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营口软土的固结不排水剪切蠕变特性
引用本文:王常明,黄超,张浩,张先伟,李军霞.营口软土的固结不排水剪切蠕变特性[J].吉林大学学报(地球科学版),2009,39(4).
作者姓名:王常明  黄超  张浩  张先伟  李军霞
作者单位:1. 吉林大学,建设工程学院,长春,130026
2. 上海申元岩土工程有限公司,上海,200011
基金项目:国家自然科学基金项目(40572153)
摘    要:利用自行改装后的三轴蠕变仪对海相沉积的营口软土进行蠕变试验,获得了在不同围压、不同偏应力条件下的剪切应变与时间关系数据。分析表明:(1)固结不排水蠕变中没有体积变化,不同偏应力下剪切蠕变可用对数形式表达;(2)固结不排水剪切蠕变在低应力水平下表现为线性粘弹性,而高应力水平时则具非线性的特性。由此,提出了描述软土蠕变规律的Singh-Mitchell经验模型和五参数的广义Kelvin模型,并确定了相应的模型参数。与试验数据拟合发现:Singh-Mitchell经验模型对应力水平为20%~80%时具有较高的拟合精度;Kelvin模型中的变形模量和粘滞系数均不为常数。

关 键 词:营口软土  剪切蠕变  三轴蠕变试验  蠕变模型  

Creep Characteristics for Consolidated-Undrained Triaxial Compression of Yingkou Soft Soil
WANG Chang-ming,HUANG Chao,ZHANG Hao,ZHANG Xia-wei,LI Jun-xia.Creep Characteristics for Consolidated-Undrained Triaxial Compression of Yingkou Soft Soil[J].Journal of Jilin Unviersity:Earth Science Edition,2009,39(4).
Authors:WANG Chang-ming  HUANG Chao  ZHANG Hao  ZHANG Xia-wei  LI Jun-xia
Institution:WANG Chang-ming1,HUANG Chao1,ZHANG Hao2,ZHANG Xia-wei1,LI Jun-xia11.College of Construction Engineering,Jilin University,Changchun 130026,China2.Shanghai Shenyuan Geotechnical Engineering Co.Ltd.,Shanghai 200011,China
Abstract:A creep test of marine deposit soft soil of Yingkou has been carried on the refitted triaxial shear creep apparatus.The relationship between shear strain and time of Yingkou soft soil is obtained under a series of different cell pressures and different deviator stresses.The analysis of the results show as follow:(1)The consolidated-undrained creep,which doesn't include the volume strain,can be expressed by logarithmic functions as a type of under a different deviator stress.(2)The shear creep behaves in a l...
Keywords:Yingkou soft soil  shearing creep  triaxial creep test  creep model  
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