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介绍孔压静力触探(CPTU)原理,详细叙述了利用CPTU试验资料计算软土固结系数的方法和步骤。结合港珠澳大桥岛隧工程的CPTU试验进行了实例计算,结果表明:孔隙水压力静力触探测试求出的固结系数比室内固结试验所求固结系数大1~2个数量级;针对两种固结系数进行了大量统计对比研究,发现两者之间存在很好的线性相关关系。
The principle of CPTU is introduced. The method and procedure for calculating consolidation coefficient of soft soil by CPTU test data are described in detail. Combined with the CPTU test of Hong Kong - Zhuhai - Macao Bridge project, the calculation results show that the consolidation coefficient obtained by the static test of pore water pressure is 1 ~ 2 orders of magnitude larger than the consolidation coefficient determined by the indoor consolidation test. A large number of statistical contrast studies on the two kinds of consolidation coefficients show that there is a good linear correlation between the two.