泥湾门大桥浅海大直径嵌岩桩施工技术

Construction Technology of Large-diameter Pock Embedded Foundation Pile in Niwanmen Bridge

介绍了在浅海施工直径２．２０ｍ嵌岩桩的技术问题。包括平台的搭设，用刮刀钻头与牙轮钻头钻进克取硬岩一次成孔工艺，利用冲洗液平衡原理处理浅海钻进护简断裂的成孔方法，改进浇灌清孔流程，保证浇灌质量。

This article introduces tthe technical problems in comstruction of 2.20m .diameter rock embedded pile,including building of platform, once hole completion technique with drag bit and rock bit penertating hard rock,treating muff breaking at off-shore area by using flush fluid balance principle and improving flowsheet of grouting to gaurantee the quality.