海滩围垦工程施工局部冲刷问题分析

Analysis on Partial Scouring of Polder Construction

沿海地区海滩围垦工程围区在施工过程中随着潮水涨落,围区内外会产生较大的水头差和围涂区域引起冲刷.施工工序安排的不合理所形成的围区内某些区段低高程段过窄是造成影响冲刷的主要原因,对围区施工过程、围区潮汐和冲刷流速计算和围区冲刷机理的分析发现,对施工区域的合理分段、制定和调整施工工序可以有效减少海涂冲刷.

Tidal bore and fall in coastal areas result in severe bead difference in polder construction and scouring in polder area. Being excessively low in low-elevation block resulted from unreasonable working procedure is the main reason for scouring effect. Some countermeasures are suggested on how to prevent beach scouring effectively, including reasonable block of the constructing areas and flexible adjustment of working procedure based on the analysis of scouring speed, scouring mechanism and tidal bore and fall in polder area.