Genetic Mechanism And Stability Analysis Of Gentle Dip Bedding Rock Landslide In Daba Mountain Area

The terrain of Daba mountainous area is complex and the lithology is diverse.It has a unique arc structure,and the geological environment is very complex.In addition,the area is a strong rainfall center in the same latitudes in China,forming a large number of geological disasters mainly by landslides,which is a famous mountainous natural disaster area and heavy disaster area in our country.Among them,the landform in the Daba mountainous area is mainly a single side mountain,a single side-like mountain and a table-like mountain.The slope is concentrated at 10-30 degrees.In addition,the red rock area is mostly soft and hard bed rock interbedded,which birthing a large number of slow dip and bedding rock landslides.Based on this,the genetic mechanism and stability analysis of the slow dip and bedding rock landslides in Daba mountain area are carried out to provide theoretical and technical support for the study of the genetic mechanism and the prevention and control of the slow dip and bedding rock landslides.Through the detailed investigation of 60 typical landslides in the field,the distribution regular and the shape of the trailing edge crack are studied.By collecting the rainfall data in Daba mountain area for the last 15 years,the rainfall patterns are analyzed,and 7 types of rain patterns are divided,and the response relations between the landslides and rainfall are studied.Finally,the numerical value of the rainfall is studied.The stability of landslide under different rainfall forms is simulated.The main contents of the work are as follows:First,through the collection of typical landslides information,the distribution of landform,slope,terrain,lithology,slope structure and landslide is summed up.Then through the investigation of the morphological characteristics and development stages of the trailing edge pull cracks in the landslide,the pattern of the trailing edge cracks is divided into three types.Secondly,by collecting the rainfall data of the Daba Mountain Area in the last 15 years,the rainfall rain type is used as the key factor to induce the gentle dip and bedding rock landslides,and the rainfall patterns in the daba mountainous area are divided into single peak type,double peak type,.Incrementing type,diminishing type,uniformity type.The relationship between the 7 types of rainfall and landslides’ stability is mainly studied.Finally,the influence of different forms of rainfall on landslide stability is studied by numerical simulation.