Study On Nondestructive Testing In Fiberglass Bolts Anchorage Quality For Earthen Sites

Fiberglass bolt anchorage system is an important component in maintenance and reinforcement of earthen sites.It is the critical role in reinforcement of endangered earthen sites.The quality of fiberglass bolt anchorage system in earthen sites is directly relate with the survival of endangered earthen sites.So the detection of fiberglass bolt anchorage system for earthen sites occupies a very important role in the maintenance and reinforcement.Fiberglass bolt anchorage testing is still in the stage of destructive test.As the pull-out test is time consuming,inconvenience and harmful to the earthen sites.In order to realize scientifically protect the earthen sites,the glass fiber bolt anchoring system of earthen sites needs nondestructive testing method.This paper tries to use nondestructive testing technology to evaluate the quality of fiberglass bolt anchorage for earthen sites.Based on stress wave theory and the reality of fiberglass bolt anchorage system on earthen sites,it is tested that the theoretical research and the corresponding verification of nondestructive testing in fiberglass bolt anchorage system for earthen sites.Study on the laboratory test and field investigation,the paper has obtained the criterion for testing instrument of glass fiber bolt system.Compare nondestructive testing index with the characteristics of pull-out testing,the paper were discussed two different detection methods.The main research results are as follows:(1)Motivate index is defined by using Hertz contact theory.It is quantified that mechanical stimulation process for the nondestructive testing of fiberglass bolt anchorage system on earthen sites.It is proved that characteristics of motivate index can describe incentive mechanism of fiberglass anchor system.(2)Through analysis of the stress wave propagation theory on fiberglass anchor system,the paper acquire the law of propagation on the stress wave for fiberglass anchor system on earthen sites.It provides the theoretical basis for the stress wave detection of fiberglass anchor system on earthen sites.(3)Combine the theory with experiment results of fiberglass anchor system on earthen sites,it is known that the experiment indexes is appropriate index of GFRP anchor system on earthen sites.