各向异性渗透系数随应变场动态变化分析

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (822 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要渗透系数是应力场与渗流场相互影响、相互耦合的桥梁，只有建立渗透系数与应力场或应变场的关系式，才能体现应力场对渗流场的影响，实现真正的渗流耦合分析。基于三维比奥固结渗流耦合理论，以Kozeny-Caman方程为基础，建立各向异性渗透系数与体应变之间的关系式，利用FLAC3D中嵌入的FISH语言编制相应程序，对土体单元赋予动态的渗透系数，实现应力场对渗流场的影响，进而实现应力场、渗流场两场真正的渗流耦合分析，并以基坑工程为例进行算例验证。研究表明，渗透系数随应变场(应力场)的变化而变化，当产生负的体应变时，渗透系数减小，产生正的体应变时，渗透系数增大，而且体应变对水平向渗透系数的影响较大，为岩土工程的动态渗流耦合分析提供参考。

	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 ：渗流力学, 应力场, 渗流场, 体应变, 各向异性渗透系数, 动态变化

Abstract：Permeability coefficient is a bridge of linking stress field and seepage field. Establishing relationship between permeability coefficient and stress field or seepage field can reflect the influence of stress field on seepage field and achieve real seepage coupling analysis. Based on three-dimensional seepage coupling Boit consolidation theory，the relationship between anisotropic permeability coefficient and volumetric strain is built on the basis of Kozeny-Caman equation，and relevant program is embedded with FISH program in FLAC3D software. Then soil mass unit is assigned dynamic permeability coefficients to reflect the influence of stress field on seepage field，realizing real seepage coupling analysis of stress field and seepage field. A case study of foundation pit is presented for validation. Result shows that permeability coefficient changes with strain field or stress field. The permeability coefficient decreases with negative volumetric strain but increases with positive volumetric strain. The volumetric strain has larger influence on horizontal permeability coefficient than vertical permeability coefficient. It may provide a reference for dynamic seepage coupling analysis of geotechnical engineering.

Key words： seepage mechanics stress field seepage field volumetric strain anisotropic permeability coefficient dynamic change

收稿日期: 2013-08-13

引用本文:

王春波1，2，丁文其1，2，刘书斌3，王军3，唐志成4. 各向异性渗透系数随应变场动态变化分析[J]. 岩石力学与工程学报, 2014, 33(sl): 3015-3021.
WANG Chunbo1，2，DING Wenqi1，2，LIU Shubin3，WANG Jun3，TANG Zhicheng4. ANALYSIS OF DYNAMIC CHANGES OF ANISOTROPIC PERMEABILITY COEFFICIENT WITH VOLUMETRIC STRAIN IN SEEPAGE COUPLING. , 2014, 33(sl): 3015-3021.

链接本文:

http://www.rockmech.org/CN/Y2014/V33/Isl/3015

[3]	李培超，李贤桂，龚士良. 承压含水层地下水开采流固耦合渗流数学模型[J]. 辽宁工程技术大学学报：自然科学版，2009，28(增1)：249-252.(LI Peichao，LI Xiangui，GONG Shiliang. Mathematical modeling of flow and land subsidence coupling for groundwater pumping in confined aquifer[J]. Journal of Liaoning Technical University：Natural Science，2009，28(Supp.l)：249-252.(in Chinese)) " target="_blank">
[4]	张永波，孙新忠. 基坑降水工程[M]. 北京：地震出版社，2000：30-50.(ZHANG Yongbo，SUN Xinzhong. Dewatering project of foundation pit[M]. Beijing：Seismological Press，2000：30-50.(in Chinese)) " target="_blank">
[8]	DAS B M. Principles of geotechnical engineering[M]. Boston：PWS Publishing，1998：20-45. " target="_blank">
[11]	付宏渊，吴胜军，王桂尧. 荷载作用引起砂土渗透性变化的试验研究[J]. 岩土力学，2009，30(12)：3 677-3 681.(FU Hongyuan，WU Shengjun，WANG Guiyao. Experiment study of influence of compressive stress on water permeability of sand soils[J]. Rock and Soil Mechanics，2009，30(12)：3 677-3 681.(in Chinese)) " target="_blank">
[14]	陈育民，徐鼎平. FLAC/FLAC3D基础与工程实例[M]. 北京：中国水利水电出版社，2009：112-125.(CHEN Yumin，XU Dingping. Fundamentals of FLAC/FLAC3D with engineering example[M]. Beijing：China Water Conservancy and Hydropower Press，2009：112-125.(in Chinese)) " target="_blank">
[2]	陈小平，白世伟. 软土蠕变-固结特性及计算模型研究[J]. 岩石力学与工程学报，2003，22(5)：728-734.(CHEN Xiaoping，BAI Shiwei. Research on creep-consolidation characteristic and calculation model of soft soil[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(5)：728-734.(in Chinese))
[5]	李云安，黄胜华，黄振伟. 抽汲地下水引起地面沉降的水-土耦合三维有限元数值模拟[J]. 地质科技情报，2005，24(增1)：249-252.(LI Yun′an，HUANG Shenghua，HUANG Zhenwei. Numerical simulation of land subsidence induced by groundwater withdrawal by three-dimensional finite element of water and soil coupling[J]. Geological Science and Technology Information，2005，24(Supp.1)：249-252.(in Chinese)) " target="_blank">
[6]	MERIS G，ROKHSAR A. Theory of consolidation for clays[J]. J. Journal of Geotechnical Engineering Division，1974，(8)：889-904. " target="_blank">
[7]	TAVENAS P，JEAN P，LEBLOND P，et al. The permeability of natural soft clays. part II：permeability characteristics[J]. Canadian Geotechnical Journal，1983，20(4)：645-659. " target="_blank">
[10]	RICHARDS L A. Capillary conduction of liquids through porous media[J]. Journal of Applied Physics，1931，1(5)：10-20. " target="_blank">
[12]	KLEINBERG R L，FLAUM C，GRIFFIN D D，et al. Deep sea NMR：methane hydrate growth habit in porous media and its relationship to hydraulic permeability，deposit accumulation，and submarine slope stability[J]. Journal of Geophysical Research，2003，108(B10)：2 508- 2 522. " target="_blank">
[1]	吴林高. 工程降水设计施工与基坑渗流理论[M]. 北京：人民交通出版社，2003：10-15.(WU Lingao. Engineering dewatering design and construction and foundation pit′s seepage theory[M]. Beijing：China Communications Press，2003：10-15.(in Chinese)) " target="_blank">
[9]	SINGH P N. Land subsidence，storage，hydraulic properties of an aquifer[Ph.D. Thesis][D]. Davis：University of California at Davis，2005. " target="_blank">
[13]	骆祖江，李会中，付延玲. 第四纪松散沉积层地下水渗流与地面沉降控制数值模拟[M]. 北京，科学出版社，2009：36-38.(LUO Zujiang，LI Huizhong，FU Yanling. The numerical simulation of groundwater seepage and ground settlement of Quaternary loose sediment layer[M]. Beijing：Science Press，2009：36-38.(in Chinese)) " target="_blank">