2011, Volume 13, Issue 11
Strategic Study of CAE >> 2011, Volume 13, Issue 11
Deformation law of frozen wall through deep surface soil
China Coal 5th Construction Company, Handan, Hebei 065003, China
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Abstract
This paper studies the deformation law of frozen wall with different ground pressures, frozen wall thicknesses, average temperatures, excavation heights and the relationship among all influencing factors based on the mathematical model established by ANSYS software. According to the results, sidewall displacement decreases with average temperature of frozen wall lowering and frozen wall thickness increasing, and increases with excavation height and ground pressure increasing. Furthermore, the influence of ground pressure change is extraordinarily remarkable. The author puts forward that frozen wall through thick overburden should be designed according to the condition of deformation, and excavation height should be strictly controlled during construction as it is an extremely important parameter for stability of frozen wall as well as a major technical index of frozen wall safety. Compared with increasing the thickness of frozen wall, lowering average temperature is more effective and energy-saving to promote stability of frozen wall when frozen wall is about 10 m thick and average temperature is －20 ℃. The deformation law concluded in this study has important reference value for design, and safe, effective and power-saving construction of freezing projects through thick overburden.
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