The Test Research Of The Anchor Force Mechanism

So far,the anchoring technology application in the engineering has been one hundred years of history, geotechnical anchorage has become an important branch in the field of geotechnical engineering. Especially for the economic construction to speed up infrastructure construction, thus to build a large number of railway, highway tunnel. Expanding urban population surge in urban areas, the development and utilization of urban underground space is imperative. With anchor to anchoring in the geotechnical engineering construction of our country has a fairly broad application prospects. Compared to the anchor’s widely used in engineering,the theory research of anchor is lag. The accident is often happen in engineering caused by anchoring problem.Therefore, it is necessary to study the work mechanism of anchor’s anchoring system, in order to provide theoretical guidance for the use of bolt in engineering.This article through the internal force test with tensile type anchor and distributed bearing "expanding head anchor, analyze the force mechanism of this two kinds of anchor. Respectively by different loading ways of the test, and choose different strain gauge, the internal force of anchor test were studied.In this paper. This paper mainly do the following several aspects.l.To theoretical analyze the working mechanism and characteristics of tensile type anchor. Using different sensors for internal testing of tensile type anchor, at the same time recording the displacement of anchor head. Deal with test data, according the results to draw the tensile type anchor axial force distribution curve, the anchor axial force at different positions of the anchor along with the change of load curve, The lateral resistance distribution curve of anchor. Analysis of these curves, conclude the force mechanism of the tensile type anchor.2.To analyze the characteristics of distributed bearing· expanding head anchor. Us different loading way to make internal testing of distributed bearing· expanding head anchor, at the same time recording the displacement of anchor head. Deal with test data, according the results to draw the distributed bearing· expanding head anchor axial force distribution curve. Analysis of these curves, conclude the force mechanism of the distributed bearing· expanding head anchor.3.From two different of perspective to study the anchor internal force test, one is install different sensor and use the same loading way to text, the other is install the same sensor and use the different loading way to text.4.By comparing the side resistance under the maximum load with the standard, to verify the ultimate bond strength between the anchor anchoring grouting body and surrounding strata.In this paper, there two groups of test is engineering field test. On the one hand, test results can provides some important advice and reference for anchor research and anchor application in the future. On the other hand, through the different perspective to study the anchor internal force test, provides a reference to a certain extent for the anchor internal force test in the engineering.