基于孔压静力触探的海洋地层参数解译方法

Interpretation method for maine soil based on piezocone penetration test

传统的海洋工程勘察采用钻孔室内试验的方式,海洋勘探作业受到风浪流的影响,试样受到扰动较大,原位测试作为对土体扰动较少的试验方式受到越来越多的重视。孔压静力触探原位测试方法具有数据连续、作业快速、对土体扰动小等特点,在海洋工程中应用最为广泛。由于孔压静力触探无法直接获取土体参数,需要通过复杂的解译方法得到,该文旨在通过对孔压静力触探的解译方法进行总结分析,给出砂土不同物理及力学参数的解译方法,为海洋岩土工程设计提供可靠参数。

Traditionally,borehole sampling with laboratory test is adopted for offshore engineering geotechnical investigation.During the offshore exploration,the field work is affected by wind,wave and flow,while the soil samples are severely disturbed.The in-situ tests,which have less disturbances on soil samples,are become more and more popular.Piezocone penetration in-situ test is most widely used in offshore geotechnical investigation,which has the advantages of continuous data,fast operation and less disturbance of soil.As the soil parameters cannot be directly obtained by Piezocone penetration test(CPTU),complicated interpretation processes are required for different soil parameters.This paper aims to summarize the CPTU interpretation methods,and to give different interpretation methods for physical and mechanical parameters of sand,which can provide reliable parameters for offshore geotechnical design.