Calculation Method Of Landslide Thrust Based On Improved M?P Method And Its Engineering Application

Anti-slide pile is a common retaining structure in landslide treatment,it has been widely used in slope reinforcement engineering.Whether the anti-slide pile design is reasonable or not determines the cost of the reinforcement project and the slope can be effectively reinforced to the design requirements.In the design of anti-slide pile,the first step is to determine how much support is required for the slope Then the anti-slide pile is designed according to the supporting force.At present,the theory of slope reinforcement by antislide piles is not perfect,the transfer coefficient explicit solution and implicit solution are mainly used to solve the resistance of anti-slide pile,the calculated landslide thrust is taken as the supporting resistance.Results of two methods for slope reinforcement,the factor of safety of the reinforced slope is not consistent with the design factor of safety,difficult to represent design goals.In this paper,the method of calculating slope stabilizing force based on Morgenstern-Price method is studied,in the force analysis of strip the action force of anti-slide pile is considered,the support force can be obtained quickly by simple algebraic iteration,the slope is reinforced by the supporting resistance obtained by this method,the safety factor of the reinforced slope is consistent with the design factor of safety.A numerical example is given to compare with the traditional method,the applicability of the method is verified,the research results can provide theoretical reference for landslide treatment.Finite element software ABAQUS is used to simulate a landslide case in Yuyao.The factors affecting the slope reinforcement effect and the optimum design of anti-slide piles are studied,the main research contents are as follows:1)Based on the improved Morgenstern-Price method,the action force of anti-slide pile is considered in the force analysis of strip,the formulas for calculating the supporting force and checking the factor of safety of the slope reinforced by anti-slide piles are derived,the numerical example is compared with the traditional method,the results show that the proposed method can effectively reinforce the slope to the design factor of safety,it is superior to the traditional calculation method.2)Combined with practical engineering cases,the limit equilibrium method and the finite element software are used to simulate the model,evaluation of slope stability under natural and saturated conditions.The results shows that the slope is basically stable under natural working conditions,the slope is in unstable state under saturated condition,needs to be reinforced.The support force required to reinforce the slope to the design factor of safety is calculated,it provides reference for slope reinforcement design.3)Several factors affecting the reinforcement effect of anti-slide piles are analyzed,and it turns out the larger the pile length and diameter,the better the slope stability,the influence on slope stability increases first and then decreases,pile length and pile diameter should not be too large considering engineering cost factors,the optimum design of slope reinforced by anti-slide piles is carried out in combination with various factors.Figure [41] Table [15] Reference [74]...