水力吹填砂土地基加固处理现场试验及方案优化

分析了绞吸式挖泥船水力吹填形成陆域后的地基处理方法,通过对吹填砂颗粒成分分析、地基试夯处理和静力触探检测的综合分析,针对不同使用功能区域分别采取振冲和强夯地基处理,经检测各项技术指标达到设计要求。根据调整和优化的加固处理方案顺利完成地基处理工作,为港区陆域后续基础设施的施工开展创造了条件,取得良好的经济效益。该工程的成功实施为类似吹填造地沙漠地基工程建设提供了有益的借鉴和经验。

Field test & optimization of soil improvement in reclamation area by cutter suction dredger

The paper analyses the method statements of the soil improvement in the reclamation area by the cutter suction dredger. According to the sand analysis, CPT and preliminary dynamic compaction, the combination method of vibro-flotation and dynamic compaction are carried out for different reclamation areas. CPT and in-situ density test are used to verify the densities of the structural fill and the degree of compaction for the first metre thick fill layer respectively after ground treatment. After ground treatment, not only the bearing capacity of the proposed structural fill is increased, but also ground settlement on these locations is limited. The successful implementation ofthis project provides instructive reference and valuable experience for similar engineering cases.