富春江中埠大桥深水钻孔桩施工技术

Construction Technique of Deepwater Bored Pile in Zhongfu Large Bride

在 ３２０国道富春江中埠大桥施工中，针对大倾斜、高强度裸露岩石上大桩径深水钻孔灌注桩施工的具体特点，选用经过改进的小型冲击钻机，采用单体稳固钢护筒固定方案，取得了满意的效果。对此方案的确立和实施进行了较为详细的介绍，并进行了必要的理论分析和研究。

During the construction of Fuchunjiang Zhongfu large bridge on No. 320 state road, improved small type percussion driller and fixing approach with single steel casing are used, and the result is satisfactory. In this paper, the scheme option, construction and theory analysis are introduced in detail.