CN203626867U

CN203626867U - Bag grouting anchor device

Info

Publication number: CN203626867U
Application number: CN201320781968.3U
Authority: CN
Inventors: 李辉; 闫海丰; 陈晓祥; 李超; 王新伟; 岳志奇
Original assignee: Henan University of Technology
Current assignee: Henan University of Technology
Priority date: 2013-12-03
Filing date: 2013-12-03
Publication date: 2014-06-04
Anticipated expiration: 2023-12-03

Abstract

The utility model discloses a bag grouting anchor device. An annular expansion bag is sleeved at each of the front end and the rear end of an anchor rod; the area between the annular expansion bags front and back is of a grouting gap; a first grouting pipe is respectively communicated with the inner cavities of the annular expansion bags front and back; a second grouting pipe is communicated in the grouting gap. The anchor rod is fixed by the mode of grouting at two times, and two ends of the anchor rod can be effectively sealed by the grouting at the first time, so the grout is favorably pressurized during the grouting at the second time, and the high-pressure grout goes deep into a floppy coal bed to form a steady structure. The anchor effect is improved, the operation is simple and fast and the bag grouting anchor device is very suitable for promotion and application.

Description

Pocket type slip casting anchor device

Technical field

The utility model relates to anchor pole technique for fixing in field, colliery, is specifically related to a kind of pocket type slip casting anchor stock fastening devices.

Background technology

In the technical field of colliery, anchor pole application is very extensive, and the fixed form of existing anchor pole is after boring, anchor rod body to be packed in boring in coal seam, then cement paste or cement mortar are poured in the space between the body of rod and boring and are carried out anchoring by Grouting Pipe.Existing anchor pole technology is for soft coal level can not guarantee to be in the milk plumpness and the integrality of body; Hole in weak seam boring is large, and Anchor Agent lost efficacy, and firmly anchoring lacks radial compression effect for the large rockburst of compressive strain when being in the milk, can weaken the bonding frictional strength between anchoring body and coal seam.In a word, in above-mentioned bad ground, adopt current anchor structure pattern all can seriously reduce anchor uplift resistance, anchoring effect is poor, and the long-term safety reliability of engineering is suffered damage.

Utility model content

The purpose of this utility model is cannot be securely to the fixing problem and shortage of anchor pole for weak seam in field, existing colliery, provide one can be fast, anchor pole fastening devices reliably.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of pocket type slip casting anchor device, comprise anchor pole and Grouting Pipe, overlap respectively intrinsic annular expanding bag at the forward and backward two ends of anchor pole, the region between forward and backward annular expanding bag is slip casting gap; The first Grouting Pipe is communicated in respectively in forward and backward annular expanding bag inner chamber, and the grouting port of the first Grouting Pipe is positioned at anchor pole end; The second Grouting Pipe is communicated in the slip casting gap between forward and backward annular expanding bag; The grouting port of the second Grouting Pipe is positioned at anchor pole end.In the first Grouting Pipe, be provided with one way valve.Described one way valve is arranged on the grouting port position of the first Grouting Pipe, or is arranged on the grout outlet position in forward and backward annular expanding bag.

The beneficial effects of the utility model are: the utility model is fixed anchor pole by twice grouting mode, slip casting for the first time can be carried out effective sealing to anchor pole two ends, thereby while being conducive to slip casting be for the second time conducive to slurries to pressurize, make high pressure slurries go deep into weak seam depths, form robust structure.The first Grouting Pipe can be injected cheap material, such as water or gas or ordinary Portland cement etc.The second Grouting Pipe can be injected cement or Anchor Agent etc.Reach material and rationally utilize, avoid waste.It is fixing afterwards in expansion that one way valve is conducive to forward and backward expanding bag, forms hermetically-sealed construction.The utility model adopts pocket type slip casting anchoring, can improve anchoring effect, simple and quick, is applicable to very much promotion and implementation.

Accompanying drawing explanation

Fig. 1 is one of structural representation of the present utility model;

Fig. 2 is two of structural representation of the present utility model.

In figure, label 1 is anchor pole, and 2 is rear annular expanding bag, and 3 is front annular expanding bag, and 4 is the first Grouting Pipe, and 5 is one way valve, and 6 is the second Grouting Pipe, and 7 is coal seam, and 8 is slip casting gap, and 9 is grouting port.

The specific embodiment

Embodiment 1: referring to Fig. 1, the first pocket type slip casting anchor device is to overlap respectively intrinsic front annular expanding bag 3 and rear annular expanding bag 2 at the forward and backward two ends of anchor pole 1, maintains slip casting gap, one end 8 between forward and backward annular expanding bag.Forward and backward annular expanding bag is communicated with the first Grouting Pipe 4 respectively, and slip casting gap 8 is communicated with the second Grouting Pipe 6.

The grouting port 9 of the first Grouting Pipe 4 is positioned at anchor pole 1 end, and the first Grouting Pipe 4 is communicated in respectively in forward and backward annular expanding bag inner chamber.In the present embodiment, in the first Grouting Pipe 4, be provided with one way valve 5, this one way valve 5 is arranged on the grout outlet position in forward and backward annular expanding bag.

Embodiment 2: referring to Fig. 2, the second pocket type slip casting anchor device is substantially the same manner as Example 1, different: one way valve 5 is arranged on the position of the grouting port 9 of the first Grouting Pipe 4.

Embodiment 3: accompanying drawing is not drawn, content is substantially the same manner as Example 1, different: one way valve is not set in the first Grouting Pipe, in use, only needs to keep the first Grouting Pipe to have enough pressure so that forward and backward annular expanding bag struts.When the second Grouting Pipe is to after injecting slurries in slip casting gap and solidifying, can be no longer to the first Grouting Pipe pressure testing.

Claims

1. a pocket type slip casting anchor device, comprises anchor pole and Grouting Pipe, it is characterized in that: overlap respectively intrinsic annular expanding bag at the forward and backward two ends of anchor pole, the region between forward and backward annular expanding bag is slip casting gap; The first Grouting Pipe is communicated in respectively in forward and backward annular expanding bag inner chamber, and the grouting port of the first Grouting Pipe is positioned at anchor pole end; The second Grouting Pipe is communicated in the slip casting gap between forward and backward annular expanding bag; The grouting port of the second Grouting Pipe is positioned at anchor pole end.

2. pocket type slip casting anchor device according to claim 1, is characterized in that: in the first Grouting Pipe, be provided with one way valve.

3. pocket type slip casting anchor device according to claim 2, is characterized in that: described one way valve is arranged on the grouting port position of the first Grouting Pipe, or is arranged on the grout outlet position in forward and backward annular expanding bag.