爆破挤淤堤未爆穿软基中砂夹层的补救措施  

Blasting compaction embankment remedy for no blast through sand layer in silt foundation

作　　者：刘阳 刘家才 许增会 

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》2017年第6期203-207,共5页Port & Waterway Engineering

摘　　要：针对大小鱼山南防波堤工程爆破挤淤地基处理时未能爆穿深厚软基中砂夹层的问题,进行了补救措施的研究。结合施工工艺,分析未爆穿砂夹层的原因,采用简化毕肖普法复核未爆穿段海堤的稳定性,提出补救措施进行稳定计算并对比分析。结果表明采取对海堤内侧增加侧爆、外侧加厚加宽反压平台的措施,可有效提高海堤整体稳定。为含砂夹层复杂软基地基处理的设计与施工提供了重要的参考。Embankment remedy is researched to solve the problem of no blast through sand layer in thick silt foundation happened in Da-xiao-yushan south embankment project.According to construction technology, the reasons for no blast through the sand layer are simply analyzed.Then simple Bishop method is used to check stability of the problem embankment.Remedy is proposed to comparatively analyze stability of the bad blasting compaction and the ideal blasting compaction. Results show that the stability of embankment can be improved if increasing landside blast, and foundation at the same time thickening and widening anti-slide loading berm.It provides an important reference for treatment design and construction in such complex silt foundation with sand layer.

关 键 词：爆破挤淤 深厚软基 砂夹层 侧爆 反压平台 

分 类 号：U656.2[交通运输工程—港口、海岸及近海工程]