爆破挤淤堤未爆穿软基中砂夹层的补救措施

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。

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

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 at the same time thickening and widening anti-slide loading berm.It provides an important reference for foundation treatment design and construction in such complex silt foundation with sand layer.