摘要
积石峡水电站面板堆石坝主堆石区采用坝址区岩石开挖料填筑而成,为控制坝体的湿化变形,在坝体填筑基本完成后,采用坝体底部浸水的措施。结果表明:坝体浸水能提前释放堆石坝的湿化变形,特别适用于风化岩、软岩等软化系数小的岩石填筑的坝体;坝体浸水加速了面板堆石坝的施工期变形,缩短了大坝施工期沉降时间,为混凝土面板的提前施工及其裂缝控制创造了良好的先决条件;坝体排水期间,坝体内外水位差应不超过1 m。
In the concrete faced rock-fill dam of Jishixia Hydraulic Power Station,the major material zone was filled by excavation of stones in dam area. In order to control rock-fill material’s wetting deformation,the dam bottom took immersion measures after the completion of dam filling. The monitoring results show that the dam immersion can release the wetting deformation in advance and is especially suitable for the dam body filled with the rock of smaller softening coefficient such as soft rock and weathered rock,that dam immersion can create a prerequisite condition of completion in advance and crack control from accelerating the deformation and shortening settlement time of concrete faced rock-fill dam during construction, and that the dam water level difference between inside and outside should not exceed 1 m during dam drainage stage.
出处
《人民黄河》
CAS
北大核心
2014年第3期126-128,共3页
Yellow River
基金
黄河上游水电开发有限责任公司科研项目(2010-041-HHS-KJ-X)
关键词
面板堆石坝
开挖料
湿化变形
坝体浸水
积石峡水电站
concrete faced rockfill dam
excavated rock
wetting deformation
dam immersion
Jishixia Hydropower Station
