Causes of breakage of tube pile and practical study on rectification-joining method

The main causes of breakage were concrete tube pile instability of foundation pit or failure of its bracing,soil squeeze due to pile driving,incorrect excavation and incorrect heap of soil.The main steps of the rectification-joining method for broken tube piles were as follows: to rectifying sloping piles,closing cracks,concrete filling and quality testing,with some ways to deal with the problems during practical manipulation.Finally,it was shown with a practical case that this method was effective.