A kind of prestressed anchor rod and test method for indoor simulation test

A simulation test and prestressing technology, which is applied in the installation of bolts, earthwork drilling, mining equipment, etc., can solve the problems of inconvenient adjustment of anchorage length of bolts, and achieve convenient adjustment of diameter and length, expansion of scope, and easy control Effect

CN109973131BActive Publication Date: 2021-03-30SHANDONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-03-30

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Abstract

The invention provides a prestressed anchor rod for an indoor simulation test and a test method, and relates to the technical field of anchor rod simulation tests. The prestressed anchor rod includesan anchor rod body, an anchoring head, a bearing plate, a micro jack, a base plate, a nut, a liquid injection pipe and a liquid injection pump. The anchoring head is arranged at the anchoring end of the anchor rod body, and the anchoring end of the anchor rod body is conical. A tensioning joint is formed in the side surface of the anchoring head, and the bearing plate is arranged on one side of the exposed end of the anchor rod. The nut is arranged on the base plate in a pressed mode, and the anchor rod body sequentially penetrates through the bearing plate, the micro jack and the base plate.The jack is connected to the liquid injection pump through the liquid injection pipe, and a digital display pressure gauge is arranged on the liquid injection pipe. When the simulation test is carriedout, a hole is first drilled on a similar material model, then an anchor rod prestressed indoor simulation test system is installed, pre-tightening force is applied through the liquid injection pump,and reading adjustment is performed according to the digital display pressure gauge to complete the test. The prestressed anchor rod for the indoor simulation test and the test method solve the problem that the prestress adjustment is inconvenient in anchor rod tests, and further have the advantages such as simple and convenient operation and conformity to the sites.
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Description

technical field

[0001] The invention relates to the technical field of bolt simulation tests, in particular to a bolt used for indoor simulation tests with adjustable prestress and a method for using the bolt to perform simulation tests. Background technique

[0002] Bolt support is widely used in mining, geotechnical, tunnel and other engineering fields, and the effect of bolt support is closely related to the anchorage length and prestress size. Due to the limitation of on-site engineering, there are some difficulties in the field test, so the indoor simulation test has become an important research method.

[0003] At present, in the indoor simulation test, the anchor simulation materials can be divided into wood (bamboo, round rod, etc.), plastic (resin anchor), and steel (round steel, screw, etc.) according to the material. When it is difficult to control the length of the knot, full-length anchoring is often used, and the first two types have no pre-tightening force, a...

Examples

Embodiment Construction

[0026] combine Figure 1 to Figure 3 As shown, the present invention provides a kind of prestressed anchor for indoor simulation test and the specific implementation of the test method is as follows.

[0027] A prestressed anchor for indoor simulation tests specifically includes an anchor body 1, an anchor head 9, a bearing plate 2, a miniature jack 3, a backing plate 4, a nut 5, a liquid injection pipe 6, a digital display pressure gauge 7 and an injection liquid pump8. One end of the anchor body 1 is connected to the anchor head 9 through threads, and is used to fix the anchor end of the anchor body. The connection between the anchor head and the anchor body facilitates the adjustment of the anchor length of the anchor; the other end is connected to the nut 5 through threads, For tightening the bolt, the micro-jack 3 is used to adjust the preload of the bolt, which realizes the adjustment and control of the preload of the bolt, which is of great significance to the research...