Study On Monitor Evaluation And Distortion Analysis Of Surrounding Rock Mass In Longgang Tunnel

Traffic is an important part of the state foundational constructure and itplays an important role in the development of national economy.Theexperiences of economy development in all countries over the world indicatethat rapid and expedite traffic is the absolutely necessary conditions of theeconomy development. Presently, my state has been one of the states with thetunnel most and development rapid. Because railway tunnel construction is ina close work place and geographic conditions variety. If timbering orconstruction method is unsuitable, project accidents are easy to happen.According to Stat., about one to third and one to second is because of impropertimbering.Therefore, in the course of tunnel construction, making a geographicinvestigate on the dig workplace in time, giving a stability classification on thesurrounding rock mass and amending design classification on the surroundingrock mass and timbering parameters are necessary. Through the field measureon the rock mass and timbering, feed back the rock mass-timberingcompound's mechanics and change conditions and give a reasonable spanoccasion about the second timbering. Through the information of monitor andmeasure, instructing tunnel's design and construction, it is important economyand research to ensure the construction safety and reduce project cost.Taking the LongGang tunnel in Jingyu-Huinan railway as an example,after collecting in detail the information about reconnaissance, design and rockmass engineering geological conditions, the paper gives the rock mass quality...