Evaluation Research on Energy Dissipation Layout of Parallel Spillway Tunnels in Narrow Valleys
摘要
The energy dissipation safety of the single-sided parallel spillway tunnels in narrow valleys is the key to ensuring the flood discharge safety. The layout methods and evaluation indicators of spillway tunnels can effectively measure the layout reliability of. Presently, the overall layout of spillway tunnels mostly relies on model tests, and indicative evaluation methods are still rare. Based on energy dissipation and the stability of bank slopes, this paper proposes the capacity index of the energy dissipation in narrow valley. Combining the non-superposition of scour holes and the energy dissipation effect, a layout method of the spillway tunnels with multi-objective hydraulic coordination is established. The rationality of the evaluation indicators has been verified by the energy dissipation schemes of 300-m-level high dam spillways in narrow valleys such as Baihetan and LCRM Hydropower station.