大辽河下游一河段,1984年开始试用预制空心混凝土板护岸,效果很好,以后逐年投入,到1988年,此种护岸达850m。原设计最高水位3.2m,岸边河床底高程1.5m,堤顶高程4m,堤顶宽4m,内坡用空心混凝土板,坡比高为1∶0.3。施工时先修整堤坡,然后将基底整平夯实。空心混凝土板可根据施 A section of the lower reaches of the Liaohe River, started trial prefabricated hollow concrete slab revetment in 1984, the effect is very good, and later year by year, in 1988, such revetment up to 850m. The original designed maximum water level is 3.2m, the bank elevation at the bottom of the bank is 1.5m, the embankment elevation is 4m and the embankment roof is 4m wide. The hollow concrete slab is used for the inner slope, and the slope ratio is 1: 0.3. Construction first dike embankment, and then tamping the base solid. Hollow concrete slabs can be applied