摘要
西南山区工程建设过程中顺层岩质边坡较为常见。以贵州某高速公路特大桥拱座基坑边坡为例,结合现场调查以及钻孔岩芯资料,在分析区域地质环境、降雨等条件的基础上,对该顺层边坡变形原因与破坏模式进行分析,并用有限元数值计算法对两种防护方案进行全面、科学的对比分析,并给出防护方案建议。结果表明:该当边坡岩体结构为硬质岩夹多层泥质薄膜和软质岩的陡倾顺层边坡,其工程地质条件较差,在降雨和工程活动的诱发作用下,边坡易发生蠕滑-拉裂型变形破坏。
Bedding rock slope is common in the process of project construction in southwest mountainous area. In guizhou super-large bridge abutment slope of an expressway as an example, combined with the field survey and drilling core data, based on the analysis of regional geological environments, such as rainfall conditions, on the basis of the cause of bedding slope deformation and failure mode analysis, by using finite element numerical calculation method for two kinds of protection plan to conduct a comprehensive and scientific analysis, and protection scheme is given advice. The results show that the rock mass structure of the slope is a steep incline bedding slope with multi-layer muddy film and soft rock, and its engineering geological conditions are poor. Under the action of rainfall and engineering activities, the slope is prone to creep slip-pull fracture deformation and failure.
作者
杨瑞娟
苏晓亮
Yang Ruijuan;Su Xiaoliang(Guizhou Transportation Planning Survey&Design Academe Co.,Ltd.,Guiyang 550081,China)
出处
《科学技术创新》
2022年第34期193-196,共4页
Scientific and Technological Innovation
关键词
边坡防护
顺层边坡
蠕滑-拉裂型
数值计算
slope protection
edding slope
creep slip-tensile crack type
numerical calculation
