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开发能源,建设水电站,都要修筑拦河大坝。而坝基必须座落在完整新鲜的岩石基础上。过去,坝基开挖主要靠手持式凿岩机和人工打眼,工人劳动强度大,施工进度缓慢。七十年代,随着工程建设规模的扩大,爆破新工艺、新方法的应用,开始使用潜孔钻机等凿岩设备。本文根据我们的经验和体会,简要地介绍YQ100B型潜孔钻机在水电工地的应用情况,供有关同志参考。一、坝基开挖概况东江水电站位于湖南来水资兴市东江镇上游11公里的方石峡谷段。坝址河谷呈“V”形,两岸对称,自然坡角45°～60°。左右岸
Development of energy, construction of hydropower stations, have to build dam dams. The dam foundation must be located on the basis of a complete fresh rock. In the past, dam foundation excavation mainly rely on hand-held rock drill and artificial drilling, workers labor-intensive, slow construction progress. In the seventies, with the expansion of construction scale, the application of new blasting techniques and new methods, drilling equipment such as down-hole drilling rigs began to be used. Based on our experience and experience, this article briefly introduces the application of YQ100B DTH drilling rig in hydropower sites for reference by the relevant comrades. First, the dug excavation profile Dongjiang Hydropower Station is located in Hunan Shixinxing Dongjiang upstream 11 kilometers of the Fangshi Canyon. Dam valley was “V” shape, cross-strait symmetry, natural slope angle 45 ° ~ 60 °. Left and right bank