钱塘江河口异型块体抗冲稳定特性试验研究

Experimental study of profiled-block stability in Qiantangjiang estuary

利用涌潮水槽模拟研究钱塘江河口海塘护脚异型块体在涌潮作用下的稳定特性 ,结合现场调查分析 ,认为单纯增加异型块体重量来提高块体的抗冲稳定性 ,效果不明显。有的异型块体尺寸、重量增加后 ,其稳定性反而降低。研究认为 ,对于涌潮作用的护脚异型块体 ,可通过在异型块体内嵌固块石混合料 (以减小异型块体群体孔隙率 )

The stability of profiled-block used as the toe-protection of sea defense works in Qiantangjiang estuary under the action of tidal-bore was researched by a tidal-bore flume. The laboratory test results, as well as the field investigation showed that it has little effects to improve profiled-block's stability only by raising the block's weight, on the contrary, for a few kinds of profiled-blocks, the block's stability falls by increasing its size. It is concluded that, for the profiled-blocks of toe-protection under strong tidal bore condition, their group stabilities are improved by reducing porosities among the blocks filled with mixed stone materials.