摘要
根据变形模量与侧限压缩模量的定义,阐述了各自对应的应力状态。指出两模量无简单确定的大小关系,或者说不便简单进行对比,因为它们对应的应力状态不同。进而解释了为何软土在参考压力下一半极限剪应力对应的割线变形模量会大于参考压力下的侧限压缩模量,同时阐述了根据现场实测沉降,通过弹性沉降计算公式反算得到的变形模量为何较试验测得的侧限压缩模量大很多,并给出由室内试验测得的压缩模量估算实际地基变形模量以进行沉降计算的思路。
According to the definitions of deformation modulus and oedometer modulus,their corresponding stress states are explained respectively.It is pointed out that there is no simple and definite magnitude relationship between the two moduli,because they correspond to different stress states.Furthermore,it is explained why the secant deformation modulus corresponding to half the ultimate shear stress of soft soil under reference pressure is greater than the oedometer modulus under reference pressure.It is also explained why the deformation modulus back calculated by the foundation settlement calculation formula from the on-site measured settlement is much larger than the oedometer modulus measured by indoor tests,and ideas are given of estimating the actual foundation modulus based on the oedometer modulus obtained from indoor tests for settlement calculation.
作者
宋二祥
SONG Erxiang(Department of Civil Engineering,Tsinghua University,Beijing 100084)
出处
《地基处理》
2026年第2期210-212,共3页
Journal of Ground Improvement
关键词
变形模量
压缩模量
小应变模量
硬化土模型
deformation modulus
oedometer modulus
small strain modulus
hardening soil model
