【作者】 田继雪； 魏迎奇； 蔡红； 宋建正； 曲伟；

【Author】 TIAN Ji-xue;Wei ying-qi;CAI Hong;SONG Jian-zheng;Qu Wei;Institute of Water Resources and Hydropower Research;OFFSHORE OIL ENGINEERING CO.LTD Engineering Company;

【机构】 中国水利水电科学研究院； 海洋石油工程股份有限公司；

【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高速发展,高填方工程的数量和规模越来越大,如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可超过100m,因此高填方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降雨两种极端条件,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边坡体的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。更多还原

【Abstract】 With the rapid development of construction on national infrastructure,such as electric power,water conservancy,airport,transport,the number and size of projects with high fill slope become more and more large.For example,more than 100 m high ash dam was constructed to increase the restore capacity of fly ashes considering the space limit.Hence safety of high fill slope was shed more and more attention by the society.Taken a high fly ash dam as the case,this paper take extreme rainfall as controlling factor to study the safety of this case.Two extreme rainfall characteristics was considered,they are short duration high intensity rainfall and long duration rainfall.With numerical simulation,hydraulic response of the slope to the two extreme rainfall characteristics was presented,and the distribution and evaluation of unsaturated zone is discussed.Based on the simulated hydraulic response,temporal and spatial variation of slope stability under extreme rainfall was illustrated.The conclusion of this study is meaningful to the design and reinforcement of similar projects.更多还原