Slope Stability Analysis Of Masonry Retaining Wall Considering Pore Water Pressure And Earthquake Action

There are many mountainous areas and earthquakes occur frequently in China.With the deepening of the western developmen t strategy,a large number of infrastructure projects will be constructed on mountains and natural landslides in China.In this way,whether the stability of slope can ensure the normal progress of the project and follow-up safety is a key issue that needs to be considered in the field of slope engineering.In the field of slope stability analysis,there are many mature methods,but there is still much room for the study of slope stability under various conditions.This paper chooses the limit analysis theo ry with high theoretical maturity,combines the mixed discrete thought and mathematical programming method to analyze the stability of masonry retaining wall slope considering pore water pressure and seismic action,and makes the following research.(1)Expounding the significance of the study on the stability of retaining wall slope,and pointing out that under the condition of pore water pressure and seismic action,the slope is very vulnerable to instability damage.The research status and simulation methods of pore water pressure and seismic action at home and abroad are introduced in detail.(2)Introducing the theory of limit analysis and the proof and inference of the upper limit method of plastic limit analysis are introduced.On the basis of the upp er bound method,a mathematical programming model of upper limit method for retaining wall slope is established by using the mixed discrete method,combining the upper bound theorem with the dynamic field and constraint regulation,and a program is compile d to calculate the ultimate bearing capacity.(3)Based on the limit analysis theory,combined with the mixed discrete idea and upper bound theorem,a mathematical programming model of upper limit method for retaining wall slope considering pore water pres sure is established.When simulating pore water pressure,the pore water pressure is regarded as external load by the method of water and soil separation,and the pore water pressure is taken as external power into the virtual work principle.The safety fa ctor of the model is solved by mathematical programming and optimization principle,and the slope stability is analyzed.(4)Based on the limit analysis theory,combined with the mixed discrete idea and upper bound theorem,the mathematical programming model of upper limit method for retaining wall slope considering earthquake action is established.The quasi-static method is used to simulate seismic force.Seismic intensity is 7,8 and 9 degrees,and the direction is the most disadvantageous direction for slope stability.The seismic force is regarded as an external load and the external power is taken into account in the principle of virtual work.The safety factor of the model is solved by mathematical programming and optimization principle,and the slope stability is analyzed.(5)Based on the limit analysis theory,combined with the mixed discrete idea and upper bound theorem,a mathematical programming model of upper limit method for retaining wall slope considering both pore water pressure and seismic action is established.Pore water pressure and seismic action are included in the virtual work principle.The safety factor of the model is calculated by mathematical programming and optimization principle,and the slope stability is analyzed.(6)This paper summarizes the content and existing problems of this study,and makes further prospects for the methods and follow-up research.