the yielding component to prevent the normal use of the yielding component from being affected by external environmental factors (such as concrete), and to ensure the normal function of the yielding component. The connection component is used to connect to an external structure.

[0031] As a specific implementation manner of an embodiment of the present utility model, please refer to Figures 1 to 6 , the pressing-in pipe 5 is composed of multiple pipe segments; the thicknesses of the pipe segments used for the pressing-in pipe 5 are at least two types. Specifically, the pressing-in pipe 5 is composed of three pipe segments; more specifically, the adjacent pipe segments are connected end to end and the multiple pipe segments enclose to form a pipe body structure, and the pipe segment thicknesses of the pressing-in pipe 5 are two thicknesses of A, b, and b. The pressure-blocking pipe 7 is composed of multiple pipe segments; specifically, the adjacent pipe segments are connected end to end and the multiple pipe segments enclose to form a pipe body structure. The thicknesses between the pipe segments are different. More specifically, the pressure-blocking pipe segments of the pressure-blocking pipe 7 are composed of three thicknesses of E, F, and G. Among them, to ensure smooth pressing-in, when G > F > E, b = E, and G ≥ A ≥ F is most appropriate.

[0032] In this embodiment, the number of pipe segments of the pressing-in pipe 5 is the same as the number of pipe segments of the pressure-blocking pipe 7. For example, Figure 5 and Figure 6 In the exemplary embodiment shown, the number of pipe segments of the pressing-in pipe 5 and the pressure-blocking pipe 7 is three. Among them, the pressing-in pipe 5 is a b-A-b type structure composed of a pipe segment A with a larger wall thickness and two pipe segments b with the same wall thickness (i.e., the first pipe segment b and the second pipe segment b). The pressure-blocking pipe 7 is an E-F-G type structure composed of pipe segments E, F, and G with different wall thicknesses.

[0033] In this embodiment, a guiding structure 6 is provided on the pressing-in pipe 5. Specifically, the guiding structure 6 is provided at one end of the pressing-in pipe 5 for pressing in the pressure-resistant pipe 7. The provision of the guiding structure 6 can facilitate the accurate and rapid connection of the pressing-in pipe 5 with the pressure-resistant pipe 7. It should be noted that the structure of the guiding structure 6 is not unique, as long as it can play a guiding role when the pressing-in pipe 5 is pressed into the pressure-resistant pipe 7. Specifically, the guiding structure 6 can be one or more of an inclined surface structure, an inclined angle structure, and a chamfer structure. More specifically, the guiding structure 6 is an inclined surface structure, and the inclined surface is provided at one end of the pressing-in pipe 5 for pressing into the pressure-resistant pipe 7. More specifically, the inclined surface is provided on the segment A and / or the first segment b and / or the second segment b. Preferably, the inclined surfaces are respectively provided on the segment A, the first segment b, and the second segment b.

[0034] As a specific implementation manner of the embodiment of the present utility model, please refer to Figures 1 to 3 together. The protection assembly includes a first sleeve 3 sleeved outside the pressing-in pipe 5 and a second sleeve 4 sleeved outside the pressure-resistant pipe 7. The first sleeve 3 is movably connected to the second sleeve 4. Specifically, the outer wall of the first sleeve 3 is embedded inside the inner wall of the second sleeve 4. The protection assembly can prevent the internal pressure-relieving part from being affected by the external concrete, protect the internal pressure-relieving part from functioning, and at the same time provide resistance to resist bias pressure.

[0035] In this embodiment, one end of the first sleeve 3 is connected to the pressing-in pipe 5. That is, the first sleeve 3 and the pressing-in pipe 5 are of an integral structure. One end of the second sleeve 4 is connected to the pressure-resistant pipe 7. That is, the second sleeve 4 and the pressure-resistant pipe 7 are of an integral structure. For example, Figure 2 and Figure 3 In the exemplary embodiments shown, the length dimension of the first sleeve 3 is the same as the length dimension of the pressing-in pipe 5. The length dimension of the second sleeve 4 is the same as the length dimension of the pressure-resistant pipe 7. Specifically, one end of the first sleeve 3 is flush with one end of the pressing-in pipe 5. The other end of the first sleeve 3 is connected to the other end of the pressing-in pipe 5. One end of the second sleeve 4 is flush with one end of the pressing-in pipe 5. The other end of the second sleeve 4 is connected to the other end of the pressing-in pipe 5. The outer diameter dimension of the first sleeve 3 is the same as the inner diameter dimension of the second sleeve 4, and the outer wall of the first sleeve 3 can be embedded inside the inner wall of the second sleeve 4.

[0036] As a specific implementation manner of the embodiment of the present utility model, please refer to Figures 1 to 6, connection components for connecting with external structures are respectively provided at both ends of the yielding component or / and the protection component. That is, connection components for connecting with external structures can be respectively provided at both ends of the yielding component. Or, connection components for connecting with external structures can be respectively provided at both ends of the protection component. Or, the connection component is connected to both the yielding component and the protection component simultaneously. The connection component includes a structural body 2; a connection position 1 for establishing a connection relationship with an external structure is provided on the structural body 2. Specifically, as Figure 1 In the exemplary embodiment shown, the structural body 2 includes a connecting plate which is connected to the yielding component or / and the protection component. Side plates are respectively provided on both sides of the connecting plate and are perpendicular to the connecting plate; a plurality of connection positions 1 are respectively provided on each side plate. More specifically, the connection position 1 is a bolt hole structure, which functions to connect the main body of the yielding component to the steel arch.

