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水下混凝土灌注桩的作用能够承受较大的荷载和减少建筑物不均匀沉降;同时,不受水流冲刷的影响;而且具备施工方便,易于掌握等特点。因此水下混凝土灌柱桩基础在水利工程中得到了广泛的应用。文章根据施工实践简述了混凝土灌注桩的施工工艺,护筒埋设、钻孔设备的安装到位、钢筋笼的制作及要求、灌注桩的混凝土强度等级须符合设计要求及相关规范的有关规定、钻孔及水下混凝土的灌注诸多施工作业操作及质量控制要点。
The role of underwater concrete bored piles can withstand large loads and reduce uneven settlement of buildings; at the same time, it is not affected by water scouring; besides, it is convenient for construction and easy to grasp. Therefore, underwater concrete irrigation pile foundation in water conservancy project has been widely used. According to the construction practice, the article briefly describes the construction technology of concrete pouring pile, the construction of the retaining tube, the installation of drilling equipment in place, the making and requirement of the steel cage, the concrete strength grade of the cast-in-place pile complying with the design requirements and relevant regulations, Hole and underwater concrete perfusion Many construction operations and quality control points.