Drill hole Enlarging method with Pile Fixation tool Installation Method

摘要

In order to secure excellent bearing capacity in the field of drilling foundation piles in the construction industry, the expansion of the drilling foundation and boreholes was a ground task. The present invention enlarges the borehole wall using “L-shaped cantilever bit” and “conical centering cone”, and the “fixture equipped with tapered guide bar and wing plate” devised in the present invention is used for anchorage in the enlarged hole. It is a construction method to install a stronger, more reliable and economical pile foundation by installing