孔压静探模型槽试验及成果分析

本文介绍了对以饱和粘性土为介质的模型槽中所进行的孔压静力触探(CPTU)试验,通过对试验数据的分析,得出探头贯入时周围土体的轴向附加应力和径向附加应力的变化及分布,锥尖、侧壁摩阻力以及超孔隙水压力的变化,以及停止贯入后孔压消散过程中探头周围土体的超孔压变化,从这些方面来探讨土中应力场的变化,附加应力的影响范围,临界深度现象以及超孔隙水压力的变化规律。

CPTU chamber test and analyzing its data

This paper mainly describes the CPTU (piezocone penetration test) experiment in the chamber filled with the saturated clay . And through analyzing the data of the experiment, the change and distribution of vertical additional stresses and radial additional stresses, the change of cone resistance, sleeve friction and excess pore water pressure generated by the probe penetrating, and the change of pore water pressure around the probe in the excess pore water pressure dissipation have been shown, then the variation of the stress field, the influence area of additional stresses, the phenomenon of the critical depth and changing rules of the excess pore water pressure have been discussed.