Railway Adjacent Tunnel Construction Impact Analysis And Evaluation Method Study

As the jump of the national economy,railway construction usher inunprecedented development opportunity.As the type of difficult construction,railway adjacent tunnel construction appears in various traffic on the construction sitefrequently.This project often accompany all safe hidden trouble.Beacause of scheduleurgent for construction,security task and social concerns,Railway adjacent tunnelconstruction is carrier out research by scholar one after another.Because of being complex geological circumstance, diverse constructionmethods and safety concerns prominent，the paper is set in railway adjacent tunnelconstruction in Fuping.On the basis of mechanics mechanism and stress change rule，the paper carried out the impact of railway adjacent tunnel construction analysis.Withthe help of LabVIEW virtual instrument software platform,railway adjacent tunnelconstruction risk evaluation system is developed by the thesis.The features and mainwork of the paper includes the following several aspects:(1)By using the theory of elastic-plastic mechanics in the wall,the excavationprocess of railway adjacent tunnel construction is simplified into the mechanicalmodel of plane stress condition.Through the analysis of tunnel surrounding rock stressfield after excavation，and distinguishing between tunnel surrounding range of elasticand plastic,what have been the tunnel interaction factors.And the thesis will beanalysis of factors affecting the stability of construction.(2)Relying on rifampicin line near the tunnel construction project,what carriesout the stability simulation study in two types of construction conditions.The thesisanalyzes the changing laws of safety coefficient in different conditions anddistance.Tunnel cross section on the safety coefficient of dangerous points areexplored in the thesis.Based on the displacement of the tunnel section in theconstruction process,the thesis gets the position of large displacement in tunnel.(3)Useing evaluation algorithm of FCE and AHP,risk evaluation model ofrailway adjacent tunnel construction is established.Evaluation model are importedLabVIEW virtual instrument software platform because of integrating ACCESSdatabase and LabSQL architecture theory.Developed railway adjacent tunnelconstruction safety risk assessment software,what achieves different user login,grading, evaluation and query and print function. Based on the research findings, this paper can provide guidance for tunnel inconstruction safety by several kinds of methods.