Geological Characteristics And Stability Evaluation Of Rock Mass In Dongqian Lake Area

This paper,taking"ningbo city circle(southern)1:50000 environmental geological survey project"as the backing,based on the comprehensive analysis of dongqian lake area on the basis of the conditions of geological environment background,the engineering geological characteristics of rock mass in the studied area a supplementary investigation,in-depth analysis of the influence on the stability of rock mass landform,stratum lithology,fracture and fracture,hydrogeological conditions,factors such as the disaster point distribution,human engineering activities,According to the specification in engineering geology exploration of urban planning(CJJ57-2012),selected the landform type,slope and strata lithology,rock mass characteristics,fracture density and direction,groundwater activities and the disaster type and density,type and intensity of human engineering activities and so on eight factors as evaluation index,evaluation index classification standard,the stability of rock mass are established by using analytic hierarchy process(AHP)to determine the index weight,the comprehensive index model is used for rock mass stability evaluation of engineering geology and partition.Results showed that the stability region covers an area of64.01km~2,located in yuyao city of notoginseng~zhenhai nine dragons,yinzhou bystreet~Yin river's bridge,fenghua Xiao Wang temple to yinzhou gainesville to deep gaps and beilun small harbor,shibahashi,daxie island vast hilly mountainous area,such as the main characteristics of gentle slope hilly topography,lithology for hard complete welding tuff,without the disaster point distribution,human engineering activities not forming scarp or impending surface;Fenghuang mountain,north leng county,a relatively stable area;Basic region cixi five lei temple~jiangbei,zhenhai Xie pu quan lake reservoir protect the temple,yuyao zhang water~great saphenous,yinzhou Yin river's bridge,yinzhou gainesville to design,beilun new road~yinzhou sanxi pu openmindedness reservoir reservoir and other regions;Unsteady district jiang beizhuang bridge~jiangdong east suburb.