渗流地层人工冻结壁交圈时间计算方法

doi:10.13722/j.cnki.jrme.2022.0545

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Abstract To solve the problem that there is no calculation method for the design of artificial freezing wall in seepage stratum in the relevant design codes，the coupled temperature field-seepage field calculation of seepage strata was realized by using COMSOL Multiphysics finite element software. The calculation results were verified by indoor tests. The development law of the temperature field with the change of seepage velocity，freezing pipe spacing and refrigerant temperature is studied by numerical calculation. The results show that when the groundwater seepage velocity is greater than the critical velocity，the freezing wall does not cross-loop and there is a good linear relationship between the critical velocity and the freezing temperature gradient. The calculation method of the critical velocity is proposed. Referring to consolidation theory，a dimensionless closure factor is proposed. The closure factor - seepage velocity curve under different freezing pipe spacing and refrigerant temperature conditions is well fitted by using the growth function curve. On this basis，the calculation method of artificial freezing closure time under seepage conditions is established. The research results can provide reference for the design and calculation of artificial freezing construction in seepage stratum.

Key words： numerical analysis freezing wall freezing pipe spacing refrigerant temperature critical velocity closure time

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	Articles by authors
	SUN Liqiang1
	SHANG Ance1
	LANG Ruiqing2
	MIAO Yu3

Cite this article:

SUN Liqiang1,SHANG Ance1,LANG Ruiqing2, et al. Calculation method of artificial freezing wall closure time in seepage stratum[J]. , 2023, 42(S1): 3663-3673.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0545 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/IS1/3663

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