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黄河下游部分堤段因距河槽、险工较远或距河槽虽近但河床为质地坚硬的板沙或淤泥,不宜用冲吸泥船冲填加固,而应用绞吸船挖滩吹填加固。挖滩吹填的土料,粘粒含量应低于15％,渗透系数应控制在10~(-3)～10~(-6)cm/s;年吹填厚度可按年固结厚度确定;滩区长度以150m左右为宜。据经济分析,当冲吸含沙量低于150kg/m~3,或含沙量较高但输距超过4km时,采用挖滩吹填比冲吸泥船冲填更为经济。
Part of the embankment in the lower reaches of the Yellow River is not suitable for flushing and filling with muddy muddy silt due to its distance from the river channel or its dangerous workers or its proximity to the riverbed. Dredging and dredging materials, clay content should be less than 15%, permeability coefficient should be controlled at 10 ~ (-3) ~ 10 ~ (-6) cm / s; The length of the beach area should be about 150m. According to economic analysis, it is more economical to use the dredging and sucking dredger for flushing when the sediment concentration is less than 150kg / m ~ 3 or the sediment concentration is higher than 4km.