岩土工程学报Issue(7)：1278-1287,10.DOI:10.11779/CJGE201507014
基于随机场理论的江苏海相黏土空间变异性评价研究
Assessment of spatial variability of Jiangsu marine clay based on random field theory
摘要
Abstract
Analysis of soil spatial variability is the basis for the reliability study of geotechnical engineering. Based on the CPTU data, the random field model parameters of Jiangsu marine clay are determined employing the random field theory, and the spatial variability is also discussed. Given the relatively high sampling frequency of the cone tip resistance in the vertical direction, the cone tip resistance data is processed by the linear trend removal method to get fluctuation components. The coefficient of autocorrelation is estimated by using five autocorrelation models, and the stationarity of fluctuation components is verified by the modified Bartlett’s statistics. The optimum vertical scale of fluctuation is selected from the five verified autocorrelation functions. The vertical coefficient of variation is assessed by the fluctuation components and trend removal functions. In light of lack of CPTU data in the horizontal direction, the horizontal scale of fluctuation is generated using the Vanmarcke’s expeditive method. The horizontal coefficient of variation is expressed as the total coefficient of variation. The study shows that Jiangsu marine clay exhibits greater variability than the clay previously reported in other sites in both the vertical and horizontal directions.关键词
空间变异性/海相黏土/孔压静力触探/随机场理论Key words
spatial variability/marine clay/piezocone penetration test/random field theory分类
建筑与水利引用本文复制引用
林军,蔡国军,邹海峰,刘松玉..基于随机场理论的江苏海相黏土空间变异性评价研究[J].岩土工程学报,2015,(7):1278-1287,10.基金项目
国家自然科学基金项目（41202203）；国家科技支撑计划项目（2012BAJ01B02）；全国优秀博士学位论文作者专项资金项目（201353）；江苏省杰出青年基金项目（BK20140027）；教育部新世纪优秀人才支持计划（NCET-13-0118）；中央高校基本科研业务费 （）
