过去在地下连续墙施工中,多采用机械传动的冲击钻或液压传动的挖斗。实践证明,采用这类设备不可能迅速、经济和高质量地完成大深度地下连续墙的施工,而且当遇到坚硬地层时还必须采用钻机或炸药进行处理。1973年,法国索莱唐日公司(Soletanche)开始研制液压铣钻机(Hydrofraise),并于1974年生产出第一台样机。据统计,截止1986年,在法国、美国、日本、德国和奥地利等国共有15台液压铣钻机在运行,累计完成的地下连续墙的钻进工程量达40万m~2。 In the past in the construction of diaphragm wall, the use of mechanical transmission hammer drill or hydraulic drive bucket. Practice has proved that using such equipment can not be completed quickly, economically and with high quality underground diaphragm wall construction, but also when faced with hard formations must also be used rig or explosives for processing. In 1973, Soletanche started to develop Hydrofraise and produced its first prototype in 1974. According to statistics, as of 1986, a total of 15 hydraulic milling rigs were in operation in France, the United States, Japan, Germany and Austria. The accumulated underground diaphragm wall drilling project reached 400,000 m 2.