剪应变增量在堆积体边坡稳定性研究中的应用

SHEAR STRAIN INCREMENT APPLYING IN STABILITY STUDYING OF DEBRIS SLOPE

堆积体边坡是我国西南地区普遍可见的一类边坡,而此类边坡的失稳(特别是滑动失稳),一般沿剪应变最大的部位发生。利用快速拉各朗日程序(FLAC-3D),对澜沦江中游某堆积体边坡划分足够细化的单元,通过最大剪应变增量找出坡体内薄弱部位,即最容易失稳的部位,结合变形特征对其稳定性进行了评价;同时与“最危险滑弧”搜索的最危险滑动范围对比表明,二者具有较好的一致性。

Debris slopes are ubiquitous in Southwest China, and engineering practices have indicated that these slopes slide along the maximal shear strain zone. In this paper, taking a debris slope in the midstream of Lanchang River as a engineering example, the slope stability was studied by analyzing its maximal shear strain increment and displacement characteristics with the software FLAC-3D ( Fast Lagrangian Analysis of Continua in Threedimension). Comparison with the calculation results of 'are search' shows tha...