Application of long helical drilling pressure filling pile process in technical renovation at Tianzhuang coal preparation plant

According to the difficulties encountered in constructing of speed loading station,Tianzhuang coal preparation plant decided using the long helical drilling pressure filling pile process in constructing of the foundation,the paper detailed described the operation method and control points of the construction process.The construction practice shows that using the long helical drilling pressure filling pile process can remarkably shorten the construction period,saved the construction cost,so it has the good prospect of popularizing and application in the foundation construction in the reformation of the old plant.