水下深层水泥搅拌法复合地基检测方法

水下深层水泥搅拌法是国内新近采用且日益发展的水下地基处理技术,目前对其检测方法缺乏系统研究。依托粤港澳大湾区在(拟)建工程项目,调研分析水下深层水泥搅拌法复合地基工程设计特点与上部结构类型。在此基础上,对钻孔取芯、振动取样、湿抓取样、静力触探、钻孔径向加压试验、平板载荷试验等潜在可行的水下深层水泥搅拌法复合地基检测方法进行系统性分析。结合工程实际,对上述检测方法进行了综合比较,并就工程应用中永久桩和试验桩复合地基检测方法的选择给出了建议。

Testing methods for underwater composite ground with deep cement mixing

The method of underwater deep cement mixing is a newly adopted and increasingly developed technique of underwater foundation treatment in China.Based on the marine projects being or to be constructed in Guangdong-Hong Kong-Macau Greater Bay,design characteristics of underwater composite ground with deep cement mixing,as well as the corresponding superstructures,were surveyed and analyzed.On that basis,systematic analysis was carried out on the potential testing methods corresponding to drilling core,vibration sampling,wet grab sampling,cone penetration test,borehole radial loading test and plate loading test.Finally,combined with engineering practice,comprehensive comparison was made with the above test methods,and suitable testing methods to be adopted were recommended for underwater composite ground with permanent DCM clusters and trial DCM clusters.