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中文摘要：
为了解某高挡墙在运行过程中的安全状况,对其典型断面位移监测资料进行了R/S分析,计算了其Hurst指数、相关系数与分形维数,计算结果表明：位移时间序列的H值均较大,具备着趋势性与随机性双重特征。其中,水平位移的H值接近于1,趋势性较强,垂直位移的H值较接近于0.5,随机性较强;挡墙位移时间序列的分形维数均大于1,说明挡墙位移发展过程中存在着非线性;挡墙右岸出现的降雨入渗导致了水平位移时间序列的H值降低,分形维数升高,结构的非线性特征变得显著,系统更为复杂。
英文摘要：
In order to understand the security situation of a high retaining wall in operation, the displacement time series of typical sections are analyzed by R/S method for its nonlinear features including Hurst index, correlation coefficient and fractal dimension calculation. The results show that： （a） the H values of displacement time series are larger and they have double features of tendency and randomness, the H values of horizontal displacement are close to 1 which means strong tendency, and the H values of vertical displacement are close to 0.5 which means strong randomness; （b） the fractal dimension of retaining wall displacement time series are all a little bigger than 1, indicating that the displacement process exists non-linear; and （c） the rainfall infiltration occurred in the right bank causes a reduction of H value and an increase of fractal dimension, which means the nonlinear characteristics of structure being significant and the system being more complex.
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