高滩粉砂淤泥质滩涂匡围工程龙口施工关键工艺

摘要

With the widespread use of sand-bagged dike structure,the construction technology of the closure of sand-bagged structure is emphasized,and there are many research results,but less research has been conducted on the technology of dike closure under special work conditions.Silt-muddy flat in Jiangsu coastal areas is sensitive to water flow variation due to its thick soil layer.Tidal flats tidal creeks respond strongly to reclamation on tidal flats,making inning-construction project special and increasing the difficulty of construction.By optimizing the construction technology of high beach dike closure constantly,several dikes in Tiaozini phase Ⅰ inning project and Nantong Tongzhou Bay basin 2 inning project,and the tide creek entrance are succeeded in closing eventually.The analysis on the characters of sand-bagged blocking off and riprap assisted closure process can provide references for similar follow-up projects.%随着袋装砂结构大堤的广泛应用,袋装砂结构龙口合龙的施工工艺受到重视,研究成果较多,但对特殊工况条件的袋装砂龙口合龙施工工艺的研究较少.江苏沿海的粉砂淤泥质滩涂因土层深厚,土质对水流变化敏感,滩涂潮沟对滩涂围垦的响应强烈,致使该地区匡围工程龙口合龙工况特殊,施工难度较大.通过不断优化改进高滩龙口合龙施工工艺,最终使条子泥Ⅰ期匡围工程、南通通州湾二港池匡围工程的多个龙口、潮沟口门均成功合龙.通过分析龙口袋装砂封堵及抛石辅助合龙工艺特点,为后续相关工程提供借鉴.