跨海桥基海上大口径钻孔施工技术

Large Diameter Hole Construction Techinques for Over-sea Bridge

摘要:

青岛女姑山跨海桥墩基础，采用大口径海上钻孔灌注桩施工，结合工程实践，分析了海潮对地压的影响与钢护筒埋设最佳值；探讨了海上施工泥浆循环系统的合理布设；海水泥浆的配制维护及钻孔护壁等问题。

Abstract:

Large diameter bored piles have been used for Lugushan over sea bridge in Qindao.The effects.of sea tide on formation pressure and optimum set depth of steel comductor are analyzed with reference to consruction practice.Proper placement of the mud circulation system for marine drilling,formulation&maintemance of seawater mud and hole wall protection are also discussed.