Analysis and Treatment Measures of Hole Collapse of Bored cast-in-place Pile on Super Large Bridge
Special Bridge is A major infrastructure project in our country,the foundation of its bridge piers has adopted the structure of cast-in-situ piles.However,the stability of the clay loess and fine gravel soil in the upper part of the pile is poor,and the lower part is composed of sandstone and mudstone interlayer,which is easy to collapse holes,which poses A threat to the engineering safety in the construction process.In order to solve this problem,the hole collapse phenomenon can be effectively suppressed by limiting the peripheral vibration operation process,increasing the length of the casing,increasing the mud specific gravity,using slow pressure and slow lifting to reduce the drilling rate and shorten the working time.
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