Supporting structure for tunnel construction

Abstract

The utility model discloses a tunnel construction supporting structure which comprises a first hollow rod body and a second hollow rod body, the first hollow rod body is provided with a first end and a second end, and the first end of the first hollow rod body is connected with the second hollow rod body through a connecting assembly; a resin cartridge is arranged in the first hollow rod body; the connecting assembly is used for axially limiting the second hollow rod body before the first end of the first hollow rod body reaches the bottom of the anchor hole, and when the first end of the first hollow rod body reaches the bottom of the anchor hole, the second hollow rod body breaks through axial limiting of the connecting assembly under the action of external force; the second hollow rod body breaks through the axial limit of the connecting assembly, then stretches into the first hollow rod body and extrudes the resin cartridge in the first hollow rod body into the anchor hole. The resin cartridge is arranged in the first hollow rod body, so that the resin cartridge is prevented from being influenced by factors such as an anchor hole and the like, and the resin cartridge can be fed into a specified anchoring position in the anchor hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel construction technical field, especially a tunnel construction support structure. BACKGROUND

[0002] Tunnel initial support is mainly used for hanging net, anchoring operation to reinforce the rock wall of the tunnel after excavating the tunnel, preventing the loose and falling of the gravel from hurting personnel or equipment. The anchoring technology used in the anchoring operation is roughly divided into mechanical type, bonding type and mixed type according to the anchoring mode, wherein the resin cartridge is needed to bond the rod body and the hole wall together for providing anchoring force in the bonding type and the mixed type. The existing construction process generally puts the resin cartridge into the hole first, and then sends the anchor rod.

[0003] However, in the use process, due to the factors such as the non-standard straightness of the anchor hole (the hole is not straight), the large friction between the resin cartridge and the anchor hole, the softness of the resin cartridge itself and the poor directivity, it is difficult to send the resin cartridge to the designated anchoring position, and the resin cartridge is easy to break due to friction during the sending process. INVENTION CONTENTS

[0004] The utility model aims at overcoming the defects of the prior art, providing a tunnel construction support structure, which sets the resin cartridge in the first hollow rod body, avoids the influence of the anchor hole and other factors, and ensures that the resin cartridge can be sent to the designated anchoring position in the anchor hole.

[0005] The utility model aims at overcoming the defects of the prior art, providing a tunnel construction support structure, which sets the resin cartridge in the first hollow rod body, avoids the influence of the anchor hole and other factors, and ensures that the resin cartridge can be sent to the designated anchoring position in the anchor hole.

[0006] A tunnel construction support structure, comprising a first hollow rod body and a second hollow rod body, the first hollow rod body has a first end and a second end, the first end of the first hollow rod body and the second hollow rod body are connected through a connecting assembly;

[0007] The first hollow rod body is provided with a resin cartridge;

[0008] The connecting assembly is used for axially limiting the second hollow rod body before the first end of the first hollow rod body reaches the bottom of the anchor hole, and the second hollow rod body breaks through the axial limitation of the connecting assembly under the action of external force when the first end of the first hollow rod body reaches the bottom of the anchor hole.

[0009] The second hollow rod body breaks through the axial limitation of the connecting assembly and extends into the first hollow rod body, and the resin cartridge in the first hollow rod body is extruded out of the anchor hole.

[0010] Further, the connecting assembly comprises a connecting sleeve and two arc-shaped expansion shell pieces, the connecting sleeve is provided with two symmetrical wedge-shaped guide platforms, the two expansion shell pieces are symmetrically arranged on the two sides of the wedge-shaped guide platforms, a triangular tapering groove is formed between the two expansion shell pieces, the wedge-shaped guide platforms extend into the tapering groove, the two expansion shell pieces form a structure capable of expanding or contracting in the radial direction, and the inner wall of the expansion shell piece is provided with a transverse block for axially limiting the second hollow rod body;

[0011] The end, away from the expansion shell piece, of the connecting sleeve is fixedly connected with the second end of the first hollow rod body in a coaxial mode;

[0012] The end of the second hollow rod body extends into the two expansion shell pieces and abuts against the transverse block;

[0013] The outer portions of the two expansion shell pieces are provided with elastic members for tensioning the expansion shell pieces.

[0014] Further, the elastic members are rubber bands.

[0015] Further, the first hollow rod body is internally provided with a blade for cutting a protective bag outside a resin charge when the resin charge is extruded.

[0016] Further, the first end of the first hollow rod body is provided with an anchoring head.

[0017] Further, the wedge-shaped guide platform and the connecting sleeve are in an integrated structure.

