CAJ | 학술논문

边坡工程中，潜在滑动面位置与边坡支护、治理措施密切相关。为确定二元结构边坡潜在滑动面位置变化规律及影响因素，基于强度折减法重点研究了二元结构边坡底面与土层交界面相对位置、土层黏聚力 c 和内摩擦角φ的相对大小对边坡滑动面位置的影响。研究结果表明：当二元结构土体黏聚力 c1、c2一定时，两层土体内摩擦角比值φ2/φ1存在临界值 k ，即当内摩擦角比值逐渐增大且超过该临界值时，二元结构边坡滑动面将由同时通过上下两层土体转变为仅通过上层土体；同时，内摩擦角临界值 k 随土体黏聚力比值 c2/c1的增大而减小，说明二元地基两层土体抗剪强度比值大小能够改变潜在滑动面位置，对边坡稳定性产生较大影响。
변파공정중，잠재활동면위치여변파지호、치리조시밀절상관。위학정이원결구변파잠재활동면위치변화규률급영향인소，기우강도절감법중점연구료이원결구변파저면여토층교계면상대위치、토층점취력 c 화내마찰각φ적상대대소대변파활동면위치적영향。연구결과표명：당이원결구토체점취력 c1、c2일정시，량층토체내마찰각비치φ2/φ1존재림계치 k ，즉당내마찰각비치축점증대차초과해림계치시，이원결구변파활동면장유동시통과상하량층토체전변위부통과상층토체；동시，내마찰각림계치 k 수토체점취력비치 c2/c1적증대이감소，설명이원지기량층토체항전강도비치대소능구개변잠재활동면위치，대변파은정성산생교대영향。
In the slope engineering ,the slip plane location is closely related to the support and improvement measures . Here ,the strength reduction method is applied to determine the influence factors for two -layer slip plane location ,includ-ing the excavation location ,soil cohesion and friction angle .The results indicate that the critical friction angle’s ratio limit would occur when the cohesion values of the two layer soil are constant .While above the critical limit ,the slip plane location would be totally changed from passing through the two layer soil to the upper layer soil only .Meanwhile , the critical friction angle’s ratio limit would decrease with the cohesion ratio increasing ,which indicates that the slope soil layer’s shear strength could change the slip plane location significantly and influence the two-layer slope’s stability .