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A self-drilling self-locking bolt and its installation method

A self-locking, anchor technology, which is applied in excavation, construction, infrastructure engineering, etc., can solve the problems that the pullout force of the anchor is difficult to achieve, the length of the anchor section is reduced, and the reinforcement effect is not ideal, so as to reduce the project cost. and construction difficulty, increase the pull-out resistance, and improve the effect of reinforcement

Active Publication Date: 2022-03-25
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is: in view of the existing technology, when using mortar bolts or self-drilling bolts to reinforce the slope engineering, it is easy to cause the borehole to collapse, the anchorage section is too long, or the pullout force of the bolt is difficult to reach the design value , the problem of unsatisfactory reinforcement effect, provides a self-drilling self-locking anchor and its installation method, which can effectively solve the problem of hole collapse, increase the tensile force of the anchor, and effectively reduce the length of the anchor section. Significantly reduce the project cost and construction difficulty, and improve the overall reinforcement effect of the slope

Method used

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  • A self-drilling self-locking bolt and its installation method
  • A self-drilling self-locking bolt and its installation method
  • A self-drilling self-locking bolt and its installation method

Examples

Experimental program
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Effect test

Embodiment 1

[0060] like Figure 1-8 As shown, a self-drilling and self-locking anchor system described in this embodiment includes a borehole 9 arranged in the reinforcement body 4 and a self-drilling and self-locking anchor rod arranged along the axis of the borehole 9. The outer end of the self-drilling and self-locking anchor rod forms an anchor connection with the reinforcement body 4 through a self-locking thorn 31. Specifically, the self-drilling and self-locking anchor rod includes a drill bit 1, a hollow anchor rod body 2, a hollow self-locking belt from the inside to the outside. The connecting sleeve 3 of the puncture, the front end of the anchor body 2 is connected to the drill bit 1, and the rear end exposes the drilling hole, the backing plate 5, the rod body nut 6, the positioning guide rod 7 with the tenon 71, and the guide rod nut 8, which are hollow. The anchor body 2 is connected with the drill bit 1 and the coupling sleeve 3 through a threaded interface to form a whole,...

Embodiment 2

[0074] like Figure 1-8 As shown, an installation method described in this embodiment is used to form the self-drilling and self-locking anchor system described in Embodiment 1, comprising the following steps:

[0075] S1. Install the tenon 71 on the positioning guide rod 7;

[0076] S2. Set the anchor body 2 on the outside of the positioning guide rod 7, install the drill bit 1 at the end of the anchor body 2, and thread the drill bit 1 with the positioning guide rod 7 ;

[0077] S3 . Install the coupling sleeve 3 at a predetermined position on the anchor body 2 , and install the self-locking protrusion 31 on the coupling sleeve 3 .

[0078] The installation method described in this embodiment effectively realizes the assembly of the self-drilling and self-locking bolt described in the present invention. The assembly process is simple, controllable, and the construction difficulty is low, which greatly improves the overall reinforcement effect of the slope.

Embodiment 3

[0080] like Figure 1-8 As shown, the construction method disclosed in this embodiment is used to form the self-drilling and self-locking anchor system described in the application, including the following steps:

[0081]A1. Install and form the self-drilling and self-locking anchor rod described in Embodiment 1 according to the installation method described in Embodiment 2, and put the opening part 312 into the thrusting groove 34;

[0082] A2. Utilize the self-drilling and self-locking anchor rod to perform drilling 9 on the reinforcement body 4, and install the backing plate 5, the rod body nut 6 and the guide rod nut 8, wherein,

[0083] The guide rod nut 8 is threadedly matched with the positioning guide rod 7, and the guide rod nut 8 can abut against the end of the anchor rod body 2 away from the drill bit 1;

[0084] A3. After performing the drilling 9 to a predetermined depth, twist the rod body nut 6 so that the backing plate 5 and the surface of the reinforcing body...

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Abstract

The present invention relates to the field of civil engineering, in particular to a self-drilling and self-locking bolt and its installation method, wherein the self-drilling and self-locking bolt includes a positioning guide rod; the hollow anchor body is sleeved on the positioning guide The outside of the rod; the drill bit is connected to one end of the anchor body; the tenon is arranged on the positioning guide rod; the self-locking thrust is arranged on the anchor body and is configured such that the tenon moves away from the drill bit and can be pushed Self-locking thrusts to open the self-locking thrusts. The self-drilling and self-locking bolt of this application effectively solves the problem of hole collapse. The self-locking thorns are opened under the action of the positioning guide rod and pierced into the reinforcement body, which not only increases the tensile force of the bolt, but also forms a support The function of the anchor rod ensures that the grouting body is evenly distributed between the anchor rod and the reinforcement body. After the self-locking thorn is locked, it can increase the pull-out resistance of the anchor rod, effectively reduce the length of the anchor segment, and reduce the project cost and construction difficulty. , which improves the overall reinforcement effect of the slope.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a self-drilling and self-locking bolt and an installation method thereof. Background technique [0002] When the soil is loose gravel soil, rocky soil or sand layer, when using conventional mortar anchors or self-drilling anchors to reinforce the slope engineering, it is easy to cause the borehole to collapse, the anchorage section is too long or the anchor is pulled out. The force is difficult to reach the design value, resulting in poor economy of the entire reinforcement project and unsatisfactory reinforcement effect. Contents of the invention [0003] The purpose of the present invention is: in view of the existence of the prior art, when using mortar bolts or self-drilling bolts to reinforce the slope engineering, it is easy to cause the borehole to collapse, the anchorage section is too long, or the pullout force of the bolt is difficult to reach the design value , the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/20E02D5/80
CPCE02D5/80E02D17/207
Inventor 薛海洋赵青海杨利梅万波周璐潘柄安叶世斌姚裕春李安洪于洋徐鹏李婧悦曾强吴菲丁周旭胡雄飞
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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