Finite Element Numerical Simulation Of Soil Slope Stability Based In Shangrao Area, Jiangxi Province

Slope stability analysis has always been a complex problem in engineering practice and research.After a long time of accumulation and research,many problems about slope stability have been solved,but due to the influence of regions,the stability of slopes in different regions is different.As one of the representative regions of Jiangxi Province,Shangrao area has frequent and frequent geological disasters,especially the largest number of slope disasters.Therefore,it is necessary to study the slope in Shangrao area and analyze the stability of the slope under various conditions.Based on the geological disaster investigation in Shangrao area,Jiangxi Province,starting with the geometric form and parameter selection of the model,this paper establishes a typical slope model by using the finite element analysis software ANSYS,systematically analyzes the influence of slope angle,rainfall infiltration and artificial slope cutting on slope stability,and then compares and analyzes the stability of the slope before and after anti slide pile reinforcement,The following results have been achieved:(1)Based on the collected data and field survey data,the analysis results show that the types of geological disasters in Shangrao area are divided into landslide,collapse,debris flow,ground collapse,etc.,of which the number of landslide disasters is the largest,accounting for about 69% of the total;Affected by landform,formation lithology,geological structure,rainfall and human engineering activities,the distribution of geological disasters in the region is uneven.The development of disasters is mostly concentrated in the range of slope 20 °-50 ° and elevation less than 200 m,and the nature of disasters is mainly soil;(2)Based on the statistics of influencing factors of geological disasters in the region,the stability of slopes under different slope angles,rainfall(moisture content)and slope cutting angles is analyzed.The results show that the slope angle has a great influence on the stability of the slope.With the increase of the slope angle,the plastic zone of the slope model runs from the foot to the top of the slope,and the safety factor of the slope decreases gradually;The influence of rainfall is characterized by the change of soil water content.The relationship between water content and safety factor of slopes with different slope angles is consistent.With the increase of water content,the safety factor of slopes decreases;Under the influence of artificial slope cutting,unloading rebound or stress concentration occurs in the slope,and the slope stability decreases with the increase of slope cutting angle.(3)The stability of soil slope before and after anti slide pile reinforcement is analyzed.After reinforcement,the safety factor of slope increases and the stability of slope is significantly improved;The influence of pile length,pile section width and pile position on slope stability is analyzed and discussed.With the increase of pile length and pile section width,the slope safety factor increases continuously;For the anti slide pile with small pile length,the pile body shall be arranged from the middle of the slope body to the slope foot.