Large Multi-level Riverside Reservoir Spillway Dissipation Test

In recent years, the major droughts and floods are happened frequently in China. Water distribution is uniformity in space. Many areas in China face the problems of serious shortage of water. By the hands of balanced development of energy, water resources is a traditional and regrew clean energy. At the same time is a traditional water resources, renewable clean energy, so whether from the water as the basic energy resources or as a strategic point of view, China's current stage of water needed to develop hydropower. And necessarily involves the construction of water conservancy energy dissipation facilities, the spillway is the main energy dissipation facilities in its design relates to the safety of the water conservancy project. With the energy dissipation of the deepening and multi-level energy dissipation more and more used.This paper introduces the multi-level study abroad status of energy dissipation, energy dissipation at home and abroad for studies have focused on a single energy dissipation theory, numerical simulation and experimental study of energy dissipation for the multi-level system of yet there have been. Articles from start multi-level theory of energy dissipation, focuses on the impact of multi-level classification of the two major principles of energy dissipation, hydraulic conditions and material conditions of the principle of principles. Hydraulic conditions and material conditions obtained on the spillway of the classification are interrelated. When the discharge channel length, divide large, single-level energy dissipation hours prone to high-speed water flow, affecting building safety, and not the economy, this time should adopt the multi-level energy dissipation. Multi-level energy dissipation should be reduced to grade level within a single flow velocity, drop chute for each level should not be too large to avoid high-speed flow, the occurrence of cavitation, cavitation, impact and abrasion damage and other negative phenomena of building safety. Add in the drain tank facilities along the energy dissipation in the chute at the end of each level should be set to the corresponding energy dissipation and transition in order to reduce the kinetic energy, reduce the lower the initial flow rate, adjust the lower the initial flow. Lower in the flow, use an ordinary concrete chute construction materials can meet the requirements, when the single-level difference greater energy dissipation vent tank facilities are not set, the flow rate is larger, should use the appropriate abrasion resistance of concrete to ensure building safety. Reasonable choice matching, multi-level scientific classification of the energy dissipation can guarantee the safety of the spillway can achieve better economic results.The Dahebian reservoir spillway base line with the overall design of multi-level classification of the basic principles of energy dissipation, through the model test, that the multi-level energy dissipation of the scientific analysis of the hierarchical principle is reasonable. Based on the test appeared in the local adverse hydraulic phenomena on the spillway of the original scheme was modified, and ultimately arrive at a more reasonable optimization program, improve the multi-level energy dissipation theory.