Method and device for testing bonding strength of anchoring interface of anchoring system

An interface bonding and anchoring system technology, applied in the field of geotechnical engineering, can solve the problem of inability to accurately calculate the bonding strength of the first and second anchoring interfaces, the inability to obtain the bonding strength of the first anchoring interface, and the inability to obtain the second anchoring interface Bond strength and other issues, to achieve the effect of simple and easy test operation process, scientific and reasonable test method, and simple structure

Active Publication Date: 2016-07-20
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional indoor pull-out test cannot accurately obtain the bond strength of the first and second anchor interfaces, and there are the following main defects: (1) The first and second anchor interfaces are not damaged under the pull-out force, only the anchoring agent Internal damage occurs, so the measured result is essentially the bond strength of the anchoring agent itself, not the bond strength of the anchoring interface; (2) Both the first and second anchoring interfaces are damaged under the pull-out force, so it cannot Accurately calculate the bond strength of the first and second anchor interfaces; (3) Under the pull-out force, the first anchor interface is always damaged, so the bond strength of the second anchor interface cannot be obtained; (4) The pull-out force However, the second anchoring interface is always damaged, so the bond strength of the first anchoring interface cannot be obtained

Method used

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  • Method and device for testing bonding strength of anchoring interface of anchoring system
  • Method and device for testing bonding strength of anchoring interface of anchoring system
  • Method and device for testing bonding strength of anchoring interface of anchoring system

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A. Pour a cuboid anchoring sample 1 with a size of 20cm×20cm×25cm. The material and proportion of anchoring sample 1 are water:cement:quartz sand=0.4:1:1; after 14 days of curing for anchoring sample 1, The central axis is drilled with a diameter of 30mm and a bolt hole of 250mm in length; making a bolt 2 with a diameter of 10mm and a total length of 60cm, and the length of the extension section 8 in the bolt 2 is 10cm; placing the bolt 2 on the bolt In the center of the drill hole, pour anchoring agent 3 into the borehole of the anchor rod. The material used for anchoring agent 3 and its ratio are water: cement = 0.5:1; so far, it is composed of anchoring sample 1, anchor rod 2 and anchoring agent 3. test sample.

[0040] B. After the anchoring agent 3 is solidified, the test sample is placed in the sample chamber 4, and the anchor rod 2 passes through the limiting hole 5, such as figure 2 As shown, the internal size of the sample chamber 4 is 20cm×20cm×45cm, and t...

Embodiment 2

[0045] A. Pour a cuboid anchoring sample 1 with a size of 20cm×20cm×25cm. The material and proportion of anchoring sample 1 are water:cement:quartz sand=0.4:1:1; after 14 days of curing for anchoring sample 1, The central axis is drilled with a diameter of 30mm and a bolt hole of 250mm in length; making a bolt 2 with a diameter of 10mm and a total length of 60cm, and the length of the extension section 8 in the bolt 2 is 10cm; placing the bolt 2 on the bolt In the center of the drill hole, pour anchoring agent 3 into the borehole of the anchor rod. The material used for anchoring agent 3 and its ratio are water: cement = 0.5:1; so far, it is composed of anchoring sample 1, anchor rod 2 and anchoring agent 3. test sample.

[0046] B. After the anchoring agent 3 is solidified, the test sample is placed in the sample chamber 4, and the anchor rod 2 passes through the limiting hole 5, such as figure 2 As shown, the internal size of the sample chamber 4 is 20cm×20cm×45cm, and t...

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Abstract

The invention relates to a method and a device for testing the bonding strength of an anchoring interface of an anchoring system, and belongs to the technical field of geotechnical engineering. The method comprises the following steps: manufacturing an anchoring sample, drilling an anchor rod drill hole in a central axis of the anchor sample, placing an anchor rod in the anchor rod drill hole, and pouring an anchoring agent into the anchor rod drill hole to manufacture a test sample; after the anchoring agent is solidified, placing the test sample in a limiting device, and making the anchor rod penetrate through a limiting hole; when the bonding strength of a first anchoring interface is tested, screwing a limiting plug into the limiting hole, and tightly sticking the limiting plug and the test sample; when the bonding strength of a second anchoring interface is tested, mounting a pull bearing tray on an internal extension section of the anchor rod, and tightly sticking the pull bearing tray and the anchoring agent; applying a pulling force to the anchor rod, and recording the pulling force and a pulling displacement in real time; analyzing test data, calculating the bonding strength of the anchoring interface according to a formula, and drawing a test curve.

Description

technical field [0001] The invention relates to a method and a device for testing the bond strength of an anchorage interface of an anchorage system, belonging to the technical field of geotechnical engineering. Background technique [0002] Bolt is one of the most widely used support types in anchoring projects in transportation, water conservancy and mining industries. The anchor rod and the rock mass are bonded together by the anchoring agent, and the anchoring system is a comprehensive term including the anchor rod and the anchoring agent. The anchoring system contains two anchoring interfaces: the first anchoring interface refers to the anchoring interface formed by the bonding of the anchor rod and the anchoring agent; the second anchoring interface refers to the bonding between the anchoring agent and the surrounding rock mass (bolt drilling) The anchor interface formed by the knot. The bond strength of the anchor interface is one of the key factors affecting the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04
CPCG01N19/04
Inventor 徐荣超赵阳黄志全房敬年李建勇郝小红王江锋李幻
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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