1.引言人们都知道土的应力——应变与时间的依存关系。太沙基曾用支配体积应变的有效应力概念来说明压密现象。太沙基建立的有效应力概念具有划时代意义,这不仅为完善后来的土力学体系起到积极作用,而且它对于一元压密理论的研究起了很大作用.其中,像砂土在剪切时体积增大或减小孔隙压力现象,自 Reynodls 以来引起人们重视,斯开普顿和亨克等为说明压密、剪切时情况,把有效应力和孔隙压力连系起来, 1. INTRODUCTION People all know the stress of soil—the dependence of strain on time. Taisaki has used the concept of effective stress that dominates the volumetric strain to explain compaction. The concept of effective stress established by Taishaji has epoch-making significance, which not only plays a positive role in improving the subsequent soil mechanics system, but also plays a significant role in the study of the monastic compaction theory. Among them, like sand in shear The increase in volume or reduction in pore pressure has attracted attention since Reynodls, and Capekton and Genk have combined the effective stress and pore pressure in order to explain the conditions of compaction and shear.