土的压缩模量与变形模量的理论关系

Theoretical relation betweencompression modulus and deformation modulus of soil

在实际工程中经常用到土的变形模量,由于测试变形模量需要花费较多的时间和费用,故常常通过压缩模量来估算变形模量,但这种估算有很大争议。本文首先指出长期公认的变形模量与压缩模量间的关系式E_(0)=βE_(s)中存在的问题,然后重新推导了它们的关系式E_(0)=β′E_(s),考虑到土的结构性、应力历史条件以及土体扰动,最后建立了一种新的变形模量与压缩模量的关系式E_(0)=αE_(s)。

Soil modulus of deformation is often used in practical engineering,which was usually estimated with soil modulus of compression since more time and more cost are taken for measuring soil modulus of deformation than soil modulus of compression.But there is big dispute about this estimated method.Issues related to the widely acknowledged equation are addressed in this work.Subsequently,a novel theoretical relationshipbetween the deformation modulus and compression modulus,was developed.Finally,an additional relationship between the deformation modulus and compression modulus,was developed to account for the effects of stress history,soil structure,and soil disturbance etc.