摘要
某水库工程沥青心墙坝坝基存在砂卵砾石层渗透性强、河床断层、左岸绕坝渗流等防渗设计难题,为减少渗漏和保障工程运行安全,该工程坝体采用沥青混凝土心墙进行防渗,坝基及左岸古河槽采用固结灌浆及帷幕灌浆的方式进行防渗处理。针对坝体和坝基系统的防渗设计,通过三维渗流分析,确定了不同运行工况下水库的渗透流量,研究了坝体和坝基系统及周围山体的渗流场分布,结合渗透破坏试验确定允许水力坡降,对大坝防渗体系的有效性和防渗设计合理性进行了评估。结果表明,该工程防渗体系能有效防止水库发生明显渗漏,坝体下游渗流出逸点和坝基覆盖层不会发生渗透破坏。
In order to reduce the seepage and ensure the seepage safety ofa project,the asphalt concrete core wall was used for seepage con⁃trol of the dam body and the consolidation grouting and curtain grouting were used for seepage control of the dam foundation and the left bank ancient channel.Aiming at the anti⁃seepage design of dam body and dam foundation system,through three⁃dimensional seepage analysis,the seepage flow of a reservoir under different operation conditions was determined.The seepage field distribution of dam body and dam founda⁃tion system and surrounding mountains was studied.Combined with the allowable hydraulic gradient determined by seepage failure test,the effectiveness of dam anti⁃seepage system and the rationality of anti⁃seepage design were evaluated.The results show that the seepage control system of the project can effectively prevent the obvious leakage of the reservoir and the seepage damage will not occur at the downstream exit point of the dam body and the overburden layer of the dam foundation.The research results can provide a reference for the seepage control de⁃sign of similar projects.
作者
柳莹
吴俊杰
马军
杨玉生
LIU Ying;WU Junjie;MA Jun;YANG Yusheng(Xinjiang Water Resources and Hydropower Planning and Design Administration,Urumqi 830000,China;Xinjiang Institute of Water Resources and Hydropower,Xinjiang 830000,China;China Institute of Water Resources and Hydropower,Beijing 100048,China)
出处
《人民黄河》
CAS
北大核心
2021年第7期137-140,共4页
Yellow River
基金
国家重点研发计划项目(2017YFC0404905)
新疆维吾尔自治区天山英才工程第二期项目(2016-2018)。
关键词
砂砾石覆盖层
沥青混凝土
心墙坝
三维绕坝渗流计算
安全评价
gravel overburden
asphalt concrete
core wall dam
three dimensional seepage calculation around dam
safety evaluation
