摘要
多布水电站覆盖层深厚,地质条件复杂,上部地层块漂石、卵砾石等粗颗粒分布广,级配差、透水性大、砂层较厚、较密实。振冲桩施工难度大,该工程采用"引孔振冲法",增大水管注水量防止塌孔,外加风管用风水联合冲洗扬砂,实现在密实砂层中快速安全成孔成桩的预期目标。
Duobu Hydropower Station is with deep and thick overburden. Its geological conditions are complicated. Block stones, boulders and cobble gravel, etc are available in the upper stratum. Theses coarse grains largely distribute, their gradation is weak, permeability is high, the sand layer is thicker and dense. Construction of the vibrating pile is difficult. Therefore, the vibrating method with approach hole is applied in the project. Quantity of water injection is increased to prevent from the hole collapse. Additionally, the compressed air is ap- plied. With help of the increased water, hole is flushed and sand is removed so that the pile hole and pile in the dense sand layer can be pro- duced rapidly and successfully.
作者
杨伟
廖祖梁
YANG Wei LIAO Zuliang(Sinohydro Foundation Engineering Co. , Ltd. , Tianjin 301700,China Tibet Niyang River Hydropower Development Co. , Ltd. , China Guodian Corporation, Linzhi, Tibet 860000, China)
出处
《西北水电》
2017年第2期58-62,共5页
Northwest Hydropower
关键词
多布水电站
振冲桩
施工技术
Duobu Hydropower Station
vibrating pile
construction method
作者简介
杨伟（1972-），男，四川省都江堰市人，工程师，从事水利水电基础处理工程施工．
