Flexible supporting device for tunnel construction

Abstract

A flexible supporting device for tunnel construction belongs to the technical field of tunnel engineering supporting and comprises a honeycomb supporting piece and anchor rods, the honeycomb supporting piece is composed of a plurality of sets of bent edge vertical plates, bent middle vertical plates, top and bottom connecting plates and transverse partition steel plates, and four sets of connecting structures are arranged on the outer surface of the honeycomb supporting piece. Anchoring structures are arranged on the two sides of the top of the honeycomb supporting piece. A plurality of groups of honeycomb supporting pieces are annularly arranged on the edge of the tunnel surrounding rock for anchoring through the honeycomb supporting pieces, then a honeycomb-shaped protection plate is formed by a bent edge vertical plate, a bent middle vertical plate, a top and bottom connecting plate and a transverse separation steel plate, and the honeycomb shape can improve the effective compression displacement of the whole honeycomb supporting pieces, so that the permissible deformation of the surrounding rock is improved to a certain extent; the stress of the surrounding rock is further released, the load borne by the supporting structure is reduced, the supporting stability is improved, and the supporting structure is suitable for being adopted in tunnels with large surrounding rock deformation and large surrounding rock internal pressure.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel engineering support, in particular to a flexible support device for tunnel construction. Background Art

[0002] Tunnels are engineering structures buried in the ground, and are a form of human use of underground space. Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels, mining tunnels, and military tunnels. The tunnel conference held by the Organization for Economic Cooperation and Development in 1970 combined various factors and defined tunnels as: "a cavern with a cross-sectional area greater than 2 square meters built in any way under the ground for a certain purpose and in a specified shape and size". During the construction of existing tunnel projects, when the tunnel structure passes through weak rock layers and broken zones, the surrounding rock deforms greatly during the excavation process, causing damage to the support structure or overall stability problems. The existing coping methods are mostly to enhance the supporting force of the lining structure, such as adopting an "anchor-injection integrated" support system, a prestressed anchor cable method, and a double-layer primary support method. However, practice shows that the above methods cannot effectively solve the problem of large deformation of tunnels by increasing the lining support force to resist the deformation of the surrounding rock. Rigid support usually does not have sufficient flexibility to adapt to the continuous deformation of the surrounding rock, especially under long-term action, it is easy to crack or other forms of damage. Based on the existing technical deficiencies, the present invention designs a flexible support device for tunnel construction. Summary of the invention

[0003] The present invention provides a flexible support device for tunnel construction, which has the advantages of reducing tunnel structure stress and improving support stability, and solves the problems mentioned in the above background technology.

[0004] The present invention provides the following technical solution: a flexible support device for tunnel construction, comprising a honeycomb support member and an anchor rod, wherein the honeycomb support member is composed of a plurality of groups of bent edge vertical plates, bent middle vertical plates, top and bottom connecting plates, and transverse steel plates, and the outer surface of the honeycomb support member is provided with four groups of connecting structures, and anchoring structures are provided on both sides of the top of the honeycomb support member.

[0005] As a preferred technical solution of the present invention, the four groups of connection structures include two fixing seats, two fixing plates and two fixing blocks, and the two fixing seats are fixed on the inner wall of the honeycomb support member.

[0006] As a preferred technical solution of the present invention, a first locking screw is fixedly installed on one end of one of the fixing seats, and a moving screw is installed on the internal thread of the other fixing seat.

[0007] As a preferred technical solution of the present invention, a first engaging screw groove is provided inside the movable screw rod, and a turning handle is fixedly mounted on one end of the outer surface of the movable screw rod.

[0008] As a preferred technical solution of the present invention, the two fixing plates are fixed to the outer surface of the honeycomb support member by bolts, and a pull-out box is fixedly installed inside the two fixing plates.

[0009] As a preferred technical solution of the present invention, a pull-out plate is slidably mounted inside the pull-out box, and a pull handle is fixedly mounted on one side of the outer surface of the pull-out plate.

