Abstract：
The design of the No.3 diversion tunnel of the Jinping II hydropower station involved the assembly of a TBM with a diameter of 12.4m. The staggered construction consequence, which divided into 4 layers with ten steps total, was adopted because of a large section and tight construction schedule. This method is characterized by advance crown exaction, a simulataneous pilot tunnel, parallel construction, and local advance excavation followed by immediate support. This paper introduces the application of this technique to the construction of the Jinping hydropower station.
REN Guo-Qing
.Staggered Construction Technology for a TBM Assembly Cavern with Large Section in the Jinping Hydropower Station[J] MODERN TUNNELLING TECHNOLOGY, 2012,V49(6): 139-146
2012, Vol. 49 