基于midasCivil的基坑支锚结构弹性支点法模拟分析

极限平衡法假定了基坑内侧的土抗力为被动土压力状态。对于有支撑的支护结构等值梁法,支点力的计算假定与支点刚度系数是无关的,在使用上受到较大的限制,从理论上也无法反映支护结构的真实工作状态。因此,考虑支撑点刚度及土体变形与应力状态的弹性支点法是一种趋势。弹性支点法分析计算可采用midasCivil中面弹性支承理论作为土体和支挡结构的接触边界条件,通过分析位移结果值,结合规范求解支撑反力和被动侧分布土压力,应用于工程设计中。

Elastic-reaction Method Simulation Analysis of Foundation Pit Support Structure Based on MidasCivil

Limit equilibrium method assumes that the pit inside of soil resistance to a passive earth pressure state.For the Supporting structure Equivalent Beam Method,calculation assumed and fulcrum stiffness coefficient is independent.It is larger restrictions on the use.It can not reflect the real state of the supporting structure.Therefore,considering the point stiffness,soil deformation and stress state of the elastic fulcrum is a trend.Elastic-reaction method analysis can use the surface elastic support theory by midas Civil.It can be used as a contact boundaryconditions between the soil and retaining structures,then analyzing the displacement value,solving support reaction force and the passive side of the distribution of earth pressure.The method applied to engineering design.