Improving the drilling efficiency of bored piles is an important issue in bridge engineering.This article proposes a new construction system and method for bored piles with mud free water drilling.This system combines pump suction reverse circulation with impact drilling depth,which not only solves the problem of rock layers being only constructed with impact drilling,while impact drilling can only use mud to suspend drilling slag,but also uses pump suction reverse circulation to solve the slag discharge problem during the drilling and cleaning processes of impact drilling without mud,and timely discharge slag during the drilling process.By applying the system to engi-neering practice,it is proved that the system has good efficiency in slag transportation,slag discharge,and wall pro-tection hole formation.
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