低路堤软土地基在交通荷载作用下的动力特性试验研究

设计并制作了低路堤软黏土地基模型。测试了软黏土地基在交通荷载不同强度、不同频率下的动土压力和孔隙水压力;以及土压力和孔隙水压力随深度的变化。获得了低路堤软粘土地基在交通荷载作用下的动力特性发展规律。研究表明:在交通荷载循环作用下,无论荷载强度、荷载频率的大小,软黏土地基的土压力和孔压都是随着埋深的增加而呈衰减趋势。随着荷载频率的增加,土压和孔压的波动变化明显加剧,但压力值并不是随着荷载频率的增加而简单的增长或减小;随着荷载强度的加大,某一深度处土压力受到的最值变化不是很明显,而孔隙水压力却显著的发生了变化。

Model test on dynamic characteristics of low embankment on soft clay foundation under traffic loading

A model of low embankment on soft clay foundation was designed and filled.Its passive earth pressure and pore water pressure under traffic loading with different intensity and frequency were measured and the change of earth pressure and pore water pressure with depth were tested.The development law of dynamic characteristics of soft clay foundation under traffic loading was obtained.The results show that:under repeated traffic loading,no matter the size of the load intensity, load frequency, earth pressure and pore pressure of soft clay foundation are decreased with the increase of depth;With the increase of the load frequency, the fluctuation of earth pressure and pore pressure are obviously increased, but the pressure value are not simple to increase or decrease ;With the increase of the load intensity, the change of the soil pressure at a certain depth is not very obvious, but the pore water pressure is significantly changed.