振冲动力法加固地基的机理

从振冲动力原理出发，研究了振冲动力加固地基的瞬时过程中的波动理论，根据有效应力原理和土体中的应力－应变关系导出了振冲作用产生的波动方程，依据土力学和土动力学原理，研究了振冲动力作用下土层中超静孔压积累的规律－超静孔压积累微分方程和定解条件，研究结果表明振冲动力作用使得超静孔隙水压力波动上升，孔压波动上升与振动的频率有关，利用这一成果可计算土层的液化深度和强夯法进行抗震处理的加固深度，同时讨论了振冲动力作用时瑞雷波的影响。

Mechanism of Vibroflotation Dynamic Method for Improving Foundation

Based on soil mechanics and geo dynamics principle the wave theory of the vibroflotation dynamic method during improving foundation was studied. The wave equation of vibroflotation dynamic method is derived according to stress strain relationship and effective stress principle. The increasing rule of pore water pressure of vibroflotation dynamic method, i.e. the differential equation of pore water pressure accumulation and solving condition, is investigated. The research result shows that the increasing rule of pore water pressure is wavelike and relative to frequency of vibration, and which could be used to calculate the liquefaction depth of soil layer and the improvement depth of dynamic compaction method. The effect of Rayleigh wave is also discussed.