爆破挤淤在深厚软土海堤合龙方案中的应用  

Application of blasting compaction technology in closure section construction of breakwater in deep soft foundation

作　　者：乔伟 方后春 QIAO Wei;FANG Hou-chun(CCCC Third Harbor Consultants Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]中交第三航务工程勘察设计院有限公司,上海200032

出　　处：《水运工程》2021年第5期61-64,共4页Port & Waterway Engineering

摘　　要：针对深厚软基中爆破挤淤堤头隆起大量淤泥包影响龙口处海堤落底效果的问题,展开龙口合龙方案的分析研究。依托鱼山南堤工程,首先分析爆破挤淤的装药工艺,测量淤泥包隆起厚度,再结合龙口流速确定合理的口门宽度,最后通过设置子堤向堤身两侧多次侧爆形成龙口处的堤身结构。经钻孔检测,龙口处爆破挤淤落底质量良好,合龙方案可满足设计断面要求。To solve the problem that a large number of silt bulges at the head of the deep soft foundation and affects the bottom falling effect at the embankment gap,we carry out an analysis and research on the closure method of the embankment gap.Based on the Yushan south embankment project,we firstly analyze the charging technology of blasting compaction and measure the thickness of silt bulge,and then determine the width of the embankment gap according to the flow velocity.Finally,the embankment structure at the gap is formed by setting a temporary dam and blasting several times to both sides of the dam.The drilling test results show that the quality of blasting compaction and bottom falling at the embankment gap is good,and the closure method can meet the requirements of the design section.

关 键 词：爆破挤淤 龙口宽度 沉降位移 深厚软土 施工技术 

分 类 号：U655.54[交通运输工程—港口、海岸及近海工程]