Study On Stability Analysis And Monitoring And Early Warning Of Landslide In Sanjia Villages Of Pantian Express-way

Landslide is difficult to predict,burst,destroy,and destroy quickly.It often brings serious disaster,causing huge casualties and economic losses.Panzhihua,Sichuan Province,has complicated topography and concentrated rainfall.On the outskirts of Panzhihua Jing Kun speed Jin Jiang town to the ground Zhen Tian real section,referred to as the Pantian expressway,affected by rainfall,road excavation,fill the influence,cause of landslide,pavement cracking,culvert staggered,serious threat to the highway operation and Sanjia village hundreds of people's lives and property safety.Therefore,landslide control is imminent,and landslide monitoring and warning is one of the important means of landslide control.In this paper,Pantian high-speed Sanjia village landslide as the main research object,based on summarizing the latest landslide monitoring and early warning research,collect the relevant data of landslide Pantian high-speed Sanjia village,analyzes the development characteristics and formation conditions of the landslide,the landslide stability calculation analysis,according to the landslide monitoring scheme,set up the landslide monitoring and early warning system.Landslide early warning method is adopted and preliminary warning index and warning system are developed preliminarily in the four stage.The main research results are as follows:(1)through field investigation and preliminary analysis of the formation of Pantian high-speed Sanjia village landslide mechanism and deformation characteristics,summed up the giant landslide soil landslide is in the characteristics of slow creep stage,and has the overall deformation and local deformation of two kinds of potential failure modes.(2)using the method of limit equilibrium and FLAC3 D numerical simulation,the stability of three landslides was quantitatively evaluated.The results show that the overall stability of the three landslides is better under natural conditions.Under the rainstorm and earthquake conditions,the stability coefficient of the three villages landslide decreases,and there is the possibility of local deformation and destruction.After filling,the local stability of the three villages is greatly affected,and the overall stability is less affected.(3)through the analysis of the deformation characteristics of Pantian high-speed Sanjia village landslide,landslide monitoring technology combined with the specification,selected to deep displacement,4 landslide monitoring project of rainfall,surface displacement and supplemented by manual inspection,and according to the monitoring system layout,automatic monitoring and warning system of landslide and construction of a set of data acquisition and transmission and,in one of the early warning analysis.And in the monitoring results of the past two years,a large number of monitoring data were obtained,and compared with the stability evaluation results,which effectively reflects the slow creep development of landslide.(4)the relevant data,through the study of Pantian high-speed Sanjia village landslide stability analysis and the results of monitoring data,combined with the landslide early warning indicators of advanced domestic and international research,the calculation parameters of landslide early warning threshold.Four warning indexes,which are based on rainfall,landslide deformation and macro indications,have been determined.The early-warning method of monitoring system has been worked out,and three comprehensive warning systems of landslide have been constructed.