岩石河床水中钻孔桩平台施工技术研究

Technology Research on Rock River Bed Water Drilling Pile Platform Construction

结合重庆东环铁路明月峡长江大桥#2索塔基础施工实例,叙述了在长江上游河床无覆盖层的裸岩上,采用水下爆破开挖承台基础,浮吊分组吊运岸边拼焊钢护筒,灌注封底混凝土固定钢护筒,形成水中钻孔桩施工平台的施工技术。通过现场实施效果表明:该施工技术合理有效,可供类似工程参考和借鉴。

Taking Chongqing east ring railway Mingyue Gorge Yangtze river bridge#2 cable tower foundation construction as an example,this paper describes the construction technology of creating water drilling pile construction platform on the bare rock of the upper Yangtze river bed without cover layer through underwater blasting and excavation pile caps and floating crane group lifting on-shore tailor-welded bottom sealing concrete grouting steel retaining cylinder. Field application effect shows that this technology is reasonable and effective which can be used as a reference for similar projects.