Formation Mechanism And Stability Analysis Of Luojiaping Landslide In Suijiang County,Yunnan Province

Landslides are a highly hazardous type of geological disaster,and landslide stability analysis has an increasing demand for three-dimensional visual representation of geological survey data.How to effectively use these data,use three-dimensional visualization to express geological processes and phenomena,and intuitively express the morphology and attributes of geological bodies such as complex terrain and geological structure has become an important topic in the prevention and control of geological disasters.Based on the advantages of 3D geological modeling in visual editing of complex terrain and geomorphology,geological structure and morphological properties of geological bodies,this thesis studies the ideas and schemes of 3D geological model analysis methods effectively applied to landslide disaster prevention and control,and verifies the Luojiaping landslide in Suijiang County,Yunnan Province as an example.The topic of the thesis is closely related to the current frontier science and technology,economic construction and social development of this discipline,and has good theoretical and practical significance.The following studies were carried out and the corresponding results were achieved:1.By consulting the theoretical data of 3D geological modeling related research,sorting out and analyzing the application of 3D geological modeling software GOCAD and 3D geological modeling,introducing the research status of 3D geological modeling at home and abroad,and systematically expounding the basic concepts of 3D geological modeling,technical methods and their main advantages,analyze the geological environment and the formation mechanism of landslides.2.Relying on the Luojiaping landslide project,GOCAD software for professional 3D geological modeling is used to construct a threedimensional geological visualization model for the research area based on cross-sectional data combined with engineering geological plan and other data,and to analyze the slope stability of the interception profile of the built three-dimensional model,and the section data as a constraint element at the ground level to build the ground level model has good effect and is more consistent with the actual formation form.3.Based on GeoStudio numerical simulation software SLOPE/W module,using the principle of limit balance method,using the MohrCoulomb model to calculate and analyze the stability of Luojiaping landslide,the safety factor and the most dangerous sliding surface corresponding to it are calculated under four working conditions of different water level elevations of Luojiaping landslide.4.The numerical simulation calculation results are compared and analyzed with the data of the field survey of the engineering in the research area,and the analysis results of the two can be roughly consistent.In the initial water storage level elevation,the slope is basically in a critical state,when the reservoir water level continues to rise,the safety factor will be further reduced,the slope may be unstable as a whole,which is more consistent with the actual deformation of the site,and it is judged that the Luojiaping landslide is in an unstable state,thus verifying the rationality of the numerical model,and also showing that the three-dimensional geological modeling and the limit balance method are combined to conduct stability analysis of the slope.