风化花岗岩土的持水特性研究

卢有谦; 韦昌富; 蔡国庆; 赵成刚

doi:10.11779/CJGE2018S2020

风化花岗岩土的持水特性研究 English Version

1. 北京交通大学土木建筑工程学院,北京 100044;
2. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉 430071

基金项目: 国家自然科学基金优秀青年基金项目（51722802）; 国家自然科学基金项目（51722802,51678041）

详细信息

作者简介:
卢有谦(1988- ),男,博士研究生,主要从事环境岩土工程方面研究。E-mail: luyouqian@bjtu.edu.cn。

通讯作者:
蔡国庆，E-mail：guoqing.cai@bjtu.edu.cn

中图分类号: TU45
计量
- 文章访问数: 344
- HTML全文浏览量: 6
- PDF下载量: 202
出版历程
- 收稿日期: 2018-07-21
- 发布日期: 2018-10-29

Water-holding characteristics of weathered granite soils

1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China

摘要

摘要: 以不同风化程度的花岗岩双层土质边坡土体为研究对象,利用压力板法和饱和盐溶液蒸汽平衡法,研究了在全吸力范围内压实样的持水特性。实验结果表明,全风化土的进气值和残余吸力值均低于残积土的,且过渡区呈线性有较大的坡度。花岗岩风化程度差异产生不同的风化产物,影响土体的矿物成分与孔隙结构进而控制土体的持水特性。通过X-射线衍射实验分析土样的黏土矿物成分,采用硅酸盐化学全分析土体的化学成分和风化成矿情况,研究矿物成分对土体持水特性的影响;最后通过扫描电镜与压汞实验,验证分析孔隙结构与分布对持水特性的影响。
- 风化花岗岩土 /
- 全吸力范围 /
- 持水曲线 /
- 矿物成分 /
- 孔隙结构
- weathering granite soil /
- suction range /
- SWCC /
- mineral composition /
- pore structure

HTML全文

参考文献(16)

[1]	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.
[2]	谈云志, 孔令伟, 郭爱国, 等. 压实红黏土的持水性能与机制分析[J]. 岩土力学, 2011, 32(增刊1): 334-338. (TAN Yun-zhi, KONG Ling-wei, GUO Ai-guo, et al.Analysis of water holding capacity and mechanism of compacted lateritesoil[J]. Rock and Soil Mechanics, 2011, 32(S1): 334-338. (in Chinese))
[3]	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.
[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]	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.
[6]	GB50021—2001 岩土工程勘察规范[S]. 2009. (GB50021—2001 Geotechnical engineering specification[S]. 2009. (in Chinese))
[7]	GAO Y, SUN D A, ZHOU A.N Hydro-mechanical behaviour of unsaturated soil with different specimen preparations[J]. Canadian Geotechnical Journal, 2015, 53(6).
[8]	文宝萍, 胡艳青. 颗粒级配对非饱和黏性土基质吸力的影响规律[J]. 水文地质工程地质, 2008, 35(6): 50-55. (WEN Bao-ping, HU Yan-qing.Effect of particle size distribution on the metric suction of unsaturated clayey soils[J]. Hydrogeology & Engineering Geology, 2008, 35(6): 50-55. (in Chinese))
[9]	FREDLUND D G, RAHARDJO H.Soil mechanics for unsaturated soils[M]. New York: John Wiley & Sons, Inc, 1993.
[10]	PETERSEN L W, MOLDRUP P, JACOBSEN O H, et al.Relations between specific area and soil physical and chemical properties[J]. Soil Science, 1996, 161(1): 9-21.
[11]	MADSEN H B, JENSEN C R, BOYSEN T.A comparison of the thermocouple psychrometer and the pressure plate methods for determination of soil water characteristic curves[J]. Journal of Soil Science, 1986, 37(3): 357-362.
[12]	TULLER M, OR D. Water films and scaling of soil characteristic curves at low water contents[J]. Water Resources Research, 2005, 41(9): W09403 1-6.
[13]	LU N, KHORSHIDI M.Mechanisms for soil-water retention and hysteresis at high suction range[J]. Journal of Geotechnical & Geoenvironmental Engineering, 2015, 141(8): 04015032.
[14]	谭罗荣, 孔令伟. 某类红黏土的基本特性与微观结构模型[J]. 岩土工程学报, 2001, 23(4): 458-262. (TAN Luo-rong, KONG Ling-wei.Fundamental property and microstructure model of red clay[J]. Chinese Journal of Geotechnical Engineering, 2001, 23(4): 458-262. (in Chinese)).
[15]	KODIKARA J, BARBOUR S L, FREDLUND D G.Change in clay structure behaviour due to wetting and drying[C]// Proceedings of 8th Australian-Zealand Conference on Geomechanics. Hobart, 1999: 179-185.
[16]	VANAPALLI S K, FREDLUND D G, PUFAHL D E.The influence of soil structure and stress history on the soil-water characteristics of a compacted till[J]. Géotechnique, 1999, 49(2): 143-159.