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针对钻孔桩水下施工特点,文章分别对埋设护筒、钻机就位、泥浆制备、钻进、清孔、制作及吊装钢筋笼、安装导管、灌注水下混凝土等8个主要施工环节的控制要点及注意事项进行了阐述,分析了塌孔、缩颈、歪桩、斜桩、断桩、钢盘笼上浮、导管上浮等常见问题产生的原因,并提出了相应的处理措施。
Aiming at the underwater construction features of bored piles, this paper respectively controls 8 major construction links such as buried casing, drilling machine in place, mud preparation, drilling, clear hole, making and lifting of steel cage, installation of conduit and perfusion of underwater concrete Points and precautions are discussed. The causes of the common problems such as collapse hole, necking, crooked piles, inclined piles, broken piles, steel cage floating and catheter floating are analyzed. Corresponding treatment measures are put forward.