黄土土性的空间自相关性研究

<title>A STUDY ON THE SPATIAL SELF CORRELATION OF LOESS PARAMETERS

运用土层的随机场模型研究了绛帐、潼关和延安黄土主要物理力学指标沿深度的统计规律,计算出黄土土性的自相关距离,探讨了黄土土性的空间变异性,结果认为:黄土的物理力学指标沿深度均是统计非均匀的,在实际工程的设计中,如果把土层看成统计均匀,其土性参数的标准差会比实际情况大,从而会导致较大的误差。

<Abstrcat> This paper is to study the law of random variation of loess parameters with depth from Jiangzhang, Tongguan and Yanan in Shaanxi province, by probabilistic modeling of soil profiles, to compute a self-correlation distance of loess properties, and to describe the spatial variability of loess properties. The results show that the spatial variation of loess properties with depth is 'statistically nonhomogeneous'. In the design of geotechnical engineering, when the loess profile characteristics are treated as 'statistical homogeneity', the calculation errors will be obvious due to its standard deviations over the actual field values.