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EXPERIMENTAL STUDIES AND NUMERICAL ANALYSIS ON SEEPAGE DEFORMATION OF SOFT INTERLAYER

机译：软衬层渗流变形的试验研究与数值分析

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摘要

Seepage deformation is one of the most important factors that cause hydraulic structures and foundation failure. A wide rang of tectonic soft interlayer often appears on a dam site due to the intercalated sliding, so large scale seepage experiments of undisturbed interlayer samples are carried out to find out the seepage deformation pattern and the degree of damage of the soft interlayer. Size limitation of instruments makes the interlayer samples used in the experiments either several centimeters thick or several decimeters thick. Due to the difference of permeability between two kinds of soft interlayer, the experiment show that the relationships between interlayer and surrounding rock will affect the seepage deformation pattern. Based on the experiment, numerical analysis method was adopted to simulate the hydraulic gradient distribution in soft interlayer as well as the surrounding rock. Finally, Some findings of experimental studies and numerical analysis on seepage deformation of soft interlayer have been concluded in this paper.
机译：渗流变形是引起水工结构和地基破坏的最重要因素之一。由于插层滑移作用，通常在坝址上出现大范围的构造软夹层，因此，对未扰动的夹层样品进行了大规模的渗流实验，以找出渗流变形模式和软夹层的破坏程度。仪器的尺寸限制使实验中使用的夹层样品厚几厘米或几分米。由于两种软质夹层之间渗透率的差异，实验表明夹层与围岩之间的关系会影响渗流变形模式。在试验的基础上，采用数值分析方法对软夹层及围岩的水力梯度分布进行了模拟。最后，总结了软夹层渗流变形的实验研究结果和数值分析。

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