三峡库区深水复杂地质钻孔平台施工技术

Construction Technology of Complicated Geological to Deep Water Drilling Platform in Three Gorges Reservoir Area

香溪河大桥位于三峡库区,受库区蓄放水的影响,水位落差超过30 m,且库区地质条件复杂,桩基础钻孔平台施工难度较大。采用深水钻孔灌注桩及钢管柱支撑相结合的重载水上钻孔平台的施工方案,解决了4#墩桩基础钻孔平台的施工难题,同时,介绍了钻孔平台的设计方案、施工工艺流程和施工技术。

Three gorges reservoir water storage affects the construction of Xiangxi river bridge,water level falls over 30m,it has complex geology in reservoir area,the bored platform construction of pile foundation is very difficult,the scene was adopted the deep water bored pile and steel columns supported by field the construction scheme of heavy water drilling platform,which has been achieved good results.This paper focuses on the design plan,construction process and technology of the drilling platform,and has some reference value for pile foundation construction in similar complex geological condition in the future.