上海地区Φ550mm以下小直径钻孔灌注桩施工探索

Discussion on Construction of Bored Grouting Pile with Diameter Less than 500mm in Shanghai Area

理论分析、探讨了上海地区钻孔灌注桩的最小极限施工直径。通过Φ400 mm钻孔灌注桩施工实例,探讨直径<550 mm的钻孔灌注桩的施工技术措施和质量保证措施,并探讨更小直径钻孔灌注桩设计施工的可能性。

The smallest diameter limit for bored grouting pile construction in Shanghai area is analyzed theoretically and discussed.By a construction case of a bore grouting pile with the diameter of 400 mm, the discussion is made on the meas-ures of construction technologies and quality assurance for the bore grouting pile with the diameter less than 550 mm, and the possibility of the design and construction for bore grouting pile with even smaller diameter is also explored.