Influences of strain softening and seepage on elastic and plastic solutions of circular openings in nonlinear rock masses

来源期刊：中南大学学报(英文版)2010年第3期

论文作者：杨小礼 黄阜

文章页码：621 - 627

Key words：strain softening; seepage; nonlinear yield; ground reaction curve; rock masses

Abstract: Considering the influence of strain softening, the solutions of stress, displacement, plastic softening region radius and plastic residual region radius were derived for circular openings in nonlinear rock masses subjected to seepage. The radial stress distribution curve, ground reaction curve, and relation curve between plastic softening region radius and supporting force in three different conditions were drawn respectively. From the comparisons among these results for different conditions, it is found that when the supporting force is the same, the displacement of tunnel wall considering both seepage and strain softening is 85.71% greater than that only considering seepage. The increase values of radial displacement at 0.95 m and plastic softening region radius at 6.6 m show that the seepage and strain softening have the most unfavorable effects on circular opening stability in strain softening rock masses.

基金信息：Hunan Provincial Science Foundation of China
the Foundation for the Author of National Excellent Doctoral Dissertation of China