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北京京水利基础总队１９９２年从国外引进２台液压导板抓斗、全液压履带式起重机和超声波测斜仪等。对这些设备进行配套使用，已完成４道水电工程混凝土防渗墙和４道城区钢筋混凝土地下连续墙以及１１０根矩形桩的施工。使用ＢＨ型液压抓斗进行混凝土防渗墙造孔施工，可提高建墙速度，一台抓斗造孔工效相当于１５～２０台冲击钻机；减少施工人员，一台抓斗由１０人操作，而１５～２０台冲击钻机需１５０～２００人操作；节省护壁泥采用量，抓斗造孔施工为０．３ｍ￣３浆／１ｍ进尺，而冲击钻需３ｍ３桨／１ｍ进尺；减少施工临建和生活临建；无嗓音，无震动，泥浆污染少，为文明施工创造了条件，是比较好的造孔机械。
Beijing Beijing Water Foundation 1992 introduced from abroad 2 sets of hydraulic guide grab, full hydraulic crawler cranes and ultrasonic inclinometer. Supporting the use of these facilities, we have completed the construction of 4 hydropower concrete cutoff walls and 4 urban reinforced concrete continuous diaphragm walls and 110 rectangular piles. The use of BH-type hydraulic grab for concrete cutoff wall hole construction, can increase the speed of wall construction, a grab hole effect equivalent to 15 to 20 sets of impact drilling rig; to reduce construction workers, a grab by 10 operations, While 15 to 20 percussion rigs need 150 ~ 200 operations; save the amount of protective wall mud, grab construction for the 0.3m ~ 3 slurry / 1m footage, while the impact drill required 3m3 paddle / 1m footage; reduce the construction of temporary And life temporary construction; no voice, no vibration, less mud pollution, creating conditions for the construction of civilization, is a better hole making machinery.