流固耦合作用下节理岩质边坡失稳过程的RFPA模拟分析  

RFPA simulation and analysis on rock slope subjected to coupled mechanical and seepage flow

作　　者：韩光[1] 李连崇[2] 王大国[3] 

机构地区：[1]辽宁工程技术大学安全学院,辽宁阜新123000 [2]大连理工大学土木水利学院,辽宁大连116024 [3]大连大学材料破坏力学数值实验研究中心,辽宁大连116024

出　　处：《辽宁科技大学学报》2008年第2期115-121,共7页Journal of University of Science and Technology Liaoning

基　　金：国家自然科学基金重点项目(40638040);国家自然科学基金项目(10672028)

摘　　要：利用基于强度折减法的RFPA-Slope对渗流与应力耦合作用下的软弱互层岩质边坡稳定性进行了数值模拟分析,数值模拟不但直观形象地给出了边坡的渗流场、应力场、破坏区分布,而且得到了边坡滑移破坏面的萌生、扩展、贯通以及坡体整体失稳的渐进破坏过程,同时求得安全系数。并与无地下水的稳定性作了比较,结果表明,地下水渗流的作用使坡体位移增大,边坡安全系数减小,明显加大了滑坡范围。对实例的分析说明,RFPA-Slope能够较为准确地预测边坡潜在破坏面的形状与位置及计算相应的稳定安全系数,本文方法对于边坡,特别是对于复杂边坡的稳定性分析具有实用性。The stability analysis on rock slope was conducted by using the RFPA-Slope incorporated with strength reduction theory. Not only were the seepage flow field, stress field and failure zone of slope obtained in the simulation, but also the initiation and growth of the slide surface and macro failure in the slope as well as the safety factor were achieved directly. The numerical results were compared with those outputs obtained in the case without seepage flow, which showed that the displacement of slope increased and safety factor diminished evidently when the seepage flow was considered. And the failure zone expanded due to the influence of seepage flow. The case study indicates that RFPA-Slope can rather rationally predict both safety factor of slope and the corresponding shape and position of the potential slip surface. Accordingly, practical applicability of the proposed technique to complicated cases is verified.

关 键 词：渗流 岩质边坡 稳定性分析 RFPA 

分 类 号：TP325.1[自动化与计算机技术—计算机系统结构]