[0037] One end of the first sleeve 3 is tightly connected (such as welded) with a set of connection components. One end of the second sleeve 4 is tightly connected with a set of connection components. And they are respectively connected to the steel arch as a whole through the connection positions 1 provided on the structural body 2. When the connection position 1 is a bolt hole, the connection relationship between the structural body 2 and the steel arch is a bolt connection.

[0038] When the steel arch supports the rock mass, the internal axial force is transmitted to the yielding component through the connection component and the sleeve component. The pressure tube 5 in the yielding component generates resistance through mutual extrusion with the pressure-resistant tube 7, which can play a certain supporting role.

[0039] When a large deformation disaster occurs in the tunnel, the internal energy of the rock mass is large, and the surrounding rock pressure acting on the steel arch increases. The yielding component of the present invention starts to play a role. When the pressure is transmitted to the yielding component, the pressure tube 5 is gradually pressed into the pressure-resistant tube 7 through the pressure guiding part 6. During this process, the structure of the present invention can still provide a certain resistance, ensuring the stability of the yielding structure and preventing the overall steel arch from losing its supporting ability due to local deformation.

[0040] The yielding component of the present invention provides a yielding resistance transformation design that can be completed on the construction site, that is, the wall thickness b - A - b structure of the pressure tube 5 and the wall thickness E - F - G structure of the pressure-resistant tube 7. During the assembly of the structure of the present invention on the construction site, different wall thicknesses of the pressure-resistant tube corresponding to the larger wall thickness A of the pressure tube can be used to flexibly adjust the resistance of the yielding structure, which enables the yielding structure of the present invention to be applicable to multiple positions of the steel arch for yielding.

[0041] The yielding support structure provided by the present utility model can, compared with the prior art, solve the problem that the internal energy of the surrounding rock of a large-deformation tunnel cannot be released. A yielding support concept is proposed, which combines "compressive resistance" that can play a certain supporting role with "yielding" that releases a part of the internal pressure of the surrounding rock to balance the state of the surrounding rock and protect the safety of the tunnel. Different from the characteristics of traditional support of "strong support and hard roof", this yielding support structure has the function of yielding and energy absorption while providing a certain support resistance, which can release the energy of the surrounding rock. At the same time, a single component can meet the yielding requirements at different positions of the steel arch. That is, a single component has three resistance distributions, and one component can be applied to different positions of the steel arch, ensuring the safe use of the support structure.

[0042] The foregoing are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A yield support structure, characterized in that: include: Pressure-releasing components, protection components and connection components; The protection component is used to prevent the normal use of the pressure-releasing component from being affected by external environmental factors; The connecting assembly is used to connect with an external structure; The pressure-releasing assembly includes a pressure-in tube and a pressure-blocking tube. When one end of the pressure-in tube is pressed into the pressure-blocking tube and mutual extrusion occurs between the pressure-in tube and the pressure-blocking tube, a supporting effect is played.

2. A pressure-yielding support structure according to claim 1, characterized in that: The push-in tube is composed of multiple tube segments; the pressure-blocking tube is composed of multiple tube segments; and the thicknesses of the tube segments are different; the shape and size of the tube segments used in the push-in tube are compatible with the shape and size of the tube segments used in the pressure-blocking tube.

3. A pressure-yielding support structure as claimed in claim 2, characterized in that: The number of tube segments of the pressure-injection tube (5) is the same as the number of tube segments of the pressure-blocking tube (7).

4. A pressure-yielding support structure as claimed in claim 3, characterized in that: The tube segments used in the press-in tube (5) have at least two thicknesses.

5. A pressure-yielding support structure as claimed in claim 4, characterized in that: The press-in tube (5) is a bAb type structure consisting of a tube segment A and a first tube segment b and a second tube segment b; wherein the wall thickness of the first tube segment b and the second tube segment b are the same; and the wall thickness of the tube segment A is greater than the wall thickness of the first tube segment b.

6. The pressure-yielding support structure according to claim 3, characterized in that: The push-in tube (5) is provided with a guiding structure (6) at one end thereof for guiding the push-in tube (5) to be inserted into the pressure-blocking tube (7).

7. A pressure-yielding support structure as claimed in claim 6, characterized in that: The guide structure (6) is an inclined surface structure, and the inclined surface is arranged on one end of the pressing tube (5) for pressing into the pressure-blocking tube (7).

8. The pressure-yielding support structure according to claim 1, characterized in that: The protection assembly comprises: a first sleeve (3) sleeved outside the push-in tube (5) and a second sleeve (4) sleeved outside the pressure-blocking tube (7); the first sleeve (3) and the second sleeve (4) are movably connected; and the outer wall of the first sleeve (3) is embedded inside the inner wall of the second sleeve (4).

9. The pressure-yielding support structure according to claim 1, characterized in that: The connection component comprises a structural body (2); and a connection position (1) arranged on the structural body (2) and used to establish a connection relationship with an external structure.

10. A pressure-yielding support structure as claimed in claim 9, characterized in that: The structural body (2) comprises a connecting plate, the connecting plate is connected to the pressure-releasing component and / or the protection component, and side plates are respectively provided on both sides of the connecting plate, and the side plates are perpendicular to the connecting plate; each side plate is respectively provided with a plurality of the connecting positions (1).

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