Research On The Original Place Resistance Experimentation Of Hydraulic Pressure Cast-In-Place Piles

Cast-in-place piles with expanded branches or plates based on common concrete bored piles are a new type of piles foundation which have the specialty of high vertically bearing capacity and have been marked both economic and social benefits. Especially in the resist draw load, it indicates a broader application scope .However, because of the poor application of cast-in-place piles in the practices, almost all the experiments are based on modeling experiments. It is difficult to reveal true state of cast-in-place piles in resisting load. So it is necessary to do lots of cast-in-place piles practical experiments. Also it is necessary condition that cast-in-place piles technology grown up and spread in engineering.In particular, firstly we account for the basic theory of cast-in-place piles and describe the process of construct and molding. Secondly, we recommend the practical experiment of cast-in-place piles, including field solid and liquid qualification, experiment purpose, experiment project, experiment equipment, experiment process and the notice of experiment. Thirdly, we processed and analyzed experimental daters,studied the rule of strength transferring,and studied the rule of strength transferring of check resistance and side of peg rub resistance, contrasting with common re-draw peg. At last, we advance some unfathomed problem and prospect foreground of cast-in-place piles.