基于FLAC3D的龙江特大桥边坡稳定性分析  

Slope Stability Analysis of Longjiang River Large Bridge Based on 3-D Fast Lagrangian Method(FLAC3D)

作　　者：李洪勇 

机构地区：[1]国电物资集团有限公司,北京100034

出　　处：《武汉理工大学学报》2010年第3期61-64,共4页Journal of Wuhan University of Technology

摘　　要：将强度折减理论与三维快速拉格朗日分析(FLAC3D)法相结合,以静力平衡计算收敛为边坡失稳判据,分析了自然状态,强降雨状态,自然+地震作用和强降雨+地震作用下,不同评价区域的龙江特大桥边坡的整体稳定性安全系数Fs、破坏状态时的变形区及其对应的临界滑裂面。通过分析各状态下边坡整体位移等色图及沿主滑纵断面滑体不稳定区域速度矢量等色图,合理的评估了龙江特大桥右岸各评价区域边坡在4种工况下的稳定性状态,并给出了合理的防治滑坡的建议。The slope stability of Longjiang river bridge are analyzed with the three-dimensional fast lagrangian method and strength reduction theory.The calculation convergence is used as the instability criterion of slope and four different states,which are natural state,water-saturated state,natural state under seismic action and water-saturated stateunder seismic action,are considered during the analysis.The stability safety factor of each slope under different situations is obtained.Meanwhile,deformation areas and critical slip surface are got at the critical state.Therefore,the slope stability conditions of Longjiang river bridge at different states are reasonably assessed and rational suggestions are given for landslide control.

关 键 词：快速拉格朗日法 强度折减 边坡稳定 龙江特大桥 

分 类 号：TU473[建筑科学—结构工程]