拉姆2水电站引水竖井施工方案研究

Research on Construction Scheme of Headrace Shaft for Ramu-2 HPP

拉姆2水电站引水竖井和竖井底部的高压隧洞为该工程引水系统施工的难点,且其高压隧洞处于施工关键线路上,不具备作为引水竖井底部施工通道的条件。阐述了对引水竖井与调压井布置方案进行调整的建议方案,即将两井采用相同的中心线合并布置,采用矿山快速正井法施工方案开挖竖井以减少施工临建成本和措施费用,缩短了施工工期。

The headrace shaft and the high-pressure tunnel at the bottom of the shaft in Ramu-2 HPP pose challenges for the construction of the headrace system,and the high-pressure tunnel is on the critical path of the construction process,which cannot be used as the bottom construction access of the headrace shaft.The authors suggest that the layout scheme of the headrace shaft and surge shaft be adjusted.In the adjusted scheme,the two shafts are arranged by sharing the same center line,and the fast downward excavating method is adopted to reduce the cost of temporary facilities construction and measures,as well as shorten the construction period.