采用灌注桩双护筒工艺穿过海底抛石斜坡的应用研究

Study on technology for construction of cast-in-place piles with double casing penetrating a riprapped slope on seabed

福建神华罗源湾电厂新建工程深排工程施工时,因施工区域处于码头抛填块石基床坡面,地质条件差,极易产生坡面滑移,对海上灌注桩施工影响十分严重,常规灌注桩施工方法无法完成钻孔。文章介绍了以双护筒工艺完成深排工程抛填块石坡面灌注桩施工,并针对钻孔过程产生护筒滑移和漏浆等问题,提供了有效控制方法。

During the construction of the deep drainage project for the new works for Shenhua Luoyuan Bay Power Plant in Fujian Province,the construction of offshore cast-in-place piles was seriously impacted due to the bad geological conditions as the construction area was located in the riprapped slope of the jetty,easily causing the slipping of the slope.The boreholes for cast-in-place pile construction cannot be made with the conventional method.The paper describes how the construction of cast-in-place piles on the riprapped slope was completed by using the double casing technology and presents effective measures to control the slipping of the casing and the leakage of slurry during boreholing.