非饱和砂中PHC管桩动力p－y曲线特性分析

摘要

Abts ract:Under the condition of earthquakes , unsaturated single-layer soil lateral stiffness is gradually increasing from top to bottom , the energy consumption of interaction between the PHC pipe pile and soil is smaller .PHC pipe pile dynamic p-y curve is impacted signifi-cantly by different seismic waves , but the lateral stiffness of soil has no obvious change .Plastic deformation occurs in surface soil under the earthquake , when the sand is dense, the depth of the plastic deformation will be reduced .%震动作用下，非饱和单层砂土侧向刚度自上而下逐渐增大，PHC管桩－土间相互作用耗能较小。不同的地震波对PHC管桩的动力p－y曲线影响显著，但侧向土体刚度没有明显变化。靠地表一定范围内的土体在地震会出现塑性变形，当砂土较密实时，塑性变形的深度会有所减小。