Using ANSYS software, this paper conducted numerical simulation and optimization on key constructional techniques, such as the height of excavated bare surface at the mouth of surge tank, advanced consolidation grouting of surrounding rock, grouting hole anchor line forecast fasten technical, lock collar beam fasten at the pit bank, the support pattern of pneumatically placed concrete and anchor prop, whole overhang concrete lining and steel lining and so on for Futang surge tank in Minjiang river, Sichuan province. The paper also makes numerical emulation of the whole progress and monitoring feedback analysis. This has not only guided the safe construction of the project but also has provided good references to other projects alike.
