Arranging suspended grids which are called energy dissipation workers in stilling basin can im-prove its effect of energy dissipation,and the double-layer suspended grid in the stilling basin is better than the single-layer suspended grid.Based on the value of the ratio of the depth of the layer and the depth of the pool,0.4,through change ratio of space between grids to depth of stilling basin and number of grids, model experiments were conducted when the design value was 15000 cm3/s,and the results from the ex-periments were compared with the test value 13000 cm3/s.It's concluded that the optimum ratio of the space between grids of double-layer suspended grid to the depth of stilling basin was 1 .2 and the optimum ratio of the number of grids to the depth of stilling basin was 1 .1 .The maximum decline of water level in stilling basin was greatly affected by changing the ratio of the space between grids of double-layer suspen-ded grid to the depth of stilling basin.%消力池内布置悬栅消能工,可以提高消力池的消能效果,消力池内布置双层悬栅较单层悬栅消能效果更优.在层距与池深比值的较优取值为0.4的基础上,通过改变双层悬栅的栅距与池深的比值和栅条数与池深的比值,在流量设计值15000 cm3/s下进行模型试验,并与流量验证值13000 cm3/s下的试验结果进行对比,得到该流量下双层悬栅栅距与池深比值的较优取值为1.2,栅条数与池深比值的较优取值为1.1,改变栅距和栅条数与池深的比值,对消力池内最大水深下降影响较大.
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