Study On Prediction Criteria And Simulation Of The No 1 Landslide Of Tangjiao Village

Go on with the construction of water resources and hydropower projects, Reservoir would be increase.the Reservoir operating will cause a series of geologic hazards, landslide, which can cause great loss to the life and property as a natural geological disaster.Our country is a country with much many geological disasters,so it is a good way to predict and prevent those disasters.The keys of landslide prediction are prediction method and prediction criteria.Once the prediction method is determinered,the landslide can not be predict correctly without the correct prediction criteria. It is difficult to establish the prediction criteria,and many prediction criterias have been studied by some researchers around the world.but any of these prediction criterias has its limitation,and can not be as a uniform index to predict landslide.So the study on the prediction criteria must be established on the basis of deeply research for landslide type,characteristics,deformation features and the forming mechanism,together with the monitoring data,then find out the major effect factor for the landslide stability.Finally,the practical prediction criteria can be obtained. this article is taking the No 1 landslide of tangjiao village as an example to study.Study the engineering geology exploration data carefully,make know the landslide type,characteristics,and deformation mechanism,then find out the major factor for the landslidedeformation.The major effect factors of the landslide stability are the reservoir water repeated lifting and rainfall and water level down by Sudden.In order to determine the effect degree to the landslide stability by each factor,A two-dimensional numerical simulation software which was called geo-slope and its module seep/w and slope/w and sigma/w is adopted. Studied the in line groundwater of the landslide changing laws with condition of the water lifting and down of Reservoir , rainfall. According to the results of calculation to analyze and comprehensive evaluation, Its conclusion shows that with the Strength rainfall and water down of Reservoir, the stability of landslide is worst. Also, the Physic simulation is taken to analyze the stability of landslide in the condition of the water lifting and down of Reservoir,rainfall. the conclution express that Strength rainfall with water level 162metres of Reservoir down to 145metres and Strength rainfall with 175metres of Reservoir down to 145metres,the two condition can made the worst stability of No 1 landslide of tangjiao village,its also can cause the damage of shore.Finally, sum up the physical simulation conclusion and a two-dimensional numerical simulation conclusion, the No 1 landslide of tangjiao village would be unstabled by these prediction criterias,which are as follows : Deformation rate of geotechnical,the waterhead of slide surface,the waterhead of pit of landslide and the Strength of rain and lasting time.