[1]钱森,史剑,丁建文.压缩过程中天然沉积土应力灵敏度的变化规律[J].东南大学学报(自然科学版),2015,45(6):1180-1184.[doi:10.3969/j.issn.1001-0505.2015.06.028]
 Qian Sen,Shi Jian,Ding Jianwen.Variation reqularity of stress sensitivity of natural clay during compression[J].Journal of Southeast University (Natural Science Edition),2015,45(6):1180-1184.[doi:10.3969/j.issn.1001-0505.2015.06.028]
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压缩过程中天然沉积土应力灵敏度的变化规律()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
45
期数:
2015年第6期
页码:
1180-1184
栏目:
土木工程
出版日期:
2015-11-20

文章信息/Info

Title:
Variation reqularity of stress sensitivity of natural clay during compression
作者:
钱森史剑丁建文
东南大学交通学院, 南京 210096
Author(s):
Qian Sen Shi Jian Ding Jianwen
School of Transportation, Southeast University, Nanjing 210096, China
关键词:
天然沉积土 土结构性 应力灵敏度 一维压缩
Keywords:
natural clay soil structure stress sensitivity one-dimensional compression
分类号:
TU411
DOI:
10.3969/j.issn.1001-0505.2015.06.028
摘要:
为了描述压缩过程中天然沉积土应力灵敏度随固结压力的变化规律,基于耦合应力灵敏度的概念和Liu-Cater模型的建模思路,将Liu-Cater模型引入应力灵敏度评价体系中,建立了应力灵敏度变化模型.将已有文献中天然沉积土原状样与重塑样的一维压缩试验实测结果与应力灵敏度变化模型预测结果相比较,以验证所提模型的适用性.结果表明:应力灵敏度变化模型预测结果与试验实测结果均具有良好的一致性;应力灵敏度在固结屈服压力时处于最大值,之后随固结压力的增大而逐渐减小至1;应力灵敏度衰减指数的大小主要决定于土的种类及土结构性的特征,软黏土的应力灵敏度衰减指数通常大于硬黏土;土结构性破坏越剧烈,应力灵敏度衰减指数越高.
Abstract:
In order to describe the variation reqularity of the stress sensitivity of natural clay with the consolidation stress during compression, a stress sensitivity change model was proposed by introducing the Liu-Cater model into the stress sensitivity framework based on the definition of the stress sensitivity and the modeling idea of the Liu-Cater model. The applicability of the proposed model was verified by comparing the simulation results of the stress sensitivity change model with the one-dimensional compression test results of undisturbed and remolded samples of natural clay from the literature. The study results show that the simulation results of the stress sensitivity change model agree well with the test results. The stress sensitivity reaches a maximum value under the consolidation yield stress and gradually decreases to 1 with the further increase of the consolidation stress. The reduction index of the stress sensitivity depends on the soil type and the characteristic of soil structure. The reduction index of the stress sensitivity of soft clay is usually higher than that of stiff clay. The more rapid the destruction of soil structure, the higher the reduction index of the stress sensitivity.-收稿日期: 2015-06-24.〓作者简介: 钱森(1987—), 男, 博士生;丁建文(联系人), 男,博士,副教授, jwding2006@163.com.基金项目: 国家自然科学基金资助项目(41372309, 51378118)、水利部公益性行业科研专项经费资助项目(201401006)、江苏省普通高校研究生科研创新计划资助项目(CXLX13_111).引用本文: 钱森, 史剑, 丁建文. 压缩过程中天然沉积土应力灵敏度的变化规律.[J].东南大学学报:自然科学版,2015,45(6):1180-1184. [doi:10.3969/j.issn.1001-0505.2015.06.028]

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备注/Memo

备注/Memo:
收稿日期: 2015-06-24.
作者简介: 钱森(1987—), 男, 博士生;丁建文(联系人), 男,博士,副教授, jwding2006@163.com.
基金项目: 国家自然科学基金资助项目(41372309, 51378118)、水利部公益性行业科研专项经费资助项目(201401006)、江苏省普通高校研究生科研创新计划资助项目(CXLX13_111).
引用本文: 钱森, 史剑, 丁建文. 压缩过程中天然沉积土应力灵敏度的变化规律.[J].东南大学学报:自然科学版,2015,45(6):1180-1184. [doi:10.3969/j.issn.1001-0505.2015.06.028]
更新日期/Last Update: 2015-11-20