Study on the Nonlinear Dynamic Characteristic of Cone Penetrate Test Curve

摘要：

Soil on the surface of the earth is the remnants of weathered rock and strata with layer structure appear a time series feature. Static Cone Penetrate Test (CPT) is an exploration technology which can obtain the physical indices of strata accurately. Study shows that specific penetration resistances (Ps values) of soil vary with the buried depth of strata and the curves of Ps values have fractal characteristics. In this paper, we adopted nonlinear dynamic theory to analyze the chaos and multi-fractal properties of these curves. At the same time, we also discussed the Hurst exponents of CPT data sets. The results suggest that chaos characteristics of the test data are not clear, however the multi-fractal spectrum of each CPT curve can identify nonhomogeneity degree of soil, also it can distinguish the difference of sedimentary environments. Furthermore, rescaled range analysis indicates that the soil layers deposited later had long range dependence on those deposited early.

关键词： Core penetrate test surrogate data method multi-fractal rescaled range analysis small data sets method.

作者: Jiangdong Cai Daoming Zhang Zhenquan Jiang

作者单位: Huaiyin Institute of Technology, Huaian, 223001, China;China University of Mining and Technology Xuz China University of Mining and Technology Xuzhou, 221008, China

会议类型: 国际会议

会议名称: The 9th International Conference for Young Computer Scientists(第九届国际青年计算机大会)

会议地点: 安徽黄山

会议语种:英文

页码: 2830-2834

在线出版日期: 2008-11-18（万方平台首次上网日期，不代表论文的发表时间）