A support structure with controllable compression deformation and construction method thereof

Abstract

The invention discloses a support structure with controllable pressure deformation and a construction method thereof, which relate to the technical field of tunnel support. The structure comprises a connecting component and at least two support components, wherein the connecting component is used to connect two adjacent support components, and the support components comprise a partition plate, a first honeycomb structure, a second honeycomb structure, an FRP shell, a plurality of mounting holes and a plurality of pipe bodies. The first honeycomb structure is filled with a high-water material, and the stiffness of the first honeycomb structure is different from that of the second honeycomb structure. When the tunnel roof / two sides are deformed, the first honeycomb structure will not be destroyed all at once, and the structure plays a role of continuous support. When the tunnel roof / two sides are greatly deformed, the structure can release energy. The first honeycomb structure and the second honeycomb structure are respectively arranged on both sides of the partition plate, and the FRP shell is wrapped around the outside of the first honeycomb structure and the second honeycomb structure. The support components are small in size, convenient for underground transportation and construction, and can effectively reduce the influence of small underground working space and difficult equipment scheduling.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel support, and in particular to a support structure with controllable pressure-yielding deformation and a construction method thereof. Background Art

[0002] As the main energy source in my country, coal has played a vital role in economic and social development. The western mining area has the characteristics of shallow coal seams, large thickness and new strata. The geological conditions of the coal-bearing strata are mainly weakly cemented strata of the Jurassic, Cretaceous and Paleogene periods, which greatly increases the difficulty and cost of supporting the roof of underground coal mine tunnels. The roof / two sides of soft rock tunnels are severely deformed and easy to become unstable. The existing "anchor net spraying" combined support method is a common support method for tunnels in my country, and it once achieved good support results. However, with the promotion of application, many shortcomings have gradually been exposed: inability to provide continuous support, inconvenient construction, etc., especially soft rock tunnels have put forward higher requirements for support strength. There is an urgent need to find and study continuous support technology with controllable yielding deformation to solve practical engineering problems. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a support structure with controllable pressure deformation and a construction method thereof, which can achieve continuous support, and the support components are small in size and convenient for underground transportation and construction.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a controllable compressive deformation support structure, comprising a connecting component and at least two support components, wherein the connecting component is used to connect two adjacent support components, and the support component comprises a partition plate, a first honeycomb structure, a second honeycomb structure, an FRP shell, a plurality of mounting holes and a plurality of tube bodies, wherein the first honeycomb structure is filled with a high-water material, the stiffness of the first honeycomb structure is different from the stiffness of the second honeycomb structure, the first honeycomb structure and the second honeycomb structure are respectively arranged on both sides of the partition plate, the FRP shell is wrapped around the outside of the first honeycomb structure and the second honeycomb structure, each of the mounting holes passes through the top surface of the FRP shell, the first honeycomb structure, the partition plate, the second honeycomb structure and the bottom surface of the FRP shell in sequence, and each of the tube bodies is interference-mounted in one of the mounting holes.

[0006] Preferably, the connecting component is an I-shaped connecting member, which includes a vertical plate and two horizontal plates respectively arranged perpendicularly at the upper and lower ends of the vertical plate, and two installation grooves are formed on both sides of the vertical plate, and the supporting component is used to be arranged in the installation grooves.

[0007] Preferably, the FRP shell is formed by wrapping a FRP cloth strip coated with glue around the outside of the first honeycomb structure and the second honeycomb structure.

[0008] Preferably, the FRP cloth strip is a carbon fiber cloth strip.

[0009] Preferably, the partition plate is a steel plate, and the tube body is a steel tube.

[0010] Preferably, the connecting component is an aluminum alloy connecting component.

[0011] The present invention also provides a construction method of a support structure based on controllable compression deformation, comprising the following steps:

[0012] Step 1: drill holes in the same position of the first honeycomb structure, the second honeycomb structure and the partition plate, and place the first honeycomb structure, the partition plate and the second honeycomb structure together in sequence;

[0013] Step 2: Install the pipe body at the drilled hole in step 1, and form a reserved anchor hole inside the pipe body;

[0014] Step 3: Use FRP cloth strips coated with glue to wrap around the top surface, bottom surface, left side surface, right side surface and rear side surface of the first honeycomb structure and the second honeycomb structure, and reserve holes corresponding to the position of the tube body on the top surface and the bottom surface;

