岩土力学2017，Vol.38Issue(12)：3590-3596,7.DOI:10.16285/j.rsm.2017.12.025
上海典型黏土小应变特性的试验研究
Laboratory test of small-strain characteristics of typical Shanghai cohesive soils
摘要
Abstract
The stiffness of soils at small strain level is different from that at large strain level obtained by normal triaxial tests.Small-strain characteristics of soil play an important role in the analysis of deformation in deep excavations,tunnels and other underground engineering.A series of static triaxial tests equipped with Hall Effect local strain transducers and dynamic tests using resonant column with bender element are carried out to study the small-strain characteristics of typical Shanghai natural clays (i.e.Layer2～Layer6).The results of this study show that the shear modulus increases with the increase of depth of soil layer.Shear modulus of the over-consolidated Layer 6 decays more rapidly than that of the other normally consolidated layers (i.e.Layer 2～ Layer 5).The initial shear modulus and the normalized shear modulus degradation are obtained by the resonant column.Both the triaxial tests and the dynamic tests can reveal the non-linear decay trend of shear modulus with the increasing of shear strain.关键词
上海黏性土/小应变特性/刚度衰减/初始剪切模量/非线性Key words
Shanghai cohesive soils/small-strain characteristic/stiffness decay/initial shear modulus/non-linear分类
数理科学引用本文复制引用
张娇,王卫东,徐中华,李青..上海典型黏土小应变特性的试验研究[J].岩土力学,2017,38(12):3590-3596,7.基金项目
上海市浦江人才计划项目(No.15PJ1433500) （No.15PJ1433500）
“十二五”国家科技支撑计划课题(No.2012BAJ01B02).This work was supported by the Shanghai Pujiang Program (15PJ1433500) and the Supporting Program of the “Twelth Five-year Plan” for Sci & Tech Research of China (2012BAJ01B02). （No.2012BAJ01B02）
