lling process ,a series of measures were taken ,including adjusting the drilling pressure ,drilling speed and slurry gravity and adding stabilizers according to different stratum ,so as to en‐sure the smooth formation of holes .The engineering practice proves that by pre‐strengthening thepiles via injecting tremie concrete around the pile circumference ,adopting high‐quality slurry sup‐porting wall and adding stabilizers ,the construction of a total of 66 bored piles for the No .3 ,No .4and No .5 pylon piers were pleted ,and all the piles were identified as grade Ⅰ piles .Key words :bridge foundation ;compresso‐crushed zone ;oblique slate surface ;deep water ;large diameter bored pile ;pre‐strengthening by concreting ;high‐quality slurry ;bridge construc‐tion(编辑:陈 雷)42 世界桥梁 2015 ,43(2)
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