[0018] Further, the end, away from the first hollow rod body, of the second hollow rod body is provided with a backing plate and a nut.

[0019] The tunnel construction supporting structure has the advantages that:

[0020] The resin charge is arranged inside the first hollow rod body, so that the resin charge can be ensured to be sent into a specified anchoring position in the anchor hole without being affected by the anchor hole and other factors. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the tunnel construction supporting structure in the embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of the overall structure of the tunnel construction supporting structure in the embodiment of the utility model; Figure 1 It is an enlarged schematic diagram of the local part A;

[0023] Figure 3 It is an enlarged schematic diagram of the local part B; Figure 1 It is an enlarged schematic diagram of the local part B;

[0024] Figure 4 It is a perspective view of the connecting assembly;

[0025] Figure 5is a top view of the connecting assembly;

[0026] Figure 6 is Figure 5 is a cross-sectional view of the middle C-C;

[0027] In the figure, 1, the first hollow rod body; 2, the second hollow rod body; 3, the resin cartridge; 4, the connecting assembly; 5, the connecting sleeve; 6, the expansion shell piece; 7, the wedge-shaped guide table; 8, the shrinkage groove; 9, the transverse block; 10, the blade; 11, the backing plate; 12, the nut. DETAILED DESCRIPTION

[0028] The technical scheme of the utility model will be described below in conjunction with the embodiments, obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0029] Referring to Figures 1-6 , the utility model provides a technical scheme:

[0030] Embodiment:

[0031] As Figures 1-6 shown, a tunnel construction support structure, including first hollow rod body 1 and second hollow rod body 2, first hollow rod body 1 has first end and second end, and the first end of first hollow rod body 1 and second hollow rod body 2 are connected by connecting assembly 4;

[0032] As Figure 3 shown, the first hollow rod body 1 is provided with resin cartridge 3 and blade 10 for cutting resin cartridge 3, and the end of first hollow rod body 1 is provided with anchor head for guiding, and the anchor head is provided with resin extrusion hole;

[0033] Connecting assembly 4 is used to axially limit second hollow rod body 2 before the first end of first hollow rod body 1 reaches the bottom of anchor hole, and when the first end of first hollow rod body 1 reaches the bottom of anchor hole, second hollow rod body 2 breaks through the axial limitation of connecting assembly 4 under the action of external force;

[0034] After the second hollow rod body 2 breaks through the axial limitation of connecting assembly 4, it extends into first hollow rod body 1 and extrudes resin cartridge 3 in first hollow rod body 1 to anchor hole, and the tail of second hollow rod body 2 is provided with backing plate 11 and nut 12 for applying prestress to anchor rod.

[0035] As Figure 2 , Figure 4 and Figure 6As shown, the connecting assembly 4 comprises a connecting sleeve 5 and two arc-shaped expansion shell pieces 6, the connecting sleeve 5 is provided with two symmetrical wedge-shaped guide platforms 7, the size of the wedge-shaped guide platforms 7 gradually decreases from the first hollow rod body 1 to the second hollow rod body 2, the two expansion shell pieces 6 are symmetrically arranged on both sides of the wedge-shaped guide platforms 7, a triangular tapering groove 8 is formed between the two expansion shell pieces 6, the wedge-shaped guide platforms 7 extend into the tapering groove 8, the two expansion shell pieces 6 form a structure that can expand or contract in the radial direction, the inner wall of the expansion shell piece 6 is provided with a transverse block 9 for limiting the axial position of the second hollow rod body 2;

[0036] The end of the connecting sleeve 5 away from the expansion shell piece 6 is coaxially fixedly connected with the second end of the first hollow rod body 1;

[0037] One end of the second hollow rod body 2 extends into the two expansion shell pieces 6 and abuts against the transverse block 9;

[0038] The outer part of the two expansion shell pieces 6 is provided with an elastic member (not shown in the figure) for tensioning the expansion shell piece 6, and the elastic member is a rubber band.

[0039] Wherein, 1, two transverse blocks 9 are arranged, and a gap is arranged between the two transverse blocks 9 to ensure that the expansion shell piece 6 can be opened in the radial direction to form a gap for the second hollow rod body 2 to pass through.

[0040] Working principle: (1) Drill anchor hole, drill with drill and hole.

[0041] (2) Send anchor rod (the first hollow rod body 1, the connecting assembly 4 and the second hollow rod body 2 form the anchor rod as a whole): send the first hollow rod body 1, the connecting assembly 4 and the second hollow rod body 2 into the anchor hole until the first end of the first hollow rod body 1 is located at the bottom of the anchor hole. Due to the protection of the first hollow rod body 1, the resin cartridge 3 is not affected by the anchor hole and can smoothly reach the anchoring position. During the sending process, the second hollow rod body 2 cannot axially relatively displace with the first hollow rod body 1 due to the axial limiting of the transverse block 9.

