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

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.

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...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of the inconvenient adjustment of the prestressed and anchorage length of the anchor, the present invention provides a prestressed anchor and a test method for indoor simulation tests. The specific technical scheme is as follows

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