考虑非饱和渗流过程的岩体变形规律分析

doi:10.13722/j.cnki.jrme.2018.0652

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摘要

蓄水初期谷幅变形异常是我国特高拱坝面临的新问题，考虑岩体从非饱渗流和到饱和渗流转变过程中的变形机制亟待研究。基于岩体从非饱和渗流到饱和渗流的过渡过程，推导岩体在非饱和渗流–应力耦合作用下的控制方程，建立非饱和岩体水力耦合模型，并应用于圆柱试件和边坡入渗过程的变形分析。结果表明：岩体从非饱渗流和到饱和渗流转变过程中，饱和度的改变是引起岩体变形的重要因素之一。研究成果对揭示特高拱坝蓄水初期坝体及山体异常变形机制具有重要的指导意义。

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	任青文1
	张林飞2
	沈雷2
	陶梅1

关键词 ：岩石力学, 非饱和渗流, 孔隙水压, 渗流应力耦合, 岩体变形

Abstract：

Abnormal deformation of valley in the initial impoundment period is a new problem of super high arch dam in China. It is urgent to study the deformation mechanism of rock mass from unsaturated seepage to saturated seepage. Based on the transition process of rock mass from unsaturated seepage to saturated seepage，the governing equations of rock mass under the interaction of unsaturated seepage and stress are derived. The hydraulic coupling model of unsaturated rock mass is established，and it is applied to the deformation analysis of cylindrical specimen and slope infiltration process. The results show that the change of saturation is one of the important factors causing the deformation of rock mass during the transition from unsaturated seepage to saturated seepage. The research results have important guiding significance for revealing the abnormal deformation mechanism of the dam and the mountain in the early stage of the storage of the super high arch dam.

Key words： rock mechanics unsaturated seepage pore water pressure hydro-mechanical coupling rock deformation

引用本文:

任青文1，张林飞2，沈雷2，陶梅1. 考虑非饱和渗流过程的岩体变形规律分析[J]. 岩石力学与工程学报, 2018, 37(S2): 4100-4107.
REN Qingwen1，ZHANG Linfei2，SHEN Lei2，TAO Mei1. Analysis of deformation law of rock mass considering unsaturated seepage process. , 2018, 37(S2): 4100-4107.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2018.0652 或 https://rockmech.whrsm.ac.cn/CN/Y2018/V37/IS2/4100

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