[0015] Step 4: filling the first honeycomb structure with the high water content material;

[0016] Step 5: Wrapping the first honeycomb structure and the second honeycomb structure with an FRP cloth strip coated with glue around the front side surfaces to form the FRP shell;

[0017] Step 6: transport the support components underground, align the reserved anchor holes with the anchor holes pre-drilled on the well wall, and use the connecting components to splice the support components along the tunnel roof and the two side surfaces;

[0018] Step seven, the anchor passes through the reserved anchor hole and is anchored in the anchor hole on the well wall, a tray is installed on the side of the anchor located away from the well wall, and the tray is pressed against the support component by a nut, thereby applying a pre-tightening force to the anchor.

[0019] Preferably, the inner diameter of the tube body is larger than the diameter of the anchor.

[0020] Preferably, the anchor is an anchor rod or an anchor cable.

[0021] Compared with the prior art, the present invention has achieved the following technical effects:

[0022] The controllable pressure-yielding support structure of the present invention includes a connecting component and at least two support components. The connecting component is used to connect two adjacent support components. The first honeycomb structure and the second honeycomb structure are respectively arranged on both sides of the partition plate. The FRP shell is wrapped around the outside of the first honeycomb structure and the second honeycomb structure. The first honeycomb structure is filled with high-water material. The stiffness of the first honeycomb structure is different from that of the second honeycomb structure. When the tunnel roof / two sides are deformed, it will not be destroyed all at once, and it plays a role of continuous support. The first honeycomb structure, the second honeycomb structure and the high-water material can release energy when the tunnel roof / two sides are greatly deformed. After the support components are prefabricated on the ground, they are transported to the underground together with the connecting components. The support components are small in size, convenient for underground transportation and construction, and can effectively reduce the impact of small underground working space and difficult equipment scheduling. The support components are easy to splice through the connecting components, easy to operate, and fast in construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic structural diagram of a support structure with controllable compression deformation provided by the present invention;

[0025] Figure 2 A schematic structural diagram of a support component in a controllable compressive deformation support structure provided by the present invention;

[0026] Figure 3 A schematic diagram of assembling the controllable compression-deformable support structure provided by the present invention in a tunnel;

[0027] Figure 4 A schematic diagram of the local structure of the FRP shell in the controllable compression deformation support structure provided by the present invention;

[0028] Figure 5 A construction flow chart of the controllable compressive deformation support structure provided by the present invention.

[0029] Explanation of reference numerals: 100, controllable compressive deformation support structure; 1, support component; 11, first honeycomb structure; 12, second honeycomb structure; 13, partition plate; 14, high water-repellent material; 15, FRP shell; 151, FRP cloth strip; 16, pipe body; 17, reserved anchor hole; 2, connecting component; 3, anchor rod; 4, anchor cable; 5, tray. DETAILED DESCRIPTION

[0030] 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.

[0031] The purpose of the present invention is to provide a support structure with controllable pressure deformation and a construction method thereof, which can realize continuous support, and the support components are small in size and convenient for underground transportation and construction.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1-Figure 4 As shown, the present embodiment provides a controllable pressure-yielding support structure 100, comprising a connecting component 2 and at least two support components 1, wherein the connecting component 2 is used to connect two adjacent support components 1, and the support component 1 comprises a partition plate 13, a first honeycomb structure 11, a second honeycomb structure 12, an FRP shell 15, a plurality of mounting holes and a plurality of tubes 16, wherein the first honeycomb structure 11 is filled with a high-water-density material 14, and the high-water-density material 14 is used to improve the stress performance of the first honeycomb structure 11, and has a controllable pressure-yielding deformation effect, and the second honeycomb structure 12 is a honeycomb structure not filled with the high-water-density material 14, and the stiffness of the first honeycomb structure 11 is similar to that of the second honeycomb structure 12. The structure 12 has different stiffness. The first honeycomb structure 11 and the second honeycomb structure 12 are respectively arranged on both sides of the partition plate 13. The FRP shell 15 is wrapped around the outside of the first honeycomb structure 11 and the second honeycomb structure 12. The FRP shell 15 can play a supporting role when the tunnel roof / two sides are deformed while constraining the first honeycomb structure 11 and the second honeycomb structure 12. Each mounting hole passes through the top surface of the FRP shell 15, the first honeycomb structure 11, the partition plate 13, the second honeycomb structure 12 and the bottom surface of the FRP shell 15 in sequence. Each tube body 16 is interference installed in a mounting hole, and the inside of the tube body 16 is used to install anchors.

