A Hypoplasticity-Based Method for Estimating Thaw Consolidation of Frozen Sand

被引：3

作者：

Wang S. ^{[1
]}

Liu F. ^{[1
]}

机构：

[1] Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an, 710048, Shaanxi

来源：

Geotechnical and Geological Engineering | 2015年 / 33卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Effective stress; Frozen sand; Hypoplasticity; Thaw consolidation; Water retention curve;

D O I：

10.1007/s10706-015-9902-8

中图分类号：

学科分类号：

摘要：

Thaw consolidation of frozen ground is one of the main causes for settlement of foundations in cold regions engineering. This paper firstly derived an improved von Wolffersdorff hypoplastic model by incorporating an internal state variable S to represent the cohesive forces of frozen soils. Then the principle of effective stress was enhanced by introducing a new expression of the Bishop Factor based on the water retention curves of fine sand. As for the migration of water during thaw consolidation, a modified Richards’ equation was used for porous fluid flow in a saturated or partially saturated soil. Coupled with the heat transfer equation taking into account the ice-water phase change, a numerical method was proposed for analyzing the thermo-hydro-mechanical processes during thaw consolidation of frozen ground. It was numerically implemented in the FISH language on the FLAC platform and was verified by thaw consolidation tests on frozen fine sand samples in laboratory. Results indicate that the calculated results agree in general with test data. © 2015, Springer International Publishing Switzerland.

引用

页码：1307 / 1320

页数：13

共 39 条

[1]

Andersland O.B., Ladanyi B., An introduction to frozen ground engineering, (1994)

[2]

Bauer E., Calibration of a comprehensive hypoplastic model for granular materials, Soils Found, 36, 1, pp. 13-26, (1996)

[3]

Bauer E., Wu W., A hypoplastic constitutive model for cohesive powders, Powder Technol, 85, pp. 1-9, (1995)

[4]

Bishop A.W., The principle of effective stress, Teknisk Ukeblad, 106, pp. 859-863, (1959)

[5]

Bourbonnais J., Ladanyi B., The mechanical behavior of frozen sand down to cryogenic temperatures, Proceedings, 4th International Symposium on Ground Freezing, Sapporo, Japan, 1, pp. 235-244, (1985)

[6]

Chen X.B., Liu J.K., Liu H.X., Et al., Frost action of soil and foundation engineering, (2006)

[7]

Cornforth D., Prediction of drained strength of sands from relative density measurements, ASTM STP, 523, pp. 281-303, (1973)

[8]

Foriero A., Ladanyi B., FEM assessment of large-strain thaw consolidation, J Geotech Eng, 121, 2, pp. 126-138, (1995)

[9]

Gibson R.E., England G.L., Hussey M.J.L., The theory of one dimensional consolidation of saturated clays: I. Finite non-linear consolidation of thin homogeneous layers, Géotechnique, 17, 2, pp. 261-273, (1967)

[10]

Gudehus G., A comprehensive constitutive equation for granular materials, Soils Found, 36, 1, pp. 1-12, (1996)

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