[0042] (3) After the anchor rod is in place, an axial force is applied to the second hollow rod body 2, and under the action of the axial force, the first end of the first hollow rod body 1 abuts against the bottom of the anchor hole, so that the connecting sleeve 5 moves in the axial direction towards the second hollow rod body 2 under the reaction force of the first hollow rod body 1.

[0043] During this process, the wedge-shaped guide platform 7 on the connecting sleeve 5 extrudes the expansion shell piece 6, the expansion shell piece 6 is separated in the radial direction when extruded, the elastic member is stretched, and the transverse block 9 in the expansion shell piece 6 separates in the radial direction, the gap between the two transverse blocks 9 increases. When the gap increases to be greater than the outer diameter of the second hollow rod body, the transverse block 9 releases the axial limiting of the second hollow rod body 2.

[0044] At this time, the second hollow rod body 2 extends into the first hollow rod body 1 in the axial force, and the end of the second hollow rod body 2 extrudes the resin cartridge 3 after extending into the first hollow rod body 1, the resin cartridge 3 is cut by the blade 10 and then can be smoothly extruded to the anchor hole. In order to improve the anchoring effect of the resin cartridge 3 after extrusion, a mixer for stirring resin can be arranged in the first hollow rod body 1 and behind the rear end of the blade 10, and the mixer is a prior art which will not be described here.

[0045] The utility model discloses a resin cartridge is arranged in the first hollow rod body, avoids its influence by anchor hole and other factors, guarantees that it can send into the specified anchoring position in the anchor hole.

[0046] The above-mentioned is only the preferred implementation of the utility model, and it should be understood that the utility model is not limited to the form disclosed in the text, should not be regarded as the exclusion of other embodiments, and can be used in various other combinations, modifications and environments, and can be changed within the range of the concept described in the text by the above-mentioned teaching or the technology or knowledge of related fields. The change and variation of the person skilled in the art without departing from the spirit and scope of the utility model should be within the protection scope of the claims attached to the utility model.

Claims

1. A tunnel construction support structure, characterised in that: The utility model provides a kind of resin medicine package, including first hollow pole body and second hollow pole body, the first hollow pole body has first end and second end, and the first end of the first hollow pole body and the second hollow pole body are connected by connecting component between first end and second end; Resin medicine package is arranged in the first hollow pole body; The connecting component is used to axially limit the second hollow pole body before the first end of the first hollow pole body reaches the bottom of anchor hole, and the second hollow pole body breaks through the axial limitation of connecting component under external force when the first end of the first hollow pole body reaches the bottom of anchor hole; The second hollow pole body breaks through the axial limitation of connecting component and stretches into the first hollow pole body and extrudes resin medicine package in the first hollow pole body to anchor hole.

2. A tunnel construction support structure according to claim 1, characterised in that: The connecting component includes connecting sleeve and two arc-shaped expansion shell pieces, two symmetric wedge-shaped guide platforms are arranged on the connecting sleeve, two arc-shaped expansion shell pieces are symmetrically arranged on the two sides of wedge-shaped guide platform, a triangular tapering groove is formed between two arc-shaped expansion shell pieces, wedge-shaped guide platform extends into tapering groove, two arc-shaped expansion shell pieces form structure that can expand radially or stretch, and horizontal block for axially limiting the second hollow pole body is arranged on the inner wall of expansion shell piece; The end of connecting sleeve away from expansion shell piece is coaxially fixedly connected with the second end of the first hollow pole body; One end of the second hollow pole body extends into two arc-shaped expansion shell pieces and abuts against horizontal block; Elastic member for tensioning expansion shell piece is arranged outside two arc-shaped expansion shell pieces.

3. A tunnel construction support structure according to claim 2, wherein: The elastic member is rubber band.

4. The tunnel construction support structure of claim 2, wherein: Blade for cutting the protective bag outside resin medicine package when extruding resin medicine package is arranged in the first hollow pole body.

5. The tunnel construction support structure of claim 2, wherein: Anchor head is arranged on the first end of the first hollow pole body.

6. The tunnel construction support structure of claim 2, wherein: Wedge-shaped guide platform and connecting sleeve are integrated structure.

7. The tunnel construction support structure of claim 2, wherein: Pad and nut are arranged on the end of the second hollow pole body away from the first hollow pole body.

Images