期刊论文

Laboratory Test Study on Creep Characteristics of Soft Soil

中文

湖南城市学院学报(自然科学版)

1672-7304

2017

26

3

1-5

10.3969/j.issn.1672-7304.2017.03.0001

2016JJ4013:湖南省自然科学基金 16A038:湖南省教育厅科学研究项目

本校为第一机构

为了研究杭甬高速铁路所经过地区的软黏土蠕变特性,利用改进的三轴蠕变仪,进行不同围压下三轴固结不排水蠕变试验.试验结果表明:该海相软土具有显著的非线性蠕变特性,偏应力水平越高,非线性程度越大;不同围压下软土的屈服应力不同,当应力水平低于屈服应力时,软黏土蠕变特性表现为线性黏弹性;当应力水平高于屈服应力时,软黏土的蠕变性状表现出显著的非线性黏塑性.故该软黏土的蠕变同时具有弹性、黏弹性及黏塑性特征,可将所研究的软黏土视为弹-黏弹-黏塑性体.

In order to study the creep characteristics of soft clay in the area of Hangzhou-Ningbo high-speed railway, the triaxial undrained consolidation shear creep test was carried out under different confining pressure by using improved triaxial creep tester.The experiment indicates that the marine clay creep＇s nonlinear feature is remarkable, which is revealed gradually with increase in stress; the yield stress of soft soil is different under different confining pressures, when the stress level is lower than the yield stress, the creep characterist...