A pin timbering process and sectionalized hollow mud injecting stay bolt thereof

A technology of bolt support and grouting bolt, which is applied in the installation of bolts, earthwork drilling, mining equipment, etc., can solve the problems of affecting the service life, small anchoring force, and not suitable for strata that need rapid support. , to improve the reliability and durability, the grouting body is full and uniform, and the effect of avoiding single applicability

Inactive Publication Date: 2003-12-31
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: 1) It is difficult to guarantee the fullness of the slurry, and because of the deviation phenomenon when inserting the steel bar, the thickness of the steel bar protective layer is not easy to be uniform, and the anchoring force is not large
Corrosion and destruction of steel bars
2) At the same time, because prestressing cannot be implemented, the grouting body cracks with the deformation of the steel bar, so that water vapor directly invades the steel bar, affecting the service life
3) Not suitable for broken ground
4) Since the bolt support force is formed afte...

Method used

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  • A pin timbering process and sectionalized hollow mud injecting stay bolt thereof
  • A pin timbering process and sectionalized hollow mud injecting stay bolt thereof
  • A pin timbering process and sectionalized hollow mud injecting stay bolt thereof

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Experimental program
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Embodiment Construction

[0037] Such as figure 1 It is an elevation view of the bolt installed in the stratum after adopting the bolt support method of the present invention. figure 2 The utility model relates to a segmented hollow grouting anchor adopted in the bolt support method of the present invention. The anchor rod of the present invention is composed of a solid rod body 2 at the front end and a hollow rod body 6 at the rear. The hollow rod body 6 and the solid rod body 2 are combined through a connecting sleeve 4 . There are several centering devices 5; the connecting sleeve 4 and the cavity 18 of the hollow rod body 6 are provided with a lateral channel 14; the support plate 10, the nut 8, the washer 9 are matched with the end of the hollow rod body 6; A hole 13 is provided on the supporting backing plate 10, and the pipeline 7 passes through the hole 13.

[0038] The bolting method adopted in the present invention: drill a hole 1 in the stratum with a drilling machine and clean the drill ...

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PUM

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Abstract

The present invention is anchor support method and one kind of sectional hollow grouted anchor and has the features of first early strengthening locking and then grouting protection and prestressing. The sectional hollow grouted anchor consists of two sections including front solid rod and back hollow rod connected via connecting sleeve, the connecting sleeve has mortar blocking unit and hollow rod section has several centralizing units. There are side hole canal in the joint of the connecting sleeve and the hollow rod and hole canal in the support cushion for some pipe to pass through. The said anchor support method of the present invention is used for temporary and permanent fast support in both hard and weak rock formation conditions.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering anchoring support. The invention relates to a prestressed bolt support method and a segmented hollow grouting bolt, which are suitable for stratum structure support in underground engineering, mining engineering, foundation pit and slope engineering, and the like. Background technique [0002] In the process of underground engineering, mining engineering, foundation pit and slope engineering involved in geotechnical engineering, in order to prevent the formation from deforming, collapsing or destabilizing and endangering safety, a main support technology for strengthening the formation is to use bolts. The formation is strengthened by the high-strength tensile capacity of the bolt installed in the formation and the dense combination between the bolt and the grouting body around the anchor and the formation, so as to improve the integrity of the formation an...

Claims

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Application Information

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IPC IPC(8): E21D20/00E21D21/00
Inventor 吴德兴
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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