Numerical Analysis And Field Test Of Earth Pressure Against Rigid Retaining Wall In High-Speed Railway

The algorithmic method of the retaining wall unified not enough under load,and the result discrepancy enven larger. At the present time, there is no case study about earth pressure against retaining wall under train load.It is not clear about magnitude, distributing, a point of application resulted by composition of force of earth pressure against rigid retaining wall and train speed. Along with construction of highspeed railway, along with increasing speed of retaining wall that have teen built, It is very necessary to study earth pressure against retaining wall under train load.On the basis of summarizing the study data already existed,the author study magnitude and distributing of earth pressure of rigid retaining wall by theoretical arithmetic, numerical analysis and field test.The study objections of the thesis is the rigid retaining wall whose movement is outward and away from backfill.The author analysis earth pressure against retainingwall with coulomb and elasticity theory,and think into account night of retainingwall,load distance,hight of set slope and so on emphasisly.Study the earth pressure of field retainingwall of variable movement mode,variable height,variable load distance by imitately analysis.and conclude the variety law of distributing, a point of application,and coefficient of earth pressure,conclude the variety instance of displacement of retainingwall.Selecting two sections of banlance weight retainingwall and two sections of weight retainingwall on jiaoji route,anlysis the distributing of earth pressure against retainingwall resulting by deadweight,the change law with time of earth pressure against by retaining wall, attenuation rule of road bed dynamic stress, distributing of earth pressure against retaining wall resulting under train load and so on. The author draws a parallel between result test and theoretical analysis and numerical calculation. The outcome of the study reveals that the issue of the fied test is in conformity with the issue of the numerical computation essencely.The study regard that the computation of load earth pressure can adopt elastictheory method.The train load is not large to impact earth pressure against retainingwall.lt can heighten the safety factor proprietiely to consider the impaction of the train load in design of high speed railway retainingwall.