边坡高填方路基下伏多层采空区稳定性数值模拟评价  

NUMERICAL SIMULATION FOR STABILITY EVALUATION OF HIGH BACKFILL EMBANKMENT ON SLOPE WITH GOAFS

作　　者：朱友群[1] 施斌[1] 王宝军[1] 朴春德[1] 邱钰 高磊[1] 

机构地区：[1]南京大学地球科学系地球环境计算工程研究所,江苏南京210093 [2]广东省路桥建设发展有限公司,广东广州510635

出　　处：《工程地质学报》2009年第3期394-400,共7页Journal of Engineering Geology

基　　金：国家自然科学基金资助项目(40572154)

摘　　要：运用快速拉格朗算法分析了多层采空区路基在未处理、注浆处理和注浆处理路基加筋拼接3种工况下路基采空区受力变形和稳定特征。分析结果表明高填方路基在自重荷载和车辆荷载下打破原有采空区平衡状态,注浆加固处理后采空区应力重分布出现新的平衡,但在填方交界区域出现一定的剪应变增量集中,采取加筋处理后剪应力增量下移,路基整体性和变形协调性显著提高。In this paper, the Fast Lagrangian Analysis of Continua in 3 Dimensions（FLAC^3D） is used to analyze the mechanism and stability of the filled embankment on slope with goals. Three cases are considered. They are （1） goafs with un - treatment （2） goals with grouting （3） the embankment with grouting plus reinforcing to the slope. The numerical results show that the self - loading of high backfill embankment and traffic live loading can destroy the mechanical equilibrium of the original goals. The jointing area between the filled and slope surfaces ap- pears shear strain increment concentration, whereas the stress of goafs reaches to a new equilibrium after grouting. The shear strain increment moves down after reinforcing. As a result, the embankment stability increase obviously.

关 键 词：采空区 高填方 FLAC3D 数值模拟 稳定性 

分 类 号：TU443[建筑科学—岩土工程]