西北水电Issue(2)：66-71,6.DOI:10.3969/j.issn.1006-2610.2024.02.011
百米级均质土坝坝体排水型式研究
Study on Drainage Patterns of 100-meter-level Homogeneous Earth Dams
摘要
Abstract
Dam drainage design is one of the important tasks in earth-rock dam engineering design.Reasonable arrangement of the dam drainage pattern,drainage elevation and range can effectively reduce the dam infiltration line,control dam seepage,increase the stability of the downstream dam slope,and prevent seepage failure.At present,there is still a lack of successful engineering experience in the drainage design of homogeneous earth dams with dam heights exceeding 70 m in China.In order to solve the problems of unreasonable drainage pattern design in the dam and defects in the drainage scheme design,relying on a project under construction,different drainage pattern combinations are drawn up at different elevations and locations in the homogeneous earth dam body,and the drainage is studied through numerical simulation analysis.The impact of the drainage system on the infiltration line of the dam body and the stability of the dam slope is analyzed,and the optimal drainage pattern(vertical drainage+horizontal drainage+prism drainage)suitable for 100-meter-level homogeneous earth dams is proposed.The results show that for a 100-meter-level homogeneous earth dam with a high normal wa-ter level downstream of the dam,vertical drainage+horizontal drainage+prism drainage can be the best drainage pattern,and the verti-cal drainage structure is set in the middle and lower reaches of the dam body and is tilted upstream.Considering the construction quality,the slope of the upstream tilt should be 1∶0.5.However,for this type of combined drainage,the applicable scope of the dam seepage anisotropy kx/kz needs to be calculated and analyzed based on specific projects.The study results can provide reference for the drainage design of 100-meter-level homogeneous earth dams.关键词
百米级均质土坝/排水型式/竖向排水Key words
100-meter-level homogeneous earth dam/drainage pattern/vertical drainage分类
建筑与水利引用本文复制引用
汪李艳,王静,赵海亮,吕琦,杜娟娟..百米级均质土坝坝体排水型式研究[J].西北水电,2024,(2):66-71,6.基金项目
陕西省重点研发计划(S2024-YF-YBGY-1815). （S2024-YF-YBGY-1815）
