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在黑河大坝坝基的处理中，由于设计变更，临时增加了固结灌浆孔的工作量，又由于这一段工程的场地狭窄，即使投入１８２０台地质钻机同时工作也要三、四个月才能完成。为了加快施工进度，我们采用了英格索兰ＬＭ－５００Ｃ露天液压钻机钻凿固结灌浆孔。该机的钻进速度可达０
During the treatment of the dam foundation of Heihe Dam, the workload of consolidation grouting holes has been temporarily increased due to design changes. Due to the narrow space of this project, even the rigging of 1820 geological rigs takes about three to four months To be completed. In order to speed up the construction progress, we use the Ingersoll Rand LM-500C open-air hydraulic drilling drilling grouting hole. The machine’s drilling speed up to 0