Research On Revival Mechanism And Stability Of Disturbed Ancient Landslide

Human engineering activities inevitably meet the problem of the new landslide caused by the resurrection of the ancient landslide revival.Study the basic characteristics and the causes of ancient landslide and to correctly evaluate its stability are important in the prevention of landslide revival.This paper,taking the trailing edge landslide of Hanyuan new city T8 plot as an example,combined with the geological survey and test results,we comprehensively studied the revival mechanism and stability problems of disturbed ancient landslide,carried out the numerical simulation analysis on the resurrection of the ancient landslide evolution process and specific prevention measures are proposed according to the results of the study.The main content of the research is as follows:On the previous research,the paper analyzed the influence factors of the disturbed resuscitation of the ancient landslide,namely the topography of landslide area,geological structure,slope geotechnical characteristics,potential slip surface(zone),human disturbance,water infiltration,earthquakes effect,weathering,reservoir water and the river scour the slope,put forward landslide revival was a complex dynamic evolution process affected by multiple genetic factors.Different geological conditions may induce different landslide form,which may change as the conditions change,we need a comprehensive system to study the revival mechanism and stability problems of the ancient landslide.On the basis of studying the influence factors of the disturbed resurrection of the ancient slope,taken the T8 plot trailing landslide as an example,we concluded that due to human disturbance and heavy rains,landslide revived along the ancient sliding surface and occurred creep,cracking,shear,sliding failure by field investigation,analyzing slope terrain,water infiltration,formation lithology,geological characteristics and studying basic revival characteristics causes and failure mechanism of disturbed ancient landslide.We analyzed and evaluated the stability of landslide respectively by many methods such as the geological investigation and analysis method,transfer coefficient,FLAC3 D numerical simulation method.Under the conditions of natural rain and rainstorm,we conducted the simulation analysis of ancient landslide revival evolution respectively by FLAC3 D software,and concluded that the landslide is unstable under natural condition,but the rainstorm will generate creep,cracking,shear,sliding failure,which was basically identical with the field investigation.Finally,after a comprehensive comparison,we put forward three kinds of landslide governance programme,which were maily anti-slide pile,and simultaneously cutting slope to reduce load and waterproof and drainage.