Research On Slope Security Assessment Method Of Mountain Expressway

Along with the rapid development of china’s economy,a new round of developmentwas exposed to transport infrastructure,especially,the expressway construction hadpenetrated to the western area.It rised in road-grade and road-standard,increasingly,inaddition to the special geographical environment in western mountain area,had becamea common technical problems and priorities in geographical engineering.So,it had agreat mean to do the research of expressway slope security evaluation of mountain area.Mountainous area highway slope had been studied in detail in the paper,and thefollowing conclusions and results were work out:1According to the analysis of expressway slope security evaluation of mountainarea,it had3features: the expressway slopes of mountain area were zonally distributedalong the highway, and in large quantities; its formation time was short,and had a largedeformation rate;it had a complex Geological structure and a big difficult in exploration.Baesd on internal factors,external factors,environment and structure factors, the effectof water,vibration factor,human factors, the paper respectively analyzed the stability ofthe slope safety influence factors;2It had builded a systerm of expressway slope security pre-evaluation in mountainarea that were made up from lithology,stress,state,environment,and quantifing the index;put forward AHP and the Delphi method coupling method for determining weight basedon the traditional AHP；3In coal mining areas, environmental safety evaluation as a starting point,leaded thethought of the post-evaluation into the blank in the field of slope stability; from the startof the slope development influencing factors after the project put into use,explored thesystem of expressway slope security post-evaluation in mountain area which was madeup from internal index,external index,dynamic index;4Divided the work of expressway slope security post-evaluation in mountain areainto3periods,which were recent,metaphase and forward.So,the expressway slopesecurity evaluation systerm could be throughout the life of the whole process ofhighway projects, extended the scope of the original evaluation system, and theevaluation system had been made changes from static to dynamic;5To K8+490~K9+090and K9+130~K9+231.45two sections as example,verifiedthe expressway slope security pre-evaluation in mountain area and expressway slope security post-evaluation in mountain area through Matter-element extension method...