乔旦水电站工程,包括一条长米1250米不衬砌的高压斜井。斜井静水压头880米角度为40°,用全断面掘进机开挖。还有一条近于水平的长5100米的输水洞也用全断面掘进机开挖。地下厂房和14.5公里长其它隧道,则用钻爆法开挖。本工程开挖硬岩总计40万米~3。合同工期仅二年半。引起各界关注。 Qiao Dan hydropower project, including a 1250 meters long rice lining high pressure incline. Inclined well hydrostatic head 880 m angle of 40 °, with full-face boring machine excavation. There is also a near-horizontal 5100 meters long water tunnel also used full-face boring machine excavation. Underground powerhouse and 14.5 kilometers of other tunnels, the use of drilling and blasting excavation. The project excavation of hard rock total 40 million meters ~ 3. Contract duration of only two and a half years. Aroused the attention of all circles.