冲击荷载作用下粘土孔隙水压的数值分析

为了分析冲击荷载作用下粘土的孔隙水压力的增长规律，为分析粘土介质的动态响应、动力固结加固提供理论依据，将冲击瞬态荷载简化为三角形荷载，通过编制瞬变动态弹塑性有限元程序，对冲击荷载作用下粘土孔隙水压的动态响应进行了模拟，得出了冲击荷载作用下粘土孔隙水压的增长规律，发现孔隙水压力峰值无论是随水平距离还是随深度的增加均呈指数形式衰减，和实际工程施工中孔隙水压的监测数据相吻合。

Numerical analysis on pore pressure of clay under shock load

The growth of pore pressure of clay under shock load infuence effective stress and strength of clay directly. Numerical analysis on the growth principles of pore pressure of clay under shock load provides theoretical references for dynamic responses analysis of clay and dynamic consolidation of clay medium. The transient shock load has been simplified into trial anger load and the transient dynamic elastic plastic finite element program has been programed. The dynamic responses of pore pressure of clay under shock load has been simulated. Some growth principles of pore pressure of clay under shock load have been concluded. The peak pore pressure attenuates exponentially with the increase of the horizontal distance and the augmentation of the depth. Calculation and analyses are in good agreement with monitoring datas of practical engineering case.