压缩条件下非饱和黄土的结构流体等效应力特性

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (0 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要对不同含水率的西安原状、重塑及人工结构性黄土进行压缩试验，依据变形等效原则，用同一固结孔隙比下非饱和黄土与相同干密度饱和黄土的应力之差确定结构流体等效应力，探讨结构流体等效应力的特性。分析结果表明：西安原状、重塑及人工结构性黄土的结构流体等效应力与总应力及饱和度之间呈幂函数关系，这与其他地区原状黄土定性上相同，结构流体等效应力的变化规律具有很强的普适性。结构流体等效应力能够反映黄土的结构性、湿度及应力的变化，其幂函数表达式中参数与含水率、结构性、干密度有关。根据此幂函数关系式可以确定湿载耦合作用下非饱和黄土的结构流体等效应力，进而得到非饱和黄土的有效应力及有效应力压缩曲线。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：土力学, 非饱和黄土, 压缩试验, 结构流体等效应力, 湿载耦合, 人工结构性黄土

Abstract：The compression tests are conducted on Xi?an intact and remoulded as well as artificially structural loesses under different moisture contents. Based on the principle of equivalent deformation，the equivalent stress of structural fluid is ascertained by using compressive stress difference between unsaturated and saturated loesses which have the same dry density and consolidation void ratio. The characteristics of equivalent stress of structural fluid are investigated. The research result indicates that the relationship between equivalent stress of structural fluid and stress as well as degree of saturation on Xi?an intact and remoulded as well as artificially structural loesses is power function，which is the same as that on the loess of other regions qualitatively. The variation regularity of equivalent stress of structural fluid is successfully universal. The changes of structural property and moisture content of loess as well as stress can be reflected by the equivalent stress of structural fluid；and the parameters of power function equation of equivalent stress of structural fluid are relative to moisture content and structural property as well as dry density. The equivalent stress of structural fluid under the condition of coupling of stress and moisture is calculated by the power function equation. Furthermore，effective stress and the compression curves of effective stress of unsaturated loess can be obtained.

Key words： soil mechanics unsaturated loess compression tests equivalent stress of structural fluid coupling of stress and moisture artificially structural loess

收稿日期: 2010-04-01

引用本文:

陈存礼1，褚峰1，郭娟2，曹程明3，董玉柱1. 压缩条件下非饱和黄土的结构流体等效应力特性[J]. 岩石力学与工程学报, 2011, 30(S1): 3165-3171.
CHEN Cunli1，CHU Feng1，GUO Juan2，CAO Chengming3，DONG Yuzhu1. CHARACTERISTICS OF EQUIVALENT STRESS OF STRUCTURAL FLUID OF UNSATURATED LOESS UNDER COMPRESSION. , 2011, 30(S1): 3165-3171.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/IS1/3165

[4]	张炜，张苏民. 非饱和黄土地基的变形特性[J]. 岩土工程学报，1998，20(4)：98-101.(ZHANG Wei，ZHANG Sumin. The deformation characteristics of unsaturated loess foundation[J]. Chinese Journal of Geotechnical Engineering，1998，20(4)：98-101.(in Chinese))
[6]	陈存礼，高鹏，胡再强. 黄土的增湿变形特性及其与结构性的关系[J]. 岩石力学与工程学报，2006，25(7)：1 352-1 360.(CHEN Cunli，GAO Peng，HU Zaiqiang. Moistening deformation characteristic of loess and its relation to structure[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(7)：1 352-1 360.(in Chinese)) " target="_blank">
[8]	陈存礼，曹程明，王晋婷，等. 湿载耦合作用下结构性黄土的压缩变形模式研究[J]. 岩土力学，2010，31(1)：39-45.(CHEN Cunli，CAO Chengming，WANG Jinting，et al. Modeling compression of structural loess under coupling of stress and moisture[J]. Rock and Soil Mechanics，2010，31(1)：39-45.(in Chinese)) " target="_blank">
[2]	谢定义. 试论我国黄土力学研究中的若干新趋向[J]. 岩土工程学报，2001，23(1)：3-13.(XIE Dingyi. Exploration of some new tendencies in study of loess mechanics[J]. Chinese Journal of Geotechnical Engineering，2001，23(1)：3-13.(in Chinese))
[7]	张茂花，谢永利，刘保健. 基于割线模量法的黄土增湿变形本构关系研究[J]. 岩石力学与工程学报，2006，25(3)：609-617.(ZHANG Maohua，XIE Yongli，LIU Baojian. Study on constitutive relation of loess moistening deformation based on secant-modulus method[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(3)：609-617.(in Chinese))
[9]	谢定义，冯志焱. 对非饱和土有效应力研究中若干基本观点的思辨[J]. 岩土工程学报，2006，28(2)：170-173.(XIE Dingyi，FENG Zhiyan. Consideration of some fundamental viewpoints in studying effective stress of unsaturated soils[J]. Chinese Journal of Geotechnical Engineering，2006，28(2)：170-173.(in Chinese))
[11]	胡再强，沈珠江，谢定义. 非饱和黄土的结构性研究[J]. 岩石力学与工程学报，2000，19(6)：775-779.(HU Zaiqiang，SHEN Zhujiang，XIE Dingyi. Research on structural behavior of unsaturated loess[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(6)：775-779.(in Chinese))
[10]	刘保健，谢定义，郭增玉. 黄土地基增湿变形的实用算法[J]. 岩土力学，2004，25(2)：270-274.(LIU Baojian，XIE Dingyi，GUO Zengyu. A practical method for moistening deformation of loess foundation[J]. Rock and Soil Mechanics，2004，25(2)：270-274.(in Chinese)) " target="_blank">
[12]	邢义川. 黄土力学性质研究的发展和展望[J]. 水力发电学报，2000，(4)：54-65.(XING Yichuan. Development and prospect of mechanical properties of loess[J]. Journal of Hydroelectric Engineering，2000，(4)：54-65.(in Chinese)) " target="_blank">
[1]	刘祖典. 黄土力学与工程[M]. 西安：陕西科学技术出版社，1997.(LIU Zudian. Mechanics of loess and engineering[M]. Xi?an：Shaanxi Science and Technology Press，1997.(in Chinese)) " target="_blank">
[3]	高国瑞. 黄土湿陷变形的结构理论[J]. 岩土工程学报，1990，12(4)：1-10.(GAO Guorui. A structure theory for collapsing deformation of loess[J]. Chinese Journal of Geotechnical Engineering，1990，12(4)：1-10.(in Chinese))
[5]	张苏民，郑建国. 湿陷性黄土(Q3)的增湿变形特征[J]. 岩土工程学报，1990，12(4)：21-31.(ZHANG Sumin，ZHENG Jianguo. The deformation characteristics of collapsible loess(Q3) during moistening process[J]. Chinese Journal of Geotechnical Engineering，1990，12(4)：21-31.(in Chinese))