[0034] Specifically, the connecting component 2 is an I-shaped connecting member, which includes a vertical plate and two horizontal plates respectively arranged vertically at the upper and lower ends of the vertical plate. Two mounting grooves are formed on both sides of the vertical plate, and the supporting component 1 is used to be arranged in the mounting groove. The connecting component 2 in this embodiment is made of a high ductility material, which is convenient for the supporting component 1 to be installed in the mounting groove with interference fit, and can be bent and deformed when the tunnel roof is deformed, so as to prevent the connecting component 2 from falling off after the tunnel is deformed. In this specific embodiment, the connecting component 2 is an aluminum alloy connecting component.

[0035] Specifically, the FRP shell 15 is formed by wrapping the FRP cloth strips 151 coated with glue around the outside of the first honeycomb structure 11 and the second honeycomb structure 12. The FRP cloth strips 151 coated with glue are wrapped in a horizontal and vertical alternating manner. The FRP shell 15 in this embodiment is a rectangular shell.

[0036] In this specific embodiment, the FRP fabric strip 151 is a carbon fiber fabric strip.

[0037] In this specific embodiment, the partition plate 13 is a steel plate, and the tube body 16 is a steel tube.

[0038] like Figure 5 As shown, this embodiment also provides a construction method of a support structure 100 based on controllable compression deformation, comprising the following steps:

[0039] Step 1: drill holes in the same position of the first honeycomb structure 11, the second honeycomb structure 12 and the partition plate 13, and place the first honeycomb structure 11, the partition plate 13 and the second honeycomb structure 12 together in sequence, so that mounting holes are formed at the corresponding drilled holes after they are placed in sequence; specifically, place the first honeycomb structure 11, the partition plate 13 and the second honeycomb structure 12 in sequence from top to bottom.

[0040] Step 2: Install the tube body 16 at the drilled hole in step 1. A reserved anchor hole 17 is formed inside the tube body 16 to prevent the original structure from being damaged when the anchor is driven. Specifically, the outer diameter of the tube body 16 is the same as the inner diameter of the installation hole to achieve interference installation of the tube body 16.

[0041] Step 3: Use the FRP cloth strip 151 coated with glue to wrap around the top, bottom, left, right and rear sides of the first honeycomb structure 11 and the second honeycomb structure 12, and reserve holes corresponding to the position of the tube body 16 on the top and bottom surfaces, that is, except for one side of the cross-section of the first honeycomb structure 11 and the second honeycomb structure 12, the FRP cloth strip 151 coated with glue is wrapped, and the holes reserved on the top and bottom surfaces are used for the insertion and exit of anchors, that is, when wrapping the FRP cloth strip 151 coated with glue, prevent the reserved anchor hole 17 from being blocked. Use several layers of FRP cloth strips 151 to stick on the reserved holes on the top and bottom surfaces to strengthen the strength of the weak position of the FRP shell 15.

[0042] Step 4: Fill the first honeycomb structure 11 with a high water content material 14 .

[0043] Step 5: Use a FRP cloth strip 151 coated with glue to wrap it around the front side of the first honeycomb structure 11 and the second honeycomb structure 12 to form an FRP shell 15. That is, the unclosed side of the cross-section of the first honeycomb structure 11 and the second honeycomb structure 12 in step 3 is wrapped with the FRP cloth strip 151 coated with glue, and together with the other five sides, a complete FRP shell 15 is formed to achieve complete wrapping of the first honeycomb structure 11 and the second honeycomb structure 12.

[0044] Step six, transport the support component 1 underground, align the reserved anchor hole 17 with the anchor hole pre-drilled on the well wall, and use the connecting component 2 to splice the support component 1 along the tunnel roof and the two side surfaces. Specifically, when installing the support component 1, the first honeycomb structure 11 is set on the side close to the well wall.

[0045] Step seven, the anchor passes through the reserved anchor hole 17 and is anchored in the anchor hole on the well wall, a tray 5 is installed on the side of the anchor located away from the well wall of the support component 1, and the tray 5 is pressed against the support component 1 by a nut, thereby applying a pre-tightening force to the anchor.

[0046] In this specific embodiment, the inner diameter of the tube body 16 is larger than the diameter of the anchor. Specifically, the inner diameter of the tube body 16 is slightly larger than the diameter of the anchor.

[0047] In this specific embodiment, the anchoring member is an anchor rod 3 or an anchor cable 4 .

[0048] It can be seen that in this embodiment, the first honeycomb structure 11 and the second honeycomb structure 12 have different rigidities, and will not be destroyed all at once when the tunnel roof / two sides are deformed, and play a role of continuous support. The first honeycomb structure 11, the second honeycomb structure 12 and the high-water material 14 can release energy when the tunnel roof / two sides are greatly deformed, solving the problem of severe deformation and easy instability of the soft rock tunnel roof / two sides. After the support component 1 is prefabricated on the ground, it is transported to the underground together with the connecting component 2. The support component 1 is small in size, which is convenient for underground transportation and construction, and can effectively reduce the impact of the small underground working space and the difficulty of equipment scheduling. The support component 1 is easy to splice through the connecting component 2, which is easy to operate and fast in construction.

[0049] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A support structure with controllable compression deformation, characterized in that: It comprises a connecting component and at least two supporting components, wherein the connecting component is used to connect two adjacent supporting components, and the supporting component comprises a partition plate, a first honeycomb structure, a second honeycomb structure, an FRP shell, a plurality of mounting holes and a plurality of tube bodies, wherein the first honeycomb structure is filled with a high-water material, the stiffness of the first honeycomb structure is different from that of the second honeycomb structure, the first honeycomb structure and the second honeycomb structure are respectively arranged on both sides of the partition plate, the FRP shell is wrapped around the outside of the first honeycomb structure and the second honeycomb structure, each of the mounting holes passes through the top surface of the FRP shell, the first honeycomb structure, the partition plate, the second honeycomb structure and the bottom surface of the FRP shell in sequence, and each of the tube bodies is interference-mounted in one of the mounting holes; the connecting component is an I-shaped connecting piece, and the I-shaped connecting piece comprises a vertical plate and two horizontal plates respectively arranged vertically at the upper and lower ends of the vertical plate, two mounting grooves are formed on both sides of the vertical plate, and the supporting component is used to be arranged in the mounting grooves.

2. The support structure with controllable compression deformation according to claim 1 is characterized in that: The FRP shell is formed by wrapping a FRP cloth strip coated with glue around the outside of the first honeycomb structure and the second honeycomb structure.

3. The support structure with controllable compression deformation according to claim 2 is characterized in that: The FRP cloth strip is a carbon fiber cloth strip.

4. The support structure with controllable compression deformation according to claim 1, characterized in that: The partition plate is a steel plate, and the tube body is a steel tube.

5. The support structure with controllable compression deformation according to claim 1, characterized in that: The connecting component is an aluminum alloy connecting component.

6. A construction method of a support structure with controllable compression deformation according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: drill holes in the same position of the first honeycomb structure, the second honeycomb structure and the partition plate, and place the first honeycomb structure, the partition plate and the second honeycomb structure together in sequence; Step 2: Install the pipe body at the drilled hole in step 1, and form a reserved anchor hole inside the pipe body; Step 3: Use FRP cloth strips coated with glue to wrap around the top surface, bottom surface, left side surface, right side surface and rear side surface of the first honeycomb structure and the second honeycomb structure, and reserve holes corresponding to the position of the tube body on the top surface and the bottom surface; Step 4: filling the first honeycomb structure with the high water content material; Step 5: Wrapping the first honeycomb structure and the second honeycomb structure with an FRP cloth strip coated with glue around the front side surfaces to form the FRP shell; Step 6: transport the support components underground, align the reserved anchor holes with the anchor holes pre-drilled on the well wall, and use the connecting components to splice the support components along the tunnel roof and the two side surfaces; Step seven, the anchor passes through the reserved anchor hole and is anchored in the anchor hole on the well wall, a tray is installed on the side of the anchor located away from the well wall, and the tray is pressed against the support component by a nut, thereby applying a pre-tightening force to the anchor.

7. The construction method of the support structure with controllable compression deformation according to claim 6 is characterized in that: The inner diameter of the tube body is greater than the diameter of the anchoring piece.

8. The construction method of the support structure with controllable compression deformation according to claim 6 is characterized in that: The anchoring member is an anchor rod or an anchor cable.

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