非饱和土的土水特征曲线试验研究

梅岭; 姜朋明; 李鹏; 周爱兆

非饱和土的土水特征曲线试验研究 English Version

江苏科技大学土木工程与建筑学院，江苏镇江 212003

基金项目: 江苏省社会发展项目（BE2011746）；江苏省国土资源厅自然科学基金项目（2009015）；住建部研究开发项目（2011-K3-37）

详细信息

作者简介:
梅岭(1982- )，男，江苏东台人，讲师，主要从事边坡工程等方面的研究。E-mail: mling530@163.com。

中图分类号: TU443
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出版历程
- 收稿日期: 2013-02-27
- 发布日期: 2013-07-18

Soil-water characteristic curve tests on unsaturated soil

School of Civil and Architecture Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China

摘要

摘要: 利用GEO-Experts应力相关的土水特征曲线压力板仪对镇江某工程不同深度的重塑土样进行土水特征曲线试验研究，并对试验结果的影响因素进行分析。研究发现，各深度下的土样在脱水过程中，随着基质吸力的增大，土样的体积含水率逐渐减小；吸水过程中，随之基质吸力的减小，土样的体积含水率逐渐增大；变化相同的基质吸力值，表层土体比深层土体有更大的体积含水率的变化；土样在完成脱水过程后再进行吸水试验，土样不可能完全回复到原来的状态；分析了影响试验结果的主要因素，并提出了相应的减小误差的措施，从而为本地区降雨入渗对边坡土体抗剪强度的影响以及稳定性影响研究打下基础。
- 非饱和土 /
- 土水特征曲线试验 /
- 基质吸力 /
- 体积含水率 /
- 影响因素
Abstract: In order to study the soil and water characteristic curve of remolded soil samples at different depths of soil, an experiment is done in a project in Zhenjiang using the stress-related GEO-Experts soil and water characteristic curve pressure plate apparatus. The factors influencing the test consequences are also analyzed in the experiment. According to the tests, with the increasing matrix suction, the volumetric water content of soil gradually decreases, during the dehydration process of soil samples at different depths. However, when the soil samples are in the process of absorbing water, the results are on the contrary. And with the same variable quantity of matrix suction values, the greater the soil depth, the more change the water content. What’s more, even if the soil samples absorb water again, they will not return to the original state when they have finished the dehydration process. In addition, the main influencing factors are analyzed, and several corresponding methods are given. It is helpful to the research on the influence of rainfall infiltration on the soil shear strength in local region and the slope stability.
- unsaturated soil /
- soil-water characteristic curve test /
- matric suction /
- volumetric water content /
- influence factor

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参考文献(1)

FREDLUND D G,RAHARDJO. 非饱和土力学[M]. 陈仲颐, 张在明, 陈愈炯, 等译.北京:中国建筑工业出版社, 1997.(FREDLUND D G,RAHARDJO. Unsaturated soil mechanics[M]. CHEN Zhong-yi, ZHANG Zai-ming, CHEN Yu-jiong, trans.Beijing:China Architecture & Building Press, 1997. (in Chinese))
BISHOP A W,ALPAN I,BLIGHT G E,et al. Factors controlling the shear strength of partly saturated cohesive soils[C]// ASCE Research Conference on the Shear Strength of Cohesive Soils, University of Colorado, 1960: 503-532.
熊承仁,刘宝琛,张家生. 重塑黏性土的基质吸力与土水分及密度状态的关系[J]. (岩石力学与工程学报), 2005, 24(2): 321-327.(XIONG Cheng-ren,LIU Bao-cheng,ZHANG Jia-sheng. Relation of matric suction with moisture state and density state of remolded cohesive soil[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(2): 321-327. (in Chinese))
栾茂田,李顺群,杨庆. 非饱和土的理论土-水特征曲线[J]. (岩土工程学报), 2005, 27(6): 611-615.(LUAN Mao-tian,LI Shun-qun,YANG Qing. Theoretical soil-water characteristic curve for unsaturated soils[J]. Chinese Journal of Geotechnical Engineering, 2005, 27(6): 611-615. (in Chinese))
陈正汉. 重塑非饱和黄土的变形、强度、屈服和水量变化特性[J]. (岩土工程学报), 1999, 21(1): 82-90.(CHEN Zhen-han. Deformation, strength, yield and moisture change of a remolded unsaturated loess[J]. Chinese Journal of Geotechnical Engineering, 1999, 21(1): 82-90. (in Chinese))
殷宗泽,周建,赵仲辉,等. 非饱和土本构关系及变形计算[J]. (岩土工程学报), 2006, 28(2): 137-146.(YIN Zong-ze,ZHOU Jian,ZHAO Zhong-hui,et al. Constitutive relations and deformation calculation for unsaturated soils[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(2): 137-146. (in Chinese))
MEI Guo-xiong,CHEN Qi-ming,JIANG Peng-ming. Stress strain relationship of unsaturated cohesive soil[J]. Journal of Central South University of Technology, 2010(17): 653-657.