摘要
汶川地震灾区某边坡,因厂房建设需要,对其进行开挖改造。鉴于其稳定性对工厂正常运行有重要影响,本文在岩体质量分级和岩体结构模型概化的基础上,采用快速拉格朗日差分法FLAC3D模拟边坡开挖,分析了边坡在自然条件、暴雨条件以及地震条件下的应力场、位移场、剪应变增量及塑性区的分布和变化特征。研究结果表明:边坡开挖引起坡面局部应力集中,后缘易拉裂破坏;降雨时呈现部分区域安全储备较低;在地震作用下,边坡处于不稳定状态。
As a result of plant-building needs,a slope was dealt with excavating treatment in the region of Wenchuan earthquake.In consideration of its stability having influence on normal operation of the plant and on the basis of rock classification and generalization model of rock mass structure,Fast Lagrangian method FLAC3D simulation of slope excavation was used to analyze the stress field,displacement field,shear strain increment and the plastic zone distribution which could be under the natural conditions,heavy rain conditions,and seismic conditions.The results showed that：excavation caused local stress concentration,posterior border easy to fail in tension;part of the regione was in low security reserve under rain;the slope was unstable due to the earthquake.
出处
《地质灾害与环境保护》
2010年第2期32-36,共5页
Journal of Geological Hazards and Environment Preservation
基金
"十一五"国家科技支撑计划项目资助(2006BAJ05A02
2006BAJ27B05)
