大直径深长钻孔灌注桩的施工影响因素分析

Analysis on the influence of the construction factors about large diameter long bored cast-in-place Piles

针对钻孔灌注桩特殊的成桩特点,对影响大直径深长钻孔灌注桩的施工因素进行了探讨,分析了桩侧泥皮、桩底沉渣、时间效应、施工工艺等对单桩承载力的影响机理,提出了提高大直径深长钻孔灌注桩承载力的有效途径。

The influence of construction factors were discussed for the special characteristic of the bored cast-in-place piles. Some impact mechanism to the bearing capacity of single pile was analyzed, such as the side mudcake, the bottom sedimentary, time effect, construction technique etc. Finally, the author put forward the quality of construction and adopting grouting technique.