越江地铁荷载作用下软黏土孔压试验研究

doi:10.13722/j.cnki.jrme.2019.0976

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Abstract Many cross-river subways are often constructed in deep soft soil layers，and the frequent changes of the warp soil above and the water level is a disadvantage to the control of the post-construction settlement. Therefore，the safety of cross-river subway is a challenge to control the post-construction settlement. Therefore，the safety of cross-river subway is undermined when it starts running. In this paper，the bidirectional dynamic triaxial test was operated by trial and error to stimulate the loading of cross-river subway on soft clay sample. The changing curve of pore pressure through dynamic test could be plotted，and a pore pressure model of soft clay under cross-river subway loading can be built. The study shows that：Under cross-river subway loading，the growing of pore pressure is firstly rapid，then slows down and stable. Increasing the effective confining pressure during cyclic loading make the pore water pressure rise，the stability value of pore water pressure will increase with the increase of radial cyclic stress ratio. The quadratic logarithmic model can be used to simulate the pore pressure development of soft clay under cyclic loading. The model takes the effects of radial cyclic stress ratio and effective confining pressure into consideration，which can provide as a reference for post-construction settlement prediction of cross-river subway.

Key words： soil mechanics cross-river subway cyclic loading pore pressure effective confining pressure radial cyclic stress ratio

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	Articles by authors
	DING Zhi1
	ZHUANG Jiahuang2
	WEI Xinjiang1
	KONG Bowen3
	MA Shaojun4

Cite this article:

DING Zhi1,ZHUANG Jiahuang2,WEI Xinjiang1, et al. Experimental study of pore pressure model of soft clay under cross-river subway loading[J]. , 2020, 39(S1): 3178-3187.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2019.0976 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/IS1/3178

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