在防渗墙施工中,一种能有效提高接缝质量,加快成墙速度,并能降低墙体材料消耗的液压双反弧钻具,通过液压泵站的控制,驱动油缸使扩张机构动作,使钻刃向外扩张并与弧形孔壁接触,借助钢绳的提升和钻具自重的下落作用,实现在孔内往复升降并凿除墙端头接触面 In the construction of cutoff wall, a hydraulic double reverse arc drilling tool which can effectively improve the quality of seams, speed up the wall forming speed and reduce the consumption of wall materials can be driven by the hydraulic pump station to drive the expansion cylinder to operate, So that the drill blade outward expansion and contact with the arc-shaped hole wall, with the help of the lifting of the steel wire rope and the falling weight of the drilling tool to achieve reciprocating movements in the hole and cut the wall end contact surface