岩土体力学参数空间分布下的滑坡稳定性数值计算方法  

NUMERICAL MODELING METHOD FOR SLOPE STABILITY UNDER VARIABLE DISTRIBUTION OF STRENGTH PARAMETERS

作　　者：吴韩[1,2] 简文星[1] 肖迪[1] 檀康[1] 

机构地区：[1]中国地质大学教育部长江三峡库区地质灾害研究中心,武汉430074 [2]中交第二公路勘察设计研究院有限公司,武汉430056

出　　处：《工程地质学报》2015年第1期135-139,共5页Journal of Engineering Geology

基　　金：国家自然科学基金项目(41272306)资助

摘　　要：滑坡岩土体强度参数具有空间变异性,采用统一强度参数进行数值建模计算不能很好地体现这一客观性质对结果的影响。本文提出一种考虑岩土体力学参数空间分布下的滑坡数值建模方法,通过对滑坡地形地貌和有限的勘察数据进行控制边界下的插值补充,形成参数分布云图,结合Visual Basic和FISH编程将差异分布的参数加载到数值网格模型中,使理论模型和实际更接近。算例分析结果表明该方法可行,能更准确显示出滑体变形破坏部位及特征,对后期变形监测和治理有指导意义。Strength parameters of slope rock and soil can have spatial variability.Unified strength parameters for numerical modelling of slope stability can't reflect the effect of this nature in the calculation results.A new method of numerical simulation for slope stability is proposed in this paper.It takes into account the spatial variable distribution of the strength parameters in the slope.Using the topography and survey data,the spatial variation of the strength parameters can be reformed into a cloud contour map.With the help of Visual Basic programming and FISH language,the contour data of strength parameters are added to the numerical simulation model.Simulation results show that the method is workable and is more accurate in indicating the deforming location and situation, with has a guiding significance on landslide deformation monitoring and treatment.

关 键 词：滑坡 稳定性 数值模拟 力学参数 空间分布 

分 类 号：P642[天文地球—工程地质学]