泡沫改良粗粒渣土渗透性计算模型及适用性对比研究

doi:10.13722/j.cnki.jrme.2020.1141

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Abstract In the process of shield tunnelling，once the permeability of conditioned soils is too high，it is easy to cause water spewing. Therefore，it is very important to predict the permeability of foam-conditioned soils. In this paper，a theoretical calculation model of the permeability coefficient of foam-conditioned soils was proposed based on the modified equivalent gradation method. Combined with the results of large permeability tests，the prediction accuracy and application range of the developed method were compared with the effective permeation channel method. The results show that the predicted permeability coefficients of the two methods are distributed in the same magnitude with the measured values. The predicted values by the effective permeation channel method are closer to the measured values，and the predicted values by the modified equivalent gradation method are larger than the measured values. On the whole，the predicted values by the modified equivalent gradation method maintain the same growth and reduce trend with the measured values，even for coarse-grained soils. Due to that the modified equivalent gradation method does not consider the conditioning states of foam-conditioned soils，it is applicable to a wider range of soil particle size and easy to be popularized in practical engineering applications.

Key words： soil mechanics earth pressure balance shield foam-conditioned soil permeability coefficient calculation model applicability

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	Articles by authors
	WANG Shuying1
	LING Fanlin1
	HUANG Shuo2

Cite this article:

WANG Shuying1,LING Fanlin1,HUANG Shuo2. A permeability calculation model of foam-conditioned coarse-grained soil and its applicability[J]. , 2021, 40(11): 2357-2365.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.1141 OR https://rockmech.whrsm.ac.cn/EN/Y2021/V40/I11/2357

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