[1]卞夏,丁建文,史剑.考虑超固结比影响的硬黏土应力灵敏度变化规律[J].东南大学学报(自然科学版),2016,46(3):624-628.[doi:10.3969/j.issn.1001-0505.2016.03.028]
 Bian Xia,Ding Jianwen,Shi Jian.Variation law of stress sensitivity for stiff clay considering effects of overconsolidation ratio[J].Journal of Southeast University (Natural Science Edition),2016,46(3):624-628.[doi:10.3969/j.issn.1001-0505.2016.03.028]
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考虑超固结比影响的硬黏土应力灵敏度变化规律()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
46
期数:
2016年第3期
页码:
624-628
栏目:
土木工程
出版日期:
2016-05-20

文章信息/Info

Title:
Variation law of stress sensitivity for stiff clay considering effects of overconsolidation ratio
作者:
卞夏12丁建文3史剑3
1河海大学岩土力学与堤坝工程教育部重点实验室, 南京 210098; 2河海大学岩土工程科学研究所, 南京 210098; 3东南大学岩土工程研究所, 南京 210096
Author(s):
Bian Xia12 Ding Jianwen3 Shi Jian3
1Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
2Geotechnical Research Institute, Hohai University, Nanjing 210098, China
3Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China
关键词:
硬黏土 土结构性 应力灵敏度 超固结比
Keywords:
stiff clay soil structure stress sensitivity overconsolidation ratio
分类号:
TU41
DOI:
10.3969/j.issn.1001-0505.2016.03.028
摘要:
为了分析土结构性对强超固结性硬黏土力学性状的影响,提出了考虑超固结比影响的固有压缩线的概念,重新定义了考虑超固结比影响的硬黏土应力灵敏度.通过耦合超固结比和土结构性对硬黏土力学性状的影响,并将应力灵敏度的概念从单一应力水平拓展至当前应力水平,探讨了考虑超固结比影响的硬黏土应力灵敏度随应力水平的变化规律.结果表明:在半对数坐标系中,考虑超固结比影响的硬黏土应力灵敏度与重塑孔隙指数呈线性关系.不同硬黏土应力灵敏度随应力水平的变化规律能够通过孔隙指数差进行归一化处理.基于考虑超固结比影响的硬黏土应力灵敏度变化规律,提出了屈服后阶段硬黏土压缩曲线的计算模型.
Abstract:
To analyze the influences of soil structure on the mechanical behaviors of overconsolidated stiff clay, the intrinsic compression line considering the effect of the overconsoildaiton ratio is proposed. Accordingly, the stress sensitivity of stiff clay considering the effect of the overconsoildaiton ratio is redefined. By coupling the effects of soil structure and overconsolidation on the mechanical behaviors of overconsolidated stiff clay and extending the definition of stress sensitivity from single stress level to current stress level, the variation law of the stress sensitivity considering the effect of the overconsoildaition ratio with the stress level is investigated. The results show that in the semi-logarithm plot, there is a good linear relationship between the stress sensitivity of stiff clay considering the effect of the overconsolidation ratio and the intrinsic void index. The variation law of the stress sensitivity of different stiff clays with the stress level can be normalized by the void index difference. Based on the variation law of the stress sensitivity of stiff clay considering the effect of the overconsoildaition ratio, a computation model of the compression line for natural stiff clay at the post-yield state is also proposed.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2016-01-18.
作者简介: 卞夏(1988—),男,博士;丁建文(联系人),男,博士,副教授, jwding@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(41372309,41502263)、江苏省自然科学基金资助项目(BK20150819)、中央高校基本科研业务费专项资金资助项目(2015B00914)、“十二五”国家科技支撑计划资助项目(2015BAB07B06).
引用本文: 卞夏,丁建文,史剑.考虑超固结比影响的硬黏土应力灵敏度变化规律[J].东南大学学报(自然科学版),2016,46(3):624-628. DOI:10.3969/j.issn.1001-0505.2016.03.028.
更新日期/Last Update: 2016-05-20