Verification device and method for load platform effect of self-expansion anchoring system

An anchoring system and verification device technology, applied in measurement devices, climate change adaptation, and the use of stable tension/pressure to test the strength of materials, etc. The effect of improving anchoring performance and improving observation accuracy

Active Publication Date: 2021-06-18
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of the strength of the weak rock and soil in the weak stratum, only adding steel plates to a certain part of the rock and soil on the slope under the action of gravity will still make the bolt system and the soil in the weak stratum have large gaps and a small degree of aggregation. There is still a lot of room for improvement in the pull-out force of the anchor

Method used

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  • Verification device and method for load platform effect of self-expansion anchoring system
  • Verification device and method for load platform effect of self-expansion anchoring system
  • Verification device and method for load platform effect of self-expansion anchoring system

Examples

Experimental program
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Effect test

Embodiment 1

[0048] see Figure 1-9 , a verification device for the load platform effect of the self-expanding anchorage system, which includes two parallel first confining pressure splints 1 and two parallel second confining pressure splints 2; the first confining pressure splint 1 and the second confining pressure splint 2 are respectively processed with a plurality of evenly distributed threaded holes, and the first confining pressure splints 1 and the second confining pressure splints 2 arranged in pairs are fixedly connected by the threaded rods 3 and nuts 4 respectively, and the overall enclosing Form a box structure with an upper and lower roof; adjust the nut 4 to apply corresponding pressure to the device to simulate the real mountain slope surrounding rock pressure environment. By adopting the verification device of the above-mentioned device, the real mountain slope surrounding rock pressure environment can be simulated.

[0049] Further, the first confining pressure splint 1 a...

Embodiment 2

[0055] The verification device for the load platform effect of the self-expanding anchorage system is a test method for the load platform effect, including the following steps:

[0056] Step1: Make a corresponding mold according to the size of the rock sample 6 and pour the cement-based anchoring material, and at the same time add intermittent short fibers to it, stir the concrete to distribute the short fibers evenly, and wait for the material to solidify;

[0057] Step2: Using the impact rotary compaction drilling method, the impactor is installed at the bottom of the drill pipe, the impactor is equipped with a compaction drill bit, and the impact force of the impactor is used to drive the drill bit into the rock sample 6 during drilling;

[0058] Step3: First fix the second confining pressure splint 2 and the rock sample 6, pass the threaded rod 3 through the threaded holes of the front and rear splints and install the nut 4, and then assemble the first confining pressure sp...

Embodiment 3

[0069] Take the amount of expansion agent ω=10 as an example:

[0070] The verification device for the load platform effect of the self-expanding anchorage system is a test method for the load platform effect, including the following steps:

[0071] Step1: Make a corresponding mold according to the size of the rock sample and pour the cement-based anchoring material into it. At the same time, add an appropriate amount of intermittent short fiber material, stir the concrete to distribute the short fiber evenly, and wait for the material to solidify;

[0072] Step2: Using the impact rotary compaction drilling method, the impactor is installed at the bottom of the drill pipe. The impactor is equipped with a compact drill bit of a special shape. When drilling, the impact force of the impactor is used to drive the drill bit into the rock sample;

[0073] Step3: First fix the second confining pressure splint with the rock sample, pass the threaded rod through the threaded hole of th...

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Abstract

The invention provides a verification device and method for the load platform effect of a self-expansion anchoring system. The verification device comprises two first confining pressure clamping plates arranged in parallel and two second confining pressure clamping plates arranged in parallel. The first confining pressure clamping plates and the second confining pressure clamping plates are each provided with a plurality of evenly-distributed threaded holes, the first confining pressure clamping plates and the second confining pressure clamping plates which are arranged in pairs are fixedly connected through threaded rods and nuts which are pulled oppositely, and a box body structure with the upper portion and the lower portion not sealed is defined by the first confining pressure clamping plates and the second confining pressure clamping plates in a whole. Corresponding pressure is applied to the device by adjusting the nut so as to simulate a real mountain slope surrounding rock pressure environment. The expanding agent is added into the cement-based anchoring material, so that the interface shearing force is greatly improved, and the pulling resistance is obviously improved compared with that of a common anchoring system.

Description

technical field [0001] The invention relates to a verification device and method for the load platform effect of a self-expanding anchor system, and relates to the technical field of anchoring in energy, transportation, water conservancy and other projects. Background technique [0002] With the rapid development of geotechnical engineering, anchoring technology has become an important branch. It is widely used in engineering fields such as slope protection, foundation pit, tunnel, dam body, wharf, subway, underground space engineering and tension foundation. [0003] At present, related technical inventions have been made on how to improve the anchorage performance and enhance the ultimate pullout resistance of the anchor bolt. The hoop effect greatly improves the bonding performance of the steel bar, so that the anchorage performance between the steel bar and the grouting material can be guaranteed. However, in the analysis of the failure mode and stress-strain curve of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/06G01N3/04G01N23/046
CPCG01N3/08G01N3/04G01N3/06G01N23/046G01N2203/0017G01N2203/0298G01N2203/0641Y02A10/23
Inventor 刘杰李洪亚李彦蓉李运舟朱晓涵陈姝婷李轩宇宋瑞孙荣琪谢晓康唐洪宇司马艳李远航杨浩宇石谦杜卓兴
Owner CHINA THREE GORGES UNIV
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