Slope Stability Analysis And Support Design With The Method Of Point Safety Factor

With the development of the transportation industry,people's transformation of nature is more intense,structural form of the slope which engineer confront in the project is becoming more and more diffcult,and the spcace size is much bigger than before.Most of the technical codes for slope engineering are based on engineering practice experience and limit equilibrium method whcih are lack of the considerations of space effect,the slopes are conservative in design and support under this situation and caused the waste of cost.With the development of computers,numerical analysis is increasingly applied to engineering analysis.Traditional slope stability analysis methods such as limit equilibrium method and strength reduction method are not comprehensive to evaluate the stability of slopes with only one safety factor.Evaluation of the overall and local stability of slopes and cabble support design by point safety factor method and FLAC 3D,the research results are applied to the stability analysis and support design of the high slope of the approach road of Zhenfeng Power Plant.(1)Looking at the relevant literature at home and abroad,the current engineering community mainly uses the limit analysis method,the limit equilibrium method and the numerical analysis method for the slope stability analysis,all of which evaluate the slope from the overall stability.As a method of slope analysis,the point safety factor method can reflect the stability of the whole and the part at the same time,and reflect the most unfavorable position of the slope,which is of great significance to the support design.(2)The ACAD(Australian Computer Association)slope test was used to compare the calculation results of the point safety factor method.The overall safety factor and potential sliding surface were consistent with the standard answer,which verified the correctness of the program.(3)The two-dimensional theoretical model is used to calculate the position,angle and length of the bolt support of the slope.The relationship between the optimal design scheme and the point safety coefficient distribution and the position of the potential sliding surface is explored,and the general law is summarized.(4)Applying the general conclusions of 2D analysis to the design of support schemes for3 D slopes,comparing the reinforcement effects of different anchoring methods,selecting the optimal scheme,comparing the changes of slope stability before and after the support,and exploring the causes of the changes.