盐田港东作业区软土特性及地基处理方案比选  

Soft soil characteristics and comparison of foundation treatment schemes in east operation area of Yantian Port

作　　者：赵树光 杨秋芳 ZHAO Shuguang;YANG Qiufang(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》2025年第3期145-151,181,共8页Port & Waterway Engineering

基　　金：国家重点研发计划项目(2023YFB2604200)。

摘　　要：针对大型填海造地项目软土成因、分布复杂,其物理力学性质对地基处理方案影响重大的难点。以盐田港东作业区为例,对项目大量地基处理前后的原位测试、土工试验资料、深圳地区经验进行研究和技术分析,总结该区域的软土层的物理力学和分布特征。结果表明:堆载预压处理后淤泥质软土层分布很少,前期的淤泥质土已变为粉质黏土,力学性质明显改善。针对部分软土缺乏剪切指标的问题,提出参考地区经验和原位测试值等建议值。根据不同地基处理方案的比选,提出吹填淤泥预压加固中应注意断带等问题,得出预压处理后可采用强夯法或强夯置换法等处理方案,地基加固效果良好。可为类似填海造地工程物理力学参数的确定和地基处理方案的选择提供指导意见。The complex formation and distribution of soft soil in large-scale land reclamation projects pose significant challenges in terms of its physical and mechanical properties,which have a significant impact on the foundation treatment plan.Taking the east operation area of Yantian Port as an example,a large amount of in-situ testing,geotechnical test data before and after foundation treatment,as well as experience in the Shenzhen area,are studied and technically analyzed.The physical mechanics and distribution characteristics of the soft soil layer in the area are summarized.The results show that after preloading treatment,the distribution of the silty soft soil layer is very small,and the early silty soil has become silty clay,with significantly improved mechanical properties.In response to the lack of shear indicators in some soft soils,recommendations are proposed based on regional experience and in-situ test values.Based on the comparative analysis of different foundation treatment schemes,it is proposed that attention should be paid to issues such as broken zones in the preloading reinforcement of hydraulic fill silt.It is concluded that after preloading treatment,dynamic compaction method or dynamic compaction replacement method can be used as treatment schemes,and the foundation reinforcement effect is good.It can provide guidance for determining the physical and mechanical parameters of similar land reclamation projects and selecting foundation treatment plans.

关 键 词：软土 淤泥 物理力学特征 地基处理 

分 类 号：U655.544[交通运输工程—港口、海岸及近海工程]