工程地质学报2017，Vol.25Issue(6)：1424-1429,6.DOI:10.13544/j.cnki.jeg.2017.06.004
空间递推平均法在估计土性指标自相关距离中的应用
APPLICATION OF SPATIAL AVERAGE METHOD TO ESTIMATION OF SCALE OF FLUCTUATION OF SOIL INDEXES
摘要
Abstract
Like most other soil layers,spatial variability of soil indexes also exists in the clayey layers.Such characteristic mainly results from geologic processes like deposition,diagenesis,et al.Determination of the scale of fluctuation is the key to know spatial variability of soil indexes.Therefore,this paper aims to analyze spatial variability of indexes of clayey soil in Nanjiang Port in Tianjin.It summarizes the spatial average method and its improved method at first.Combining geology data,the improved spatial average method is employed to analyze the scale of fluctuation of a typical soil layer in Tianjin Port in the vertical direction.The regional representative values are obtained,which are of high value on risk assessment in geotechnical engineering and determination of exploratory engineering intervals.In addition,the Bayesian inference is also discussed to revise the scale of fluctuation.Its results indicate that the Bayesian inference is much more reasonable.Furthermore,the scale of fluctuation of the mud and silt clay layer can be guidance for selection of sampling locations,and also valuable to reliability analysis of geotechnical engineering.关键词
空间变异性/自相关距离/空间递推平均法/贝叶斯原理Key words
Spatial variability/Scale of fluctuation/Spatial average method/Bayesian inference分类
建筑与水利引用本文复制引用
郭林坪,许文祥,杨爱武,刘晓强..空间递推平均法在估计土性指标自相关距离中的应用[J].工程地质学报,2017,25(6):1424-1429,6.基金项目
港口岩土工程技术交通行业重点实验室基金(14-50),天津市自然科学基金(15JCQNJC07900,15JCZDJC40600)资助. （14-50）
