宁波淤泥质黏土土性参数相关距离研究

A Study on Correlation Distance of Soil Parameters of Ningbo Mucky Clay

土体的相关距离是应用随机场理论进行岩土工程可靠度分析的基础,也是表征土性参数空间变异性的重要参数。为确定宁波淤泥质黏土的竖向相关距离,以宁波轨道交通1号线樱花公园站为例,选取静力触探试验(CPT)数据作为样本,采用图形3σ法则对试验数据进行分析处理,并运用相关函数改进法对分析处理后的试验数据进行统计计算,得到宁波淤泥质黏土竖向相关距离代表值为0.38m。研究成果不仅为宁波地区的岩土工程可靠度分析奠定了基础,也为该地区的土性参数空间变异性研究提供了有价值的参数。

The correlation distance of soil is the fundamental base for the application of random filed theory to reliability analysis in geotechnical engineering,and also a very important parameter to characterize the spatial variability of soil indexes.To determine the vertical correlation distance of Ningbo mucky clay,the Sakura Park Station of Ningbo Rail Transit Line 1 is taken as an example and the cone penetration test(CPT)data samples are used.The test data are analyzed by using graphical three-sigma rule and the analysis results are calculated by using the improved correlation function.The regional representative vertical correlation distance of the mucky clay in Ningbo is 0.38 m.The result will lay a solid foundation for reliability analysis in geotechnical engineering in Ningbo,and also valuable for study of Spatial variability of soil parameters.