Stability Analysis And Reinforcement Effect Of Landslide At Shimashao Dumping Site Of Jianshan Phosphorite Ore

In this type of landslide prevention and control measures,anti-slide piles can provide good anti-slide capability,and the location of the pile is relatively flexible and variable.It is widely used in various types of landslide control measures.However,the optimal location of anti-slide piles is still widely divided.Therefore,through a variety of literature and papers,this paper relies on the actual engineering background,and proposes three different reinforcement schemes for the location of the pile,from the support effect on the most dangerous potential sliding surface,and the anti-slide pile’s own structure is subjected to shear,Comparative analysis of bending moments,etc.,to get the most suitable location of anti-slide piles.This article takes this as the starting point,the main research contents are as follows:(1)Collect and sort out various data of landslides in Shimashao Dumping Site through survey report,and analyze the stability of the current landslides prone to slip under the limit equilibrium method,compare and obtain the most unfavorable section,and choose it as the design section,And calculate the shape and position of the most dangerous potential sliding surface in the whole and part of the original section;(2)The initial slope of the sliding original section is cut to reduce the load,so that the overall stability of the slope is basically close to the stability coefficient required by the design.Then the section model after the slope is calculated and analyzed.The limit and equilibrium method is used to calculate and analyze the most and potentially dangerous sliding surfaces of the profile as a whole,and the displacement,principal stress and maximum shear stress cloud of the profile are obtained by numerical simulation.Based on this result,the next step of reinforcement plan design is carried out.(3)The unbalanced thrust method(implicit)is used to calculate and analyze the most dangerous potential sliding surface of the profile,that is,the landslide thrust of the sliding surface with the smallest stability coefficient,divide it into blocks,and obtain the sliding force,remaining sliding force,Anti-slip force value.Three antislide piles are arranged at the positions of the blocks with the largest values of the following sliding force,remaining sliding force and anti-slipping force to form three sets of support schemes.And through the limit equilibrium method,it is obtained whether the stability coefficient of the profile and the part meets the design standard after the support.If the design requirements are not met,the slope reinforcement plan is adjusted again.(4)Select the most dangerous potential sliding surface when unsupported antisliding pile is selected,calculate the total sliding force,total anti-sliding force and stability coefficient of the potential sliding surface after pile placement by limit equilibrium method,and compare and analyze different piles The numerical value of the position is used to obtain the optimal pile placement under this comparison method;at the same time,when comparing the different pile positions,the size of the anti-slide pile itself is subjected to shear force,bending moment and pile top displacement.Comprehensive analysis results in the optimal pile placement.In this paper,two measures,limit balance means and numerical imitation means,are used to evaluate the stability of the selected analysis profile.The most dangerous potential sliding surface and the most likely sliding body sliding force are calculated through the imbalanced thrust generation(implicit).Based on the arrangement of the anti-slide piles,the landslides are reinforced,and the different reinforcement schemes are compared and analyzed by the limit equilibrium method.Optimal anti-slide pile support position,the research conclusions have certain reference significance for mountain landslide prevention.