In view of very large scale of Y-pipes of this project, the design of combined bearing of Y-pipe and surrounding rock is adopted to decrease the difficulty of fabrication and erection.

• 摘要西龙抽水蓄能电站岔管规模远超过国内已建工程，为降低制作、安装难度，考虑岔管与围岩联合受力设计。