1CFA工法简介CFA工法，全称螺旋钻具连续钻桩及灌浆（Con－tinuousFlightAuger）施工法，是一种新型的复合地基处理方法。采用的主要设备为长螺旋钻机和砼泵及其它辅助设备如搅拌机等，其主要施工步骤如下：（1）改造长螺旋钻机，在动力头上部安装一连接弯头，用于与砼输送管连 1CFA construction method Brief introduction CFA construction method, full name auger drilling continuous drilling pile and grouting (Con-tinuousFlightAuger) construction method, is a new type of composite foundation treatment method. The main equipments used are long spiral drills and concrete pumps and other auxiliary equipment such as mixers. The main construction steps are as follows: (1) Transform the long spiral drilling rig and install a connecting elbow on the upper part of the power head to connect it with the concrete conveying pipe.