线性加荷情况下非饱和土层一维固结特性分析

doi:10.3969/j.issn.1007-2861.2015.01.002

Abstract

Abstract:

Semi-analytical solutions of excess pore-air pressure, excess pore-water pressure and degree of consolidation are obtained based on the Fredlund’s one-dimensional consolidation theory for unsaturated soil. The research object is a layer of unsaturated soil whose top surface is penetrable, and the bottom surface impenetrable to water and air. With a typical example, rules of excess pore-air pressure, excess pore-water pressure and degree of consolidation changing with time in different soil depth and ratio of permeability coefficient of air and water are analyzed. The linear elastic and viscoelastic situations are calculated, analyzed and compared. The conclusions are useful in the research of unsaturated soil consolidation characteristics and practical engineering problems about consolidation under line loads.

Key words: line load, one-dimensional consolidation , semi-analytical solution , unsaturated soil

QIN Aifang, GE Hang. Analysis of one-dimensional consolidation characteristics in unsaturated soil under line loads[J]. Journal of Shanghai University（Natural Science Edition）, 2016, 22(5): 624-636.

References

[1] Therzaghi K. Erdbaumechanik auf bodenphysikalischen Grundlagen [M]. Wien: Deuticke, 1925.
[2] Biot M A. General theory of three-dimensional consolidation [J]. Journal of Applied Physics, 1941, 12(2): 155-164.
[3] Fredlund D G, Hasan J U. One-dimensional consolidation theory: unsaturated soils [J]. Canadian Geotechnical Journal, 1979, 16(3): 521-531.
[4] Barden L. Consolidation of compacted and unsaturated clays [J]. Geotechnique, 1965, 15(3): 267-286.

[5] Chen Z H, Xie D Y, Liu Z D. Consolidation theory of unsaturated soil based on the theory of mixture (Ⅰ) [J]. Applied Mathematics and Mechanics (English Edition), 1993, 14(2): 137-150.
[6] Chen Z H. Consolidation theory of unsaturated soil based on the theory of mixture (Ⅱ) [J]. Applied Mathematics and Mechanics (English Edition), 1993, 14(8): 687-698.
[7] 杨代泉, 沈珠江. 非饱和土一维固结简化计算[J]. 岩土工程学报, 1991, 13(5): 70-78.
[8] Qin A F, Chen G J, Tan Y W, et al. Analytical solution to one-dimensional consolidation in unsaturated soils [J]. Applied Mathematics and Mechanics (English Edition), 2008, 29(10): 1329-1340.
[9] Qin A F, Sun D A, Tan Y W. Semi-analytical solution to one-dimensional consolidation in unsaturated soils [J]. Applied Mathematics and Mechanics (English Edition), 2010, 31(2): 215-226.
[10] 秦爱芳, 罗坤, 孙德安. 非饱和土粘弹性地基一维固结特性分析[J]. 上海大学学报(自然科学版), 2010, 16(2): 203-209.
[11] 谢康和, 潘秋元. 变荷载下任意层地基一维固结理论[J]. 岩土工程学报, 1995, 17(5): 80-85.
[12] 谢康和, 郑辉, Leo C J. 变荷载下饱和软黏土一维大应变固结解析理论[J]. 水利学报, 2003, 34(10): 6-13.
[13] 李传勋, 胡安峰, 谢康和, 等. 变荷载下考虑非达西渗流的一维固结半解析解[J]. 岩石力学与工程学报, 2011, 30(S2): 3937-3943.
[14] 李传勋, 谢康和, 卢萌盟, 等. 变荷载下基于指数形式渗流的一维固结分析[J]. 岩土力学, 2011, 32(2): 553-559.
[15] 李传勋, 谢康和, 卢萌盟, 等. 变荷载下基于指数渗流双层地基一维固结分析[J]. 岩土力学, 2012, 33(5): 1565-1571.
[16] Crump K S. Numerical inversion of Laplace transforms using a Fourier series approximation [J]. Journal of the ACM, 1976, 23(1): 89-96.
[17] Gibson R E, Schiffman R L, Cargill K W. The theory of one-dimensional consolidation of saturated clays. Ⅱ. Finite nonlinear consolidation of thick homogeneous layers [J]. Canadian Geotechnical Journal, 1981, 18(2): 280-293.

Analysis of one-dimensional consolidation characteristics in unsaturated soil under line loads

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