海灘圍墾工程施工局部沖刷問題分析

海灘圍墾工程施工局部沖刷問題分析

概述: 沿海地區(qū)海灘圍墾工程圍區(qū)在施工過程中隨著潮水漲落, 圍區(qū)內(nèi)外會產(chǎn)生較大的水頭差和圍涂區(qū)域引起沖刷.施工工序安排的不合理所形成的圍區(qū)內(nèi)某些區(qū)段低高程段過窄是造成影響沖刷的主要原因, 對圍區(qū)施工過程、圍區(qū)潮汐和沖刷流速計算和圍區(qū)沖刷機理的分析發(fā)現(xiàn), 對施工區(qū)域的合理分段、制定和調(diào)整施工工序可以有效減少海涂沖刷.

關(guān)鍵詞: 海灘圍墾; 局部沖刷; 施工工序; 問題分析

Tidal bore and fall in coastal areas result in severe head difference in polder construction and scouringin polder area . Being excessivelylowinlow- elevation block resulted fromun reasonable working procedure is the mainreasonfor scouring effect . Some countermeasures
are suggested on howto prevent beach scouring effectively , including reasonable block of the constructing areas and flexible adjustment of working procedure based onthe analysis of scouring speed , scouring mechanismand tidal bore and fall in polder area.