[1]殷杰,洪振舜,高玉峰.天然沉积连云港软黏土的屈服特性[J].东南大学学报(自然科学版),2009,39(5):1059-1064.[doi:10.3969/j.issn.1001-0505.2009.05.038]
 Yin Jie,Hong Zhenshun,Gao Yufeng.Yielding characteristics of natural soft Lianyungang clay[J].Journal of Southeast University (Natural Science Edition),2009,39(5):1059-1064.[doi:10.3969/j.issn.1001-0505.2009.05.038]
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天然沉积连云港软黏土的屈服特性()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
39
期数:
2009年第5期
页码:
1059-1064
栏目:
土木工程
出版日期:
2009-09-20

文章信息/Info

Title:
Yielding characteristics of natural soft Lianyungang clay
作者:
殷杰12 洪振舜3 高玉峰1
1 河海大学岩土工程研究所, 南京 210098; 2 江苏大学理学院, 镇江 212013; 3 东南大学交通学院, 南京 210096
Author(s):
Yin Jie12 Hong Zhenshun3 Gao Yufeng1
1 Geotechnical Research Institute, Hohai University, Nanjing 210098, China
2 Faculty of Science, Jiangsu University, Zhenjiang 212013, China
3 School of Transportation, Southeast University, Nanjing 210096, China
关键词:
不扰动样 屈服特性 屈服轨迹 流动法则
Keywords:
undisturbed samples yielding characteristics yield locus flow rule
分类号:
TU411
DOI:
10.3969/j.issn.1001-0505.2009.05.038
摘要:
为了研究天然沉积结构性软黏土的屈服特性,采用大直径PVC管取样器获取连云港地区地表下2.5 m处的不扰动样,进行一维固结和应力路径三轴试验.一维固结试验结果表明, 天然沉积连云港软黏土具有较强的结构性. GDS三轴的不同应力路径试验结果表明,无论以体积变形还是剪切变形为主的应力路径下,连云港软黏土的应力应变曲线都有明显的屈服特征.根据试验各应力路径得到的屈服点,可以得到连云港软黏土的初始屈服轨迹大致呈倾斜的椭圆形状,与Nakano等人模型的屈服面比较吻合.沿各应力路径屈服后塑性应变方向与该模型屈服面法线方向的夹角在-22°~33°范围之内变化,表明屈服后塑性流动方向可简单采用相关联流动法则来描述.
Abstract:
In order to describe the yielding characteristics of natural soft clay, one dimensional oedometer tests and stress-path triaxial tests on GDS(geotechnical digital system)triaxial apparatus were conducted on undisturbed Lianyungang clay obtained by large diameter PVC(polyvinglchloride)samplers from depths of 2.5m underground. Oedometer tests results show that soft Lianyungang clay is a strongly structured soil. And stress-path triaxial tests results show that remarkable yielding behavior is found in stress-strain relations, no matter whether the stress paths are controlled by volume or shear deformation. Yielding curve obtained by connecting the yield points under different stress paths shows an incline elliptical shape, which agrees with the yield curve in the model proposed by Nakano et al. Angles between direction of plastic flow under different stress paths and the normal of yield curve of Nakano’s model vary from -22° to 33°, which suggests that the direction of plastic flow in the post yield state can simply described by the associated flow rule.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 殷杰(1982—), 男, 博士生; 洪振舜(联系人), 男, 博士,教授, 博士生导师,zshong@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(50878050)、国家高技术研究发展计划(863计划)资助项目(2007AA11Z135).
引文格式: 殷杰,洪振舜,高玉峰.天然沉积连云港软黏土的屈服特性[J].东南大学学报:自然科学版,2009,39(5):1059-1064. [doi:10.3969/j.issn.1001-0505.2009.05.038]
更新日期/Last Update: 2009-09-20