Construction technology of bridge super-long bored pile in deep water;

Experimental study on bearing behavior of super-long drilled pile with the self-balanced load test method;

Under heavy loads,the super-long bored piles behave as end-bearing frictional piles,and their frictional resistance and end resistance are asynchronous and coupling.

For too deep hole there are more possibilities in the construction of super-long bored pile,apt to bring about accidents.

With the quick development of urban construction and increase of super high buildings of Xi an city, the super-longhole bored pile has been presented its unique fascination and broad application field in the base processing, at the same time more strict design plan was needed in the pile foundation design.