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Pre-stressed anchor rod support anchoring device and method

A technology of bolt support and anchoring method, which is applied in the direction of installation of bolts, earthwork drilling, sheet pile walls, etc., to achieve the effects of saving construction period, stable performance and convenient construction

Inactive Publication Date: 2019-05-07
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no relevant reports in China that combine polymer film bag grouting, polymer conduit grouting technology and traditional concrete high-pressure grouting anchoring technology

Method used

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  • Pre-stressed anchor rod support anchoring device and method
  • Pre-stressed anchor rod support anchoring device and method

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Embodiment Construction

[0034] A prestressed bolt support anchoring method, comprising the following steps,

[0035] (1) Determine the drilling position and mark it;

[0036] (2) Drilling: Use rotary drilling rigs or small pneumatic electric drilling rigs for drilling. In order to ensure the quality of the drilling, a back-blowing slag removal device is installed on the drilling tool to clean up the sundries in the hole;

[0037] (3) Pretreatment of the anchor rod: In order to ensure the centering of the rod body, a set of centering brackets are welded on the anchor rod every 1.5 meters, and the stains on the surface of the anchor rod are treated so as not to affect the anchoring effect. The position of the hole bag, the hole sealing bag is tied on the anchor rod, and the anchor rod passes through the hole sealing bag;

[0038] (4) Place the anchor rod: place the anchor rod at the center of the drilled hole, the anchor rod is concentric with the drilled hole. Be careful during the installation proce...

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Abstract

The invention provides a new method for pre-stressed polymer anchor rod support of rock-soil anchoring. The new method comprises the following steps that a drill hole position is determined; drillingis carried out and sundries in a hole are cleared away; contaminants on the surface of a rod body are cleared away, a bracket is welded and centered, and a hole sealing cloth bag is bundled up; the rod body is put into the drill hole; a polymer is injected into the hole sealing cloth bag to seal the hole, the polymer is injected into an anchoring section; pre-stress tensioning and locking are carried out; effective pre-stress is monitored, after pre-stress locking is carried out for 24 hours, the situation of pre-stress loss is observed, and if the pre-stress loss exceeds 10% of the designed tensioning force, compensation tensioning and locking are carried out; concrete slurry is casted, and hole sealing is carried out. The new method has the advantages that the use is rapid and safe, thetime is saved, a rock-soil body can be rapidly anchored, the permeability coefficient is very low, antiseptic treatment does not need to be carried out specially on the rod body, the rod body has a certain flexibility and is suitable for the deformation of the rock-soil body better, the bonding strength of the rod body with a matrix is greater than that of concrete, and the method is more suitablefor engineering needing to be reinforced rapidly.

Description

technical field [0001] The invention belongs to the technical field of rock-soil anchoring and support, and in particular relates to a prestressed bolt support anchoring device and method. Background technique [0002] my country has a vast territory, rich geological and geomorphic units, a large span from north to south, and complex geological conditions. The construction of large-scale projects will inevitably span different geological units, and sometimes pass through special rock and soil bodies; for example, the South-to-North Water Diversion Project encounters expansive soil in the Henan section of the route, and there is a large amount of collapsible loess in Northwest my country; these particularities The soil is extremely sensitive to water, and concrete is still used in the current soil support, although after continuous improvement, water is indispensable in the traditional anchor support. [0003] With the continuous development of anchoring technology and the co...

Claims

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Application Information

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IPC IPC(8): E21D20/00E21D20/02E02D5/74
Inventor 王复明石明生王道路郝燕洁王超杰李禄禄陈永利张素亚
Owner ZHENGZHOU UNIV
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