模袋水泥土的界面粗糙度和抗剪强度的分形估算

Fractal Estimation on Shear Strength and Section Roughness of Sacked Cemented-soil

基于分形几何理论,运用均方根坡度角法(ARMSS)对模袋水泥土的截面轮廓线进行了分形指标(β、A、D)的估算,测算出截面轮廓线的粗糙度系数JRC,并在此基础上结合JRC-JCS模型估算出模袋水泥土界面的抗剪强度。研究表明:ARMSS法能方便、快捷地推算出该类截面轮廓线的JRC,摆脱传统的带主观性和随意性的JRC判定方法。由此得到的界面抗剪强度与直剪试验所得抗剪强度十分接近,能为今后的实际工程施工和设计提供依据。

Based on the fractal geometry theory, the fractal parameters（β,A,D） of the sacked cemented-soil were measured and calculated