There are some problems in the construction of large-diameter bored pile in deep water,such as diffi-cult to locate the protection cylinder,large sand content and difficult to control the quality of pile foundation.In order to effectively control the construction quality of pile foundation,based on the construction of steel tube composite pile for No.18 main pier of main branch Bridge of Hanjiang East Bridge,the project features and specific construction techniques were described.The main construction methods adopted include guiding frame and floating ball detection in the tube to locate the steel shield in deep water,air lift reverse circulation and mud separator to clear the hole,and ball pulling method and pile head overirrigation to inject concrete.It ensures that the pile quality inspection of deep-water large-diameter bored pile is class Ⅰ pile.At the same time,the quality control measures of key processes in drilling and filling construction are analyzed,and the effective control of construc-tion quality was realized,which can provide reference for the construction quality control of similar projects.
关键词
大桩径/钢管复合桩/钻孔灌注/质量控制
Key words
Large pile diameter/Steel pipe composite pile/Drilling and perfusion/Quality control
维普
万方数据