仙居抽水蓄能电站下水库进出水口基坑开挖技术

Foundation Excavation Technology of Inlet /Outlet of Lower Reservoir in Xianju Pumped-storage Power Station

通常情况下,抽水蓄能电站下水库进出水口施工前期,多为静水中填筑土石高围堰,然后在围堰的挡护下进行下水库进出水口基坑施工,由于进出水口基坑狭小,边坡高陡,且周边已建设施较多,同时又受汛期影响,工期紧张。基坑开挖是进水口施工的首要工序,尤为重要,通过对仙居抽水蓄能电站下水库进出水口基坑开挖进行研究,总结了其开挖技术要点。

Under the normal circumstances, at the construction earlier stage of inlet / outlet of lower reservoir in Xianju Pumped-storage Power Station, in the ordinary course, the debris high cofferdam will be filled still in the water. The foundation excavation of inlet / outlet of lower reservoir is constructed under the cofferdam protection. Because of the narrow inlet and outlet foundation excavation, high and steep slope,many surrounding infrastructure facilities,meanwhile combined with the influence of the flood season, the construction period is very tight. The foundation excavation is the first step in the inlet / outlet construction. Through the research of foundation excavation technology of inlet / outlet of lower reservoir in Xianju Pumped-storage Power Station,the excavation key points are summarized.