Evaluating changes in the degree of saturation in excavation disturbed zones using a stochastic differential equation
Evaluating changes in the degree of saturation in excavation disturbed zones using a stochastic differential equation
复制标题
使用随机微分方程评估开挖扰动区域的饱和度变化
DOI:
10.1016/j.compgeo.2021.104598
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发表时间:
2022
影响因子:
5.3
通讯作者:
Kameya Hiroshi
中科院分区:
文献类型:
--
作者:
Togashi Yota;Mizuo Kazuki;Osada Masahiko;Yamabe Tadashi;Kameya Hiroshi
Deformation characteristics of sedimentary rocks significantly change with water content during the drying process. Therefore, the proper evaluation of such drying deformation phenomena is necessary for tunnel construction in which extremely small displacements are allowed, such as geological disposal. Furthermore, it is also essential to accurately assess water content changes in the rock masses. The excavation disturbed zone (EDZ) spreads around the tunnel owing to the excavation process. The EDZ has a higher hydraulic conductivity than an intact rock mass. Therefore, it is essential to predict water content changes in the EDZ within the scope of the drying deformation phenomena. In this study, we derived the exact solution to the Richards’ equation at the Neumann boundary, which can describe the drying phenomena in sedimentary rocks. Using Japanese tuff, we conducted permeability test and mercury intrusion porosimetry tests to obtain the water diffusion coefficient and verify whether its drying behavior can be described using the exact solution. Using the verified exact solution, we propose a new stochastic differential equation that could be used to explain the local decrease in water content and the increase in variations in the EDZ, and we applied this stochastic differential equation to the 2D tunnel problem.
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DOI:
10.5575/geosoc.104.346
发表时间:
1998
期刊:
Journal of the Geological Society of Japan
影响因子:
--
作者:
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通讯作者:
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DOI:
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发表时间:
2021
影响因子:
7.2
作者:
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通讯作者:
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1996
期刊:
MRS Proceedings
影响因子:
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发表时间:
1997
影响因子:
7.2
作者:
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通讯作者:
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影响因子:
3.7
作者:
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通讯作者:
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