Post-grouting pressure type anchor rod and construction method thereof

A pressure type, anchor rod technology, applied in the engineering field, can solve the problems of high total price, difficult to guarantee construction quality, complicated grouting process and tension locking process, etc., so as to improve the compressive strength, reduce the construction cost and shorten the anchorage Effect of rod length

Active Publication Date: 2014-07-23
WUHAN SURVEYING GEOTECHN RES INST OF MCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its special structure, this type of pressure anchor makes the grouting process and tension locking process m

Method used

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  • Post-grouting pressure type anchor rod and construction method thereof
  • Post-grouting pressure type anchor rod and construction method thereof
  • Post-grouting pressure type anchor rod and construction method thereof

Examples

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Embodiment Construction

[0036] according to figure 1 , figure 2 , image 3 As shown, a post-grouting pressure anchor rod includes: a tie rod 1, the end of the tie rod 1 is provided with a threaded joint, the threaded joint passes through the tie rod hole on the bearing plate 3, and is fixed by a threaded sleeve 4, the lower part of the tie rod 1 A grouting body 2 is provided;

[0037] The tie rod 1 is a strip-shaped tensionable part, generally a steel bar or a steel strand;

[0038] Described grouting body 2 is made up of common grouting body 21 and post-pressing grouting body 22 of different materials, and common grouting body 21 is conventional concrete mortar, and post-pressing grouting body 22 is high molecular polymer mixed mortar, and grouting body 21 grouting through the grouting pipe 5, and the back grouting body 22 is grouted through the back grouting pipe 6;

[0039] The post-press grout 22 includes: epoxy emulsion, curing agent, cement, filler;

[0040] The bearing plate 3 is fixed a...

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PUM

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Abstract

The invention discloses a post-grouting pressure type anchor rod which comprises a pull rod (1). The tail end of the pull rod (1) is provided with a threaded joint which penetrates through a pull rod hole in a bearing plate (3) and is fixed through a threaded casing pipe (4). The lower portion of the pull rod (1) is provided with a grouting body (2). The post-grouting pressure type anchor rod has the advantages that due to the fact that a post-grouting body has the functions of permeating, separating, filling, compacting and solidifying the bottom end and the side wall of the grouting body, the compressive strength of the bottom end of the grouting body is improved; due to the fact that the post-grouting body is made of macromolecule material polymer concrete (mortar) which is high in strength and binding force and resistant to water permeating, the problem that the bearing force of the bottom end of the grouting body is insufficient is solved; due to the fact that the shearing bond stress between the macromolecule material polymer concrete (mortar) and a peripheral soil (rock) layer is larger than that of a common grouting material, under the same design bearing force condition, the length of the anchor rod is reduced, and construction cost is reduced.

Description

technical field [0001] The invention relates to the technical field of engineering, in particular to a post-grouting pressure anchor rod and a construction method thereof. Background technique [0002] In the foundation pit and slope engineering, underground engineering, mining engineering, and building uplift design involved in geotechnical engineering, a main support technology for strengthening the stratum is the use of bolts. According to the different stress states during grouting, anchors can be divided into tension anchors and pressure anchors. [0003] The steel bars (steel strands) of the tension anchor are directly bonded to the grouting body, and the grouting body in the anchorage section is in a state of tension during work, which is prone to tensile cracks and has poor anti-corrosion performance. [0004] The steel bar (steel strand) of the pressure type anchor is not bonded to the grouting body. When the anchor is under tension, the tension is directly transm...

Claims

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Application Information

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IPC IPC(8): E02D5/74E21D20/02E21D21/00
Inventor 余敦猛张艳军凌飞余火忠姜清华黄静
Owner WUHAN SURVEYING GEOTECHN RES INST OF MCC
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