According to the detail description on one project geological condition,it analyzes the test result of its single pile vertical anti-pressure statistic loading,results prove that the pile loading resulted from site rotary hole forming is obviously lower than pile resulted from impact-shock hole forming,thus improving application of the impact-shock hole forming technology.

0 m in Karst Region, and expounds the experiences of adopting the technique of pore-forming with impact+underwater tremie method to solve the difficult problems in construction.

On the basis of the construction of piling foundation of GuangHe Bridge,the factors met during the process such as geological feature,geologic examination,and drilling technics of drilling and the solution to these are discussed in the paper,and it may provide some useable information for construction in the zone with the same condition.

The paper studies the parameters affecting the forming of sheet with punching hole by simulation software and orthogonal experiment,and concludes the law of the parameters affecting the forming.

Discussion on pavement reconstruction using impact compaction technique;