马三峰土质边坡稳定性分析与评价

Analysis and Evaluation on Stability of Masanfeng Soil Slope

基于马三峰边坡南段土质边坡的工程地质特征现场勘查,分别运用极限平衡法和快速拉格朗日法分析了马三峰土坡的稳定性,搜索出了潜在的滑动面并计算出相应的安全系数,结果认为土坡整体是不稳定的。通过2种计算结果的对比研究,对此土坡的破坏模式及其发展趋势做出评价,认为此土质边坡破坏的力学特征为牵引式滑坡,失稳不是一次性地全部滑塌,而是分阶段滑动,破坏模式为一系列动态的平面—圆弧滑面破坏。如不及时治理,该滑坡体将会继续向后缘发展。

Through a systematical field investigegation of engeering geology on the south part of Masanfeng soil slope, using the method of limit equilibrium and FLAC,the stabiliy of this soil slope is analysed. The potential slip surface is founded, and the safety factor is calculated. The results indicated that the soil slope is unstable. By comparision the results of the two calculations, the failure mode and the developmental trend of the soil slope are analysed. The mechanical characteristics of this slope is the traction slope slide. The slope collapsed through various stages instead of one-time-collapse. The failure mode of the slope is a series of dynamic planar-circular slide. The failure will reached the back edge of the slope if the treatment isn＇t done in time.