| Dalian is located at the southern end of the Liaodong Peninsula and at the junction of the Yellow Sea and the Bohai Sea.It is an important port,trade,industry and tourist city across the sea from the Shandong Peninsula.Dalian has a wide variety of disaster geomorphologies.Geological structure,stratum lithology,vegetation and other natural conditions are closely related to human activities.The combination of natural conditions in different regions of the region is different,so there are differences in the types and development patterns of disaster landforms.Among them,landslides,landslides,debris flows,and ground collapses are the most widely distributed,most hazardous,and most frequently operated geological disasters in Dalian.Collapses and landslides are the most common,with dozens of occurrences each year,causing a series of major losses.Casualties also caused a large number of houses,roads and various infrastructure losses.Collapses and landslides are distributed in points,and multiple collapses and landslides form planar areas,forming disaster zones of different degrees and different areas,distributed throughout the city of Dalian.This paper uses the finite element method to analyze the slope stability.The use of finite element method to analyze slope stability is a method close to the actual situation.This method can meet the requirements of balance force conditions,coordination conditions,constitutive equations and boundary conditions.It can realistically simulate the failure state of the slope and show the scene of the slope.The strength reduction method used in this paper has all the advantages of the finite element method.This method can analyze the stability of the slope with or without support.The analysis results of the strength reduction method can be obtained by obtaining the law of stress and strain changes inside the slope body.In contrast,the situation of the slope can be elaborated in the end.Taking the slopes of four areas in Dalian as the research object,the basic geomorphological conditions and engineering geological conditions of the slope were studied.The basic forms of these four slopes were comprehensively studied through technical methods such as data investigation,field investigation,and laboratory tests.Characteristics,the finite element strength reduction method is applied to the overall stability of the slope.In order to better obtain the displacement and deformation of the slope body,the stability of the slope is analyzed using Midas / GTS software and its strain Further analysis of force and displacement,combined with the evaluation results of slope stability.The main research results are as follows:(1)Through the existing data investigation and field investigation,typical disaster landform points were selected for analysis,and the geological conditions of the slope were determined.(2)When the finite element method is used for structural analysis,the structure is discretized.Form a finite element grid,and give the information of the corresponding grid.Two-dimensional modeling of the slope through Midas / GTS and numerical simulation analysis of stability,using the slope finite element reduction method "SRM" to carry out the typical slope Numerical simulation and calculation to generate displacement cloud diagram and strain cloud diagram of slope body.(3)The finite element software simulation analysis shows that the safety factor of Lushun Tiger's Tail Slope under natural conditions is 0.6 and is in an unstable state.The safety factor of Chaancun slope is 1.5,which is in a stable state.The safety factor of Wafangdian slope is 1.3,which is stable.The stability factor of the Siergou slope is 0.6,which is in an unstable state.(4)Through the simulation analysis of the finite element software,the safety factor of the tiger tail slope of Lushun under rainfall conditions is 0.33,which is in an unstable state.The stability coefficient of Chaancun slope is 1.2,which is in a stable state.The safety factor of Siergou slope is 0.4,which is in an unstable state. |
PDF Full Text Request