摘要
向家坝沉井群作为向家坝水电站左岸主体及导流工程的一部分,由10个23 m×17 m沉井群组成,下沉深度最大为60 m。沉井群下沉需穿越砂卵石层、砂层、含崩块石砂卵石层等强透水覆盖层,嵌入细砂岩层,沉井群下沉施工难度国内外罕见。针对特殊的地质、水文条件,通过确定合理沉井下沉顺序、下沉工艺,顺利地完成沉井群的下沉施工,并总结出一套沉井群下沉施工方法。
The Xiangjiaba open caissons group is part of the diversion works for Xiangjiaba Hydropower Station, and it is an important part of the main structure on the left bank. It consists of ten open caissons groups with size of 23 m×17 m. The maximum sinking depth is 60 m. The caissons must penetrate into strong permeable layers including sandy gravel layer,sandy layer and sandy gravel layer with collapsed stones,and embed into fine sandstone layer. The caisson construction is tremendous difficult in the world. According to special hydrogeological conditions,the rational caisson sinking sequences and caisson sinking technique are determined,and the caissons group sinking is completed successfully. A series of construction methods for caisson sinking are summarized.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2014年第S1期2957-2963,共7页
Chinese Journal of Rock Mechanics and Engineering
关键词
桩基础
复杂地质区域
超深沉井群
施工技术
pile foundation
complex geological areas
ultra-large-scale caissons foundation
subsidence construction technology
