极端降雨条件下高填方工程的稳定性研究

发布时间：2018-03-09 00:26

本文选题：高填方　切入点：极端降雨　出处：《水利学报》2014年S2期 　论文类型：期刊论文

【摘要】：随着我国电力、水利、机场和交通等重大基础工程建设速度的快速发展,高填方工程的数量和规模越来越大,如在贮灰场工程建设中,由于场地限制需通过子坝加高来提高粉煤灰贮放量的灰坝高边坡工程其最大高度已超过100 m,因此高填方边坡工程的安全问题成为备受各方关注的重大社会问题。本文以某灰坝高填方工程为依托,以高填方边坡安全的制约性因素-极端降雨为控制条件,考虑短历时强降雨和长历时弱降雨两种极端工况,通过数值计算手段,系统研究了两种极端降雨条件下边坡土体的非饱和演变特征和发展变化规律,探讨了相应条件下边坡土体内的非饱和区分布范围和发展过程。在此基础上,分析计算了随极端降雨过程发展的边坡体抗滑稳定安全系数的时空渐变规律,探讨了边坡体的抗滑稳定性发展演化过程,其结论对类似工程的设计和加固治理具有借鉴意义。
[Abstract]:With the rapid development of electric power, water conservancy, airport and traffic in China, the number and scale of high-fill projects are becoming larger and larger, such as in the construction of ash storage yard. Due to the site limitation, the maximum height of the ash dam slope which needs to be raised by the sub-dam to increase the amount of fly ash storage has exceeded 100 m, so the safety of the high fill slope project has become a major social problem that has attracted much attention. This paper is based on a high fill project of a grey dam. Taking the limiting factor of high fill slope safety-extreme rainfall as the control condition, and considering two extreme conditions of short duration, strong rainfall and long duration of weak rainfall, the numerical calculation method is adopted. The characteristics of unsaturated evolution and development of slope soil under two extreme rainfall conditions are systematically studied, and the distribution and development process of unsaturated zone in slope soil under corresponding conditions are discussed. This paper analyzes and calculates the temporal and spatial variation law of slope stability safety coefficient with the development of extreme rainfall, and discusses the evolution process of slope anti-slide stability. The conclusion can be used for reference in the design and reinforcement of similar projects.
【作者单位】：中国水利水电科学研究院岩土工程研究所;海洋石油工程股份有限公司;
【基金】：国家973项目(2014CBO47004)
【分类号】：TU43

【参考文献】