Apparatus for detecting embedment depth of roof bolt sleeve

A technology for embedment depth and conduction detection, which is applied in the direction of foundation structure testing, construction, foundation structure engineering, etc., can solve the problem of lack of tools for measuring the embedment depth of sleeves, and achieve convenient construction, save construction time, and simple operation Effect

Inactive Publication Date: 2012-08-08
CHONGQING URBAN CONSTR HLDG GRP +1
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  • Abstract
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Problems solved by technology

[0005] The present invention intends to provide a device for detecting the embedment depth of the bolt ...

Method used

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  • Apparatus for detecting embedment depth of roof bolt sleeve
  • Apparatus for detecting embedment depth of roof bolt sleeve

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Experimental program
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Embodiment 1

[0015] The specific structures and characteristics known in the following schemes will not be described here. In embodiment one:

[0016] The first is the erection of the slope anchor hole drilling platform frame. The drill bit of the drilling rig is debugged according to the designed anchor hole position layout on the drilling platform frame, and aligned with the drilling interface. Generally, the angle between the anchor hole drill pipe and the horizontal is 15 degrees. After drilling to a certain depth, pull out the drill bit, then put the first sleeve on the drill bit, adjust the position, push the first sleeve into the drilled anchor hole with the drill bit, continue drilling, and drill to a certain depth , and then pull out the drill bit, put the second sleeve on the drill bit, and connect with the first sleeve (it can be pre-processed according to different lengths, and the joints between the sleeves can be connected in the form of wire connection or other forms. ), an...

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Abstract

The invention provides an apparatus for detecting embedment depth of a roof bolt sleeve to solve a problem of lack of special tools in the prior art. The apparatus comprises a gauge rod. The head end of the gauge rod is provided with a main contact which is connected with an auxiliary contact through a conduction path. A power supply and a conduction detection apparatus are arranged on the conduction path. In application, the apparatus is slowly put into the embedded sleeve. If the conduction detection apparatus changes to an off condition, it indicates that the main contact exceeds the sleeve. The state turning point of the conduction detection apparatus is found, and then embedment depth of the sleeve can be measured by detecting the length of the insulated gauge rod. Compared with the conventional method for detecting the embedment depth of the sleeve, the method has the advantages of simple operation, accurate data measurement, construction time saving, and convenient, fast, and inexpensive construction.

Description

technical field [0001] The invention relates to a device for detecting the embedding depth of a bolt sleeve. Background technique [0002] Geotechnical engineering slope support At present, in many cases in our country, the technology of shotcrete with anchor rod and reinforced mesh is used to ensure the stability of geotechnical slope. In the area where the rock mass is loose at the beginning of drilling, the sleeve is generally driven into the casing along with the drilling, and the penetration depth of the sleeve should reach the relatively hard and complete rock formation. The main function of the sleeve is to prevent the bolt hole (soil and rock broken section) from collapsing during drilling and bolt construction. [0003] In geotechnical engineering design, the penetration depth or length of the sleeve cannot generally be given, it should be determined according to the geological conditions, and how to control and detect the length of the sleeve during the constructi...

Claims

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Application Information

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IPC IPC(8): E02D33/00
Inventor 陈能才危接来徐国庆于海祥张忠卫
Owner CHONGQING URBAN CONSTR HLDG GRP
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