PRESSURE OBSERVATION FOR THE 1# ORIFICE TUNNEL IN XIAOLANGDI PROJECT

摘要

This paper presents the field pressure observation for 1# orifice tunnel in Xiaolangdi Project with the reservoir water level of 210m. The time-average pressure and pulsation pressure on the wall has been given with the full opening and partial openings of gate. A notable energy dissipation result for three orifices has been achieved with the dissipating coefficients of 1.19, 0.57 and 0.63. The field observation results also show a good agreement with the model test. The measured pressures will be used for the cavitation analyses for the orifice tunnel together with cavitation observation.