Kriging法在大区域场地砂土液化范围判别中的应用研究

 简要介绍Kriging插值法的基本原理。基于随机场概念，将Kriging法应用于南水北调穿黄工程北岸漫滩明渠地基，依据分布孔位的标准贯入实验成果对明渠全线地基的标贯击数和液化部位进行统计推断，在此基础上得以对全线的液化深度和液化范围进行分析评价。研究结果表明，将Kriging法用于岩土工程地质特征的统计推断，有助于揭示勘探孔以外的地层信息，对于大区域场地砂土液化范围的判别是一个较好
的手段。

Application Study of Kriging Method in Identification of Liquefaction Locality for Large Sandy Ground

The middle route of the South to North Water Transfer Project(SNWTP) is being constructed in China. The canal of SNWTP will traverse across the Yellow River. At the north floodplain of the river the canal will be established on a sandy ground for about 6 500 m in length. To estimate the liquefaction possibility of the foundation under earthquake, a standard penetration test has been carried out. Sixteen tested holes were sparsely distributed in the length of 6 500 m, so much difficulty may exist in judging the possible liquefaction range for the whole foundation. In this situation, interpolation computation between tested holes should be employed. The Krigings interpolation method, which has been widely applied in geography, was introduced and adopted in this foundation. Based on the interpolation, the liquefaction depth and span of the canal foundation were analyzed and discussed. The research effort in this paper shows a bright application prospects of the Krigings interpolation method in geotechnical investigation.