考虑孔隙比和水力路径影响的非饱和土土水特性研究

高游; 孙德安; 张俊然; 罗汀

doi:10.11779/CJGE201912003

考虑孔隙比和水力路径影响的非饱和土土水特性研究 English Version

高游^1, ,,
孙德安²,
张俊然³,
罗汀⁴

1. 宁波大学建筑工程与环境学院,浙江宁波 315211;
2. 上海大学土木工程系,上海 200444;
3. 华北水利水电大学河南省岩土力学与结构工程重点实验室,河南郑州 450045; 4.北京航空航天大学交通科学与工程学院,北京 100191

基金项目: 国家自然科学基金项目（41902279,41602295,51579005）

详细信息

作者简介:
高游(1989— ),男,讲师,博士,主要从事非饱和土力学的研究。E-mail: gaoyou@nbu.edu.cn。

通讯作者:
高游，E-mail：gaoyou@nbu.edu.cn

中图分类号: TU411
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出版历程
- 收稿日期: 2019-05-19
- 发布日期: 2019-12-24

Soil-water characteristics of unsaturated soils considering initial void ratio and hydraulic path

1. Faculty of Architecture, Civil Engineering and Environment, Ningbo University, Ningbo 315211, China;
2. Department of Civil Engineering, Shanghai University, Shanghai 200444, China;
3. Henan Province Key Laboratory of Rock and Soil Mechanics and Structural Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China;
4. School of Transportation Science and Engineering, Beihang University, Beijing 100191, China

摘要

摘要: 以非膨胀性黏土为试验研究的对象,利用压力板法研究了初始孔隙比对不同水力路径下非饱和压实土土水特性的影响。试验结果表明,不同初始孔隙比土水特征曲线均存在明显的滞洄现象;当吸力大于某一值时,以含水率与吸力关系表示的话,不同初始孔隙比主脱湿土水曲线几乎重叠;以饱和度与吸力关系表示,初始孔隙比对土水特征曲线存在较大的影响。还提出归一化处理全吸力范围内不同初始孔隙比土水特征曲线的方法。最后,在归一化的处理方法基础上,提出了考虑初始孔隙比影响的非饱和土滞洄特性的模拟方法,并利用相关实测数据加以验证。
- 非饱和土 /
- 压实样 /
- 孔隙比 /
- 土水特征曲线
Abstract: To investigate the effects of the initial void ratio on the soil-water characteristic curves of non-expansive clay under different hydraulic paths, the suction is imposed or measured using the pressure plate method. The experimental results show that the obvious hysteresis phenomenon can be observed in the soil water characteristic curve (SWCC) with different initial void ratios. The main drying SWCCs of compacted specimens with different void ratios coincide with each other at the suction higher than a specific suction value when they are expressed by the relation between suction and water content. When the SWCC is expressed by the relation between suction and degree of saturation, the influence of the initial void ratio is highlighted. Moreover, a method to normalize the main drying and wetting SWCC in full suction range is proposed. Finally, a method to describe the hydraulic hysteresis behavior of specimens with different initial void ratios is proposed, and the predicted results are compared well with measured values.
- unsaturated soil /
- compacted specimen /
- void ratio /
- soil-water characteristic curve

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参考文献(16)

[1]	FREDLUND D G, RAHARDJO H.Soil mechanics for unsaturated soils[M]. New York: John Wiley & Sons, Inc, 1993.
[2]	SUN D A, SHENG D C, XU Y F.Collapse behavior of unsaturated compacted clays with different initial densities[J]. Canadian Geotechnical Journal, 2007, 44(6): 673-686.
[3]	邹维列, 王协群, 罗方德, 等. 等应力和等孔隙比状态下的土-水特征曲线[J]. 岩土工程学报, 2017, 39(9): 1711-1717. (ZOU Wei-lie, WANG Xie-qun, LUO Fang-de, et al.Experimental study on SWCCs under equal stress and equal void ratio states[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(9): 1711-1717. (in Chinese))
[4]	陈正汉. 非饱和土与特殊土力学的基本理论研究[J]. 岩土工程学报, 2014, 36(2): 201-272. (CHEN Zheng-han.On basic theories of unsaturated soils and special soils[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(2): 201-272. (in Chinese))
[5]	张雪东, 赵成刚, 蔡国庆, 等. 土体密实状态对土-水特征曲线影响规律研究[J]. 岩土力学, 2010, 31(5): 1436-1468. (ZHANG Xue-dong, ZHAO Cheng-gang, CAI Guo-qing, et al.Research on influence of soil density on soil-water characteristic curve[J]. Rock and Soil Mechanics, 2010, 31(5): 1436-1468. (in Chinese))
[6]	蔡国庆, 张策, 李舰, 等. 考虑初始干密度影响的SWCC预测方法研究[J]. 岩土工程学报, 2018, 40(增刊2): 27-31. (CAI Guo-qing, ZHANG Ce, LI Jian, et al.Prediction method for SWCC considering initial dry density[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 27-31. (in Chinese))
[7]	褚峰, 邵生俊, 陈存礼. 干密度和竖向应力对原状非饱和黄土土水特征影响的试验研究[J]. 岩石力学与工程学报, 2014, 33(2): 413-420. (CHU Feng, SHAO Sheng-jun, CHEN Cun-li.Experimental research on influences of dry density and vertical stress on soil-water characteristic curves of intact unsaturated loess[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(2): 413-420. (in Chinese))
[8]	NG C W W, PANG Y W. Experimental investigations of the soil-water characteristics of a volcanic soil[J]. Canadian Geotechnical Journal, 2000, 37(6): 1252-1254.
[9]	SALAGER S, ALESSIO M, FERRARI A, et al.Investigation into water retention behavior of deformable soils[J]. Canadian Geotechnical Journal, 2013, 50(2): 200-208.
[10]	FREDLUND D G, XING A.Equation for the soil-water characteristic curve[J]. Canadian Geotechnical Journal, 1994, 31(4): 521-532.
[11]	周葆春, 孔令伟, 陈伟, 等. 荆门膨胀土土-水特征曲线特征参数分析与非饱和抗剪强度预测[J]. 岩石力学与工程学报, 2010, 29(5): 1052-1059. (ZHOU Bao-chun, KONG Ling-wei, CHEN Wei, et al.Analysis of characteristic parameters of soil-water characteristic curve(SWCC) and unsaturated shear strength prediction of Jingmen expansive soil[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(5): 1052-1059. (in Chinese))
[12]	GALLIPOLI D, WHEELER S J, KARSTUNEN M.Modelling the variation of degree of saturation in a deformable unsaturated soil[J]. Géotechnique, 2003, 53(1): 105-112.
[13]	VANAPALLI S K, FREDLUND D G, PUFAHL D E, et al.Model for the prediction of shear strength with respect to soil suction[J]. Canadian Geotechnical Journal, 1996, 33(3): 379-392.
[14]	ZHOU A.A contact angle-dependent hysteresis model for soil-water retention behaviour[J]. Computers & Geotechnics, 2013, 49(4): 36-42.
[15]	AZIZI A, JOMMI C, MUSSO G.A water retention model accounting for the hysteresis induced by hydraulic and mechanical wetting-drying cycles[J]. Computers & Geotechnics, 2017, 87: 86-98.
[16]	ROMERO E, GENS A, LLORET A.Water permeability, water retention and microstructure of unsaturated compacted Boom clay[J]. Engineering Geology, 1999, 54(1/2): 117-127.