[0010] As a preferred technical solution of the present invention, the two fixing blocks are fixed to the outer surface of the honeycomb support member, and the two fixing blocks are fixed to the pull-out plate by bolts.

[0011] As a preferred technical solution of the present invention, the two anchoring structures include pads, the tops of the two pads are rotatably mounted with rotating shafts, and connecting pipes are fixedly mounted inside the two rotating shafts.

[0012] As a preferred technical solution of the present invention, a second engaging screw groove is opened inside the two connecting tubes, a third engaging screw groove is opened on the outer surface of the two connecting tubes, and engaging thread rings are threadedly installed on the outer surface of the two third engaging screw grooves.

[0013] As a preferred technical solution of the present invention, a second locking screw is fixedly installed at one end of the bottom of the anchor rod, and a third locking screw is fixedly installed at the junction of the anchor rod and the second locking screw.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. A flexible support device for tunnel construction, through honeycomb support parts, after arranging multiple groups of honeycomb support parts in a circumferential direction and anchoring them at the tunnel surrounding rock edge, a honeycomb guard plate is formed by bending side vertical plates, bending middle vertical plates, top and bottom connecting plates, and transverse diaphragm steel plates. The honeycomb shape can improve the effective compression displacement of the honeycomb support parts as a whole, which is beneficial to improve the allowable deformation of the surrounding rock to a certain extent, so that the surrounding rock stress is further released, the load on the support structure is reduced, and the stability of the support is improved. It is suitable for use in tunnels with large surrounding rock deformation and large surrounding rock internal pressure; 2. A flexible support device for tunnel construction, through a connection structure, when arranging honeycomb support members, align the first engaging screw grooves of two groups of honeycomb support members with the first locking screw, and then unscrew the screws on the four groups of fixing blocks, and then pull the pull handle to retract the pull-out plate into the pull-out box. At this time, the construction personnel put their hands into the honeycomb support member, and rotate the handle to rotate and move the movable screw inside the fixing seat forward, so that the first engaging screw groove and the first locking screw can be close to each other, and the first locking screw can be sleeved inside the first engaging screw groove and locked, so that it is convenient to quickly connect the arrangement of two or more rows of honeycomb support members, improve the overall support effect of the tunnel, and at the same time, it is simple to operate and easy to maintain; 3. This kind of flexible support device for tunnel construction uses an anchoring structure and an anchor rod. When fixing the honeycomb support component on the surface of the surrounding rock, the upper end of the anchor rod is driven into the surrounding rock, and then the second locking screw is engaged and fixed with the second engaging screw groove by aligning the second engaging screw groove with the second locking screw and rotating the connecting pipe. At this time, the third locking screw is tightly attached to the second engaging screw groove, and the engaging thread ring is rotated to be located in the middle position between the third locking screw and the third engaging screw groove, thereby allowing the anchor rod and the honeycomb support component to be quickly disassembled and fixed, and the double engagement improves the anchoring strength of the device, avoiding the situation where it is difficult to disassemble and maintain after traditional welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the appearance structure of the present invention; Figure 2 This is a schematic diagram of the structure of the bent edge vertical plate of the present invention; Figure 3 This is a schematic diagram of the first engaging screw groove structure of the present invention; Figure 4 This is a schematic diagram of the structure of the drawer box of the present invention; Figure 5 It is a schematic diagram of the anchoring structure of the present invention; Figure 6 This is a schematic diagram of the third engaging screw groove structure of the present invention; Figure 7 It is a schematic plan view of the layout of the present invention.

[0016] In the figure: 1. Honeycomb support member; 101. Bent edge vertical plate; 102. Bent middle vertical plate; 103. Top and bottom connecting plates; 104. Horizontal partition steel plate; 2. Connecting structure; 21. Fixed seat; 22. First locking screw; 23. Moving screw; 24. First bite screw groove; 25. Turning handle; 26. Fixed plate; 27. Pull-out box; 28. Pull-out plate; 29. ​​Pull handle; 210. Fixed block; 3. Anchoring structure; 31. Pad; 32. Rotating shaft; 33. Connecting pipe; 34. Second bite screw groove; 35. Third bite screw groove; 36. Biting threaded ring; 4. Anchor rod; 41. Second locking screw; 42. Third locking screw. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-7A flexible support device for tunnel construction includes a honeycomb support member 1 and an anchor rod 4. The honeycomb support member 1 is composed of multiple groups of bent edge vertical plates 101, bent middle vertical plates 102, top and bottom connecting plates 103, and transverse diaphragm steel plates 104. Four groups of connecting structures 2 are arranged on the outer surface of the honeycomb support member 1, and anchoring structures 3 are arranged on both sides of the top of the honeycomb support member 1.

[0019] See also Figure 2-4 The four sets of connection structures 2 include two fixed seats 21, two fixed plates 26 and two fixed blocks 210. The two fixed seats 21 are fixed to the inner wall of the honeycomb support 1. A first locking screw 22 is fixedly installed at one end of one of the fixed seats 21, and a moving screw 23 is installed on the internal thread of the other fixed seat 21. A first engaging screw groove 24 is provided inside the moving screw 23, and a turning handle 25 is fixedly installed on one end of the outer surface of the moving screw 23. The two fixed plates 26 are fixed to the outer surface of the honeycomb support 1 by bolts, and a pull-out box 27 is fixedly installed inside the two fixed plates 26. A pull-out plate 28 is slidably installed inside the pull-out box 27, and a pull handle 29 is fixedly installed on one side of the outer surface of the pull-out plate 28. The two fixed blocks 210 are fixed to the outer surface of the honeycomb support 1, and the two fixed blocks 210 are fixed to the pull-out plate 28 by bolts.

[0020] Align the first engaging grooves 24 of the two groups of honeycomb support members 1 with the first locking screw 22, and then unscrew the screws on the four groups of fixing blocks 210, and then pull the handle 29 to retract the pull-out plate 28 into the pull-out box 27. At this time, the construction personnel put their hands into the honeycomb support members 1, and turn the handle 25 to make the movable screw 23 rotate and move forward inside the fixing seat 21, so that the first engaging groove 24 can be close to the first locking screw 22, and the first locking screw 22 can be put into the first engaging groove 24 and locked, thereby facilitating the quick connection of the arrangement of two or more rows of honeycomb support members 1.

[0021] See also Figure 5-6 The two anchoring structures 3 include backing plates 31, and the tops of the two backing plates 31 are rotatably mounted with rotating shafts 32, and the insides of the two rotating shafts 32 are fixedly mounted with connecting tubes 33. The insides of the two connecting tubes 33 are provided with second bite screw grooves 34, and the outer surfaces of the two connecting tubes 33 are provided with third bite screw grooves 35, and the outer surfaces of the two third bite screw grooves 35 are threadedly mounted with bite thread rings 36. The bottom end of the anchor rod 4 is fixedly mounted with a second locking screw 41, and the intersection of the anchor rod 4 and the second locking screw 41 is fixedly mounted with a third locking screw 42.

[0022] When the honeycomb support component 1 is fixed on the surface of the surrounding rock, the upper end of the anchor rod 4 is driven into the surrounding rock, and then the second engaging groove 34 is aligned with the second locking screw 41 and the connecting tube 33 is rotated to make the second locking screw 41 engage and fix with the second engaging groove 34. At this time, the third locking screw 42 is tightly attached to the second engaging groove 34, and the engaging threaded ring 36 is rotated to make it located in the middle position between the third locking screw 42 and the third engaging groove 35, so that the anchor rod 4 and the honeycomb support component 1 can be quickly disassembled and fixed.

[0023] Working principle: when a flexible support device for tunnel construction is used, first drive the upper end of the anchor rod 4 into the surrounding rock, then align the second engaging groove 34 with the second locking screw 41 and rotate the connecting tube 33 to make the second locking screw 41 engage and fix with the second engaging groove 34. At this time, the third locking screw 42 is tightly attached to the second engaging groove 34, and the engaging threaded ring 36 is rotated to make it located in the middle position between the third locking screw 42 and the third engaging groove 35, thereby the anchor rod 4 and the honeycomb support member 1 can be quickly fixed. Then, when connecting multiple rows of honeycomb support members 1, align the first engaging grooves 24 of the two groups of honeycomb support members 1 with the first locking screws 22, and then unscrew the screws on the four groups of fixing blocks 210. At this time, pull the handle 29 to make the pull plate 28 is retracted into the pull-out box 27. At this time, the construction worker puts his hand into the honeycomb support component 1, and rotates the handle 25 to make the movable screw 23 rotate and move forward inside the fixed seat 21, so that the first engaging screw groove 24 can be close to the first locking screw 22, and the first locking screw 22 is inserted into the first engaging screw groove 24 and locked, thereby completing the overall work of the tunnel support. During the construction process, a honeycomb guard plate is formed by bending the side vertical plate 101, the bent middle vertical plate 102, the top and bottom connecting plates 103, and the cross diaphragm steel plate 104. The honeycomb shape can increase the effective compression displacement of the honeycomb support component 1 as a whole, which is beneficial to increase the allowable deformation of the surrounding rock to a certain extent, so that the surrounding rock stress can be further released, the load on the support structure can be reduced, and the stability of the support can be improved.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible support device for tunnel construction, comprising a honeycomb support member (1) and an anchor rod (4), characterized in that: The honeycomb support member (1) is composed of a plurality of groups of bent edge vertical plates (101), bent middle vertical plates (102), top and bottom connection plates (103), and transverse steel plates (104); four groups of connection structures (2) are arranged on the outer surface of the honeycomb support member (1); and anchoring structures (3) are arranged on both sides of the top of the honeycomb support member (1).

2. A flexible support device for tunnel construction according to claim 1, characterized in that: The four groups of connection structures (2) include two fixing seats (21), two fixing plates (26) and two fixing blocks (210), and the two fixing seats (21) are fixed on the inner wall of the honeycomb support member (1).

3. A flexible support device for tunnel construction according to claim 2, characterized in that: A first locking screw (22) is fixedly mounted on one end of one of the fixing seats (21), and a moving screw (23) is mounted on the inner thread of the other fixing seat (21).

4. A flexible support device for tunnel construction according to claim 3, characterized in that: A first engaging screw groove (24) is provided inside the movable screw rod (23), and a turning handle (25) is fixedly mounted on one end of the outer surface of the movable screw rod (23).

5. A flexible support device for tunnel construction according to claim 2, characterized in that: The two fixing plates (26) are fixed to the outer surface of the honeycomb support member (1) by means of bolts, and a drawer box (27) is fixedly installed inside the two fixing plates (26).

6. A flexible support device for tunnel construction according to claim 5, characterized in that: A pull-out plate (28) is slidably mounted inside the pull-out box (27), and a pull handle (29) is fixedly mounted on one side of the outer surface of the pull-out plate (28).

7. A flexible support device for tunnel construction according to claim 2, characterized in that: The two fixing blocks (210) are fixed to the outer surface of the honeycomb support member (1), and the two fixing blocks (210) are fixed to the pull-out plate (28) via bolts.

8. A flexible support device for tunnel construction according to claim 1, characterized in that: The two anchoring structures (3) comprise pads (31), the tops of the two pads (31) are rotatably mounted with rotation shafts (32), and the interiors of the two rotation shafts (32) are fixedly mounted with connecting pipes (33).

9. A flexible support device for tunnel construction according to claim 8, characterized in that: The two connecting tubes (33) are provided with a second engaging screw groove (34) inside, the two connecting tubes (33) are provided with a third engaging screw groove (35) on the outer surface, and engaging thread rings (36) are threadedly mounted on the outer surfaces of the two third engaging screw grooves (35).

10. A flexible support device for tunnel construction according to claim 1, characterized in that: A second locking screw (41) is fixedly mounted on one end of the bottom of the anchor rod (4), and a third locking screw (42) is fixedly mounted at the junction of the anchor rod (4) and the second locking screw (41).

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