【作者】 朱俊杰； 张智超； 洪宝宁； 胡晓娟；

【Author】 ZHU Junjie;ZHANG Zhichao;HONG Baoning;HU Xiaojuan;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University;Jiangsu Research Center for Geotechnical Engineering Technology,Hohai University;Key Laboratory of Geohazard Prevention of Hilly Mountains,Ministry of Land and Resources of China;

【机构】 河海大学岩土力学与堤坝工程教育部重点实验室； 江苏省岩土工程技术工程研究中心； 国土资源部丘陵山地地质灾害防治重点实验室；

【摘要】 针对日益增长的山区公路建设需求,利用有限元法,通过自然边坡状况、回填土强度和填筑高度这3个设计参数的敏感性分析,对修筑于不同开挖角下加筋路基的应力变形特性进行了对比研究。结果表明:与修筑在水平场地上的路基相比,回填土强度的降低或填筑高度的增加都会更加显著地增大陡坡路基的变形,同时,由于其回填土容易沿着边坡产生整体下滑,导致了其变形、基底压力和面板侧移等过大的问题。在不同坡面摩擦系数、回填土强度和填筑高度下,开挖角为45°的加筋陡坡路基的位移比开挖角为63.4°(坡比2:1)和90°(水平场地)的路基的变形分别高6.8%~96.8%和29.4%~192.3%、6.8%~33.1%和29.4%~77.9%、7.7%~37.9%和27.2%~91.6%。研究结论可为日益增长的山区公路建设提供指导。更多还原

【Abstract】 Aiming at the demand of increasing mountain roadway construction,the stress and deformation behavior of reinforced embankment on steep slope with different angles was studied comparatively by finite element method based on the parametric analysis of backslope friction angle,backfill strength and filling height.The results indicate that compared to the conventional embankment constructed on level ground,the decrease of backfill strength and raise of filling height will increase the deformation of reinforced embankment on steep slope more severely,and the reinforced embankment on steep slope may have disadvantages in the control of deformation,base pressure and wall deflection etc.,which is due to the sliding of backfill along the slope.Based on different backslope friction angles,backfill strength and heights,respectively,the deformation of reinforced embankment on 45°slope is 6.8%~96.8%and 29.4%~192.3%,6.8%~33.l%and 29.4%~77.9%,7.7%~37.9%and 27.2%~91.6%larger than those of the embankment on 63.4°(slope ratio = 211) slope and embankment on 90"slope(level ground),respectively.The results can provide guidance for the increasing road construction in mountainous areas.更多还原