摘要
针对边坡上存在的花岗岩孤石极易形成落石而产生较大危害问题,以深圳市洲石路K1+880左侧边坡塌方的实际工程为案例,就花岗岩孤石对边坡稳定性的影响进行研究。根据现场获得的图片进行数字图像处理得到孤石的数字化模型;利用MATLAB建立边坡模型,并采用DISTMESH2D对模型进行网格划分;基于FLAC^3D对边坡进行稳定性分析。研究结果表明:均质土体边坡最危险潜在滑动面为规则类圆弧滑动带,而孤石存在时最危险潜在滑动面沿着孤石边缘扩展,呈现绕石效应;且孤石完全埋入边坡和孤石部分露出边坡对边坡的破坏模式和安全系数会产生不同影响。
In view of the problem that slopes are very easy to form falling rocks and cause great harm when there are granite rock. This paper studied the actual project of the slope collapse on the left side of K1+880 of ZhouShi road in Shenzhen city as an example to study the influence of granite rocks on the slope stability. The digital model of the granite rock was obtained by digital image processing based on the images obtained in the field, and the slope model was established by MATLAB. The model was meshed by DISTMESH2 D.The stability of slopes were analyzed based on FLAC^3D. The results show that the failure surface of homogeneous soil slope is a regular sliding zone, and the sliding surface will expand along the edge of the rock when there is granite rock, showing the effect of rock-around. The failure mode and safety factor of the slope will be different when the granite rocks are completely buried in the slope and partly exposed in the slope.
作者
刘晓华
韦彬
唐皓
戴智颖
LIU Xiaohua;WEI Bin;TANG Hao;DAI Zhiying(Shenzhen Transportation Design&Research Institute,Shenzhen 518003,China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2019年第12期2977-2983,共7页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(51878668)
贵州省交通运输厅科技项目(2017123033)
