科研之友
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摘要
Occurrence of a hydraulic jump can reduce the balance weight of a slab in a stilling basin.Ignoring them would result in a dangerous situation.In this paper,a slab failure case,which occurred in Guangzhou is examined carefully by numerical simulation.The method to locate a hydraulic jump and that to simulate the draining holes are addressed in details.The restoration and its effect is also discussed.It found that,1)The occurrence of a hydraulic jump both reduces the balance weight of a slab and changes boundary condition for seepage flow significantly,2)It is the ignoring the static effect of a hydraulic jump that makes the failure happen,3)Draining holes in the slab reduce the water pressure difference between the top and bottom and eliminate the static effect,and 4)for a slab with draining holes,stability analysis without taking into account the hydraulic jump static effect is acceptable for its result is on the safe side.
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