Method and device for testing the 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: 2018-08-14
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 the bonding strength of anchoring interface of anchoring system
  • Method and device for testing the bonding strength of anchoring interface of anchoring system
  • Method and device for testing the bonding strength of anchoring interface of anchoring system

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A. Cast a cuboid anchoring sample 1 with a size of 20 cm×20 cm×25 cm. The material used for anchoring sample 1 and its ratio are water:cement:quartz sand=0.4:1:1; after 14 days of curing for anchoring sample 1, Drill out the bolt hole that diameter is 30mm, length 250mm at its central axis; Make diameter is 10mm, the anchor rod 2 that total length is 60cm, the length of extension section 8 in the anchor rod 2 is 10cm; The anchor rod 2 is placed on In the anchor drilling center, pour anchoring agent 3 into the anchor drilling. The material and proportion of anchoring agent 3 are water: cement = 0.5:1; 3 Composition of test specimens.

[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 20 cm×20 cm×45 cm, and the diameter of the limiting hole 5 is 33 mm.

[0041] C. When testing the bond...

Embodiment 2

[0045] A. Cast a cuboid anchoring sample 1 with a size of 20 cm×20 cm×25 cm. The material used for anchoring sample 1 and its ratio are water:cement:quartz sand=0.4:1:1; after 14 days of curing for anchoring sample 1, Drill out the bolt hole that diameter is 30mm, length 250mm at its central axis; Make diameter is 10mm, the anchor rod 2 that total length is 60cm, the length of extension section 8 in the anchor rod 2 is 10cm; The anchor rod 2 is placed on In the anchor drilling center, pour anchoring agent 3 into the anchor drilling. The material and proportion of anchoring agent 3 are water: cement = 0.5:1; 3 Composition of test specimens.

[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 20 cm×20 cm×45 cm, and the diameter of the limiting hole 5 is 33 mm.

[0047] C. When testing the bond...

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Abstract

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. The method includes the following steps: making an anchoring sample, drilling an anchor hole on the central axis of the anchoring sample, placing the anchor in the anchor hole, pouring an anchoring agent into the anchor hole, and making a test sample; After the anchoring agent is solidified, place the test sample in the limit device, and the anchor rod passes through the limit hole; when testing the bond strength of the first anchor interface, screw the limit plug into the limit hole, and make the limit The plug is closely attached to the test sample; when testing the bond strength of the second anchoring interface, install the tension plate on the inner extension of the anchor rod, and make the tension plate and the anchoring agent tightly fit; apply tension to the anchor rod Pull-out force, and record the pull-out force and pull-out displacement in real time; analyze the test data, calculate the bond strength of the anchorage interface according to the formula, and draw the 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 Patents(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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