考虑坡面稳定的黄土高切坡设计研究  

Design on high cutting loess slope considering slope surface stability

作　　者：宋飞[1] 李亚兰[1] 陈志新[1] 

机构地区：[1]长安大学地质工程与测绘学院,西安710054

出　　处：《水文地质工程地质》2008年第2期45-48,共4页Hydrogeology & Engineering Geology

基　　金：交通部西部交通建设科技攻关项目(200131881213)

摘　　要：通过泥沙运动力学分析了在坡面流作用下土颗粒的受力情况,建立了临界坡度的计算公式。在此基础上,综合考虑坡角的优化设计、单级坡高的确定及平台的约束三个方面研究了黄土高切坡的设计。通过工程实例分析表明,考虑坡面稳定的黄土高切坡设计方法是合理的。因此,建议边坡开挖时开挖坡角以及开挖形式既要满足坡体稳定性的要求也要满足坡面稳定的要求。By means of mechanics of sediment transport, forces acting on soil grain are analyzed under the slope surface flow and calculation formula of critical gradient is set up. Based on the critical gradient, the design of high cutting loess slope is studied considering the optimizing of slope grade, the determining of slope height and the constraining of platform. The analysis results of engineering example show that the design method of high cutting loess slope considering slope surface stability is rational. Thus, it is proposed that the excavation grade and shape of slope are not only satisfied with slope stability but also satisfied with slope surface stability when slope is excavated.

关 键 词：坡面 临界坡度 高切坡 稳定 

分 类 号：P642.116[天文地球—工程地质学]