|Table of Contents|

Numerical Model of Loess Moistening Deformation(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2007年03期
Page:
43-46
Research Field:
Publishing date:
2007-09-20

Info

Title:
Numerical Model of Loess Moistening Deformation
Author(s):
LIANG Yan1;  ZHAO Gui-juan2;  XIE Yong-li1;  LI Tong-lu3
1. Key Laboratory of Highway Engineering in Special Region of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China; 2. School of Civil Engineering and Architecture, Xi'an University of Science and Technology, Xi'an 710054, Shaanxi, China; 3. School of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, Shaanxi, China
Keywords:
collapsible loess;  permeation;  moistening deformation;  coupling of permeation and deformation;  finite element model
PACS:
TU444
DOI:
-
Abstract:
Taking collapsible loess from Longxi region of Gansu Province as research object, the numerical model of loess moistening deformation was established, which considered the coupling of permeation and deformation. According to the conservation of mass and Darcy's law, the axis-symmetry permeation continuity equation was established, which fitted unsaturated soils and saturated soils, and the influence of deformation was considered. Constitutive model of loess collapse was established on the basis of the indoor consolidation tests. Because the permeation continuity equation and the basic equation of loess moistening deformation were all nonlinear, the numerical analysis method was adopted in solving equations. Space was parted by Galerkin method. Time field was parted by difference method. The finte element model(FEM)for the collapsible deformation of loess was gotten, and the solution of the FEM equation was presented. Results demonstrate that it is recommendable to consider the coupling of permeation and deformation in the research of loess moistening deformation, and the FEM model of loess moistening deformation is reasonable.

References:

[1] 焦彦利.黄土增湿的工程性状仿真分析[D].西安:长安大学,2004. JIAO Yan-li.The Numerical Calculation of Loess Moistening Deformation and the Application to the Construction Engineering[D]. Xi'an:Chang'an University,2004.
[2]张茂花,谢永利,刘保健.湿陷性黄土变形的各向异性及与浸水路径的无关性[J].中国公路学报,2006,19(4):11-16. ZHANG Mao-hua,XIE Yong-li,LIU Bao-jian.Anisotropy of Collapsible Loess Deformation and Independence of Deformation and Soak Paths[J].China Journal of Highway and Transport,2006,19(4):11-16.
[3]FREDLUND D G,RAHARDJO H.Soil Mechanics for Unsaturated Soils[M].New York:John Wiley & Sons Inc,1993.
[4]王铁行,李 宁,谢定义.非饱和黄土重力势、基质势、温度势探讨[J].岩土工程学报,2004,26(5):715-718. WANG Tie-hang,LI Ning,XIE Ding-yi.Gravitational Potential,Matrix Suction and Thermal Potential of Unsaturated Loess Soil[J].Chinese Journal of Geotechnical Engineering,2004,26(5):715-718.
[5]梁 燕,谢永利,刘保健,等.非饱和黄土渗透性的试验研究[J].水文地质工程地质,2006,33(2):27-30. LIANG Yan,XIE Yong-li,LIU Bao-jian,et al.The Test Study on the Permeability of Unsaturated Typical Loess[J].Hydrogeology & Engineering Geology,2006,33(2):27-30.
[6]谢永利.大变形固结理论及其有限单元法[M].北京:人民交通出版社,1998. XIE Yong-li.The Theory and Finite Element Method of the Large Deformation Consolidation[M].Beijing:China Communications Press,1998.
[7]蒋友谅.非线性有限元法[M].北京:北京工业学院出版社,1988. JIANG You-liang.The Nonlinear Finite Element Method[M].Beijing:Beijing Industry College Press,1988.

Memo

Memo:
-
Last Update: 2007-09-20