Research on Optimizing Precast Water Head on Preloading Filling Spiral Case of a Large-Scale Hydropower Station
In combination with the practice of a pumped storage hydropower station, a 3-D nonlinear finite element method on the preloading filling spiral case is carried out to compare and analyze stresses of the steel spiral case and hoop reinforcement, the stress and bearing ratio of the surrounding concrete, the contact state between the spiral case and concrete in different precast water head. The results indicate that the stress of the surrounding concrete will get better with the increasing of precast water head. But there is a distance between the spiral case and the surrounding concrete when the water head is excessive, which is unhelpful for operating of the unit. When the precast water head of the spiral case is 439m or so, it can play a greater degree of mechanical characteristics of steel and concrete under the premise of operating stably of the unit.
Chaohe Chen, Yong Huang and Guangfan Li
H. L. Wu et al., "Research on Optimizing Precast Water Head on Preloading Filling Spiral Case of a Large-Scale Hydropower Station", Advanced Materials Research, Vols. 243-249, pp. 6183-6187, 2011