广州港南沙港区深厚层软土原位测试方法  

In-situ testing methods for deep soft clay in Nansha Port area of Guangzhou Port

作　　者：刘自闯 唐群艳[1] LIU Zichuang;TANG Qunyan(CCCC FHDI Engineering Co.,Ltd.,Guangzhou 510290,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510290

出　　处：《水运工程》2024年第8期317-322,共6页Port & Waterway Engineering

摘　　要：广州南沙港区作为广州市重点发展的深水港,其港区内广泛分布深厚软土层,局部软土深度超过30 m。港区内软土层特征主要受两次大规模海侵、海退及珠江水系的影响。上层软土主要由淤泥组成,厚度约10~20 m,夹粉细砂薄层或条带状砂层;下层软土主要由淤泥质土组成,含有机质及腐木碎,厚度约4~8 m。软土参数是影响南沙港区工程建设的重要指标,采用原位测试不易受到影响,可准确呈现软土的力学性质。通过对比分析各种常用的原位测试方法,提出适用于南沙港区深厚软土层的原位测试方法。在工程实践中分别采用不同的原位测试方法获取工程参数,尤其采用不同规格的十字板板头进行十字板剪切试验,旨在为区域内同类软土勘察、设计及施工提供参考。As a key deep-water port for the development of Guangzhou,Nansha Port Area in Guangzhou has revealed the widespread distribution of deep soft clay in the area,with local soft soil depths exceeding 30 meters.The characteristics of soft clay in the area are mainly affected by two large-scale transgressions,regression and the Pearl River water system.The upper soft clay is mainly composed of silt,with a thickness of 10 to 20 meters,mixed with thin layers of fine sand or strip-shaped sandy layers.The lower soft soil is mainly composed of silty soil,containing organic matter and decomposed wood fragments,with a thickness of 4 to 8 meters.Soft clay parameters are important indicators that affect the construction of engineering in Nansha Port area.Using in situ test might be affected is less and can accurately present the mechanical properties of soft clay.By comparing and analyzing various commonly used in-situ test methods,suitable in-situ test methods for deep clay in Nansha Port area are proposed.In engineering practice,different in-situ test methods are used to obtain engineering parameters,especially for the vane shear test,aiming to provide reference for similar soft clay investigation,design,and construction in the region.

关 键 词：南沙港区 深厚层软土 静力触探试验 十字板剪切试验 十字板头规格 

分 类 号：TU192[建筑科学—建筑理论] U65[交通运输工程—港口、海岸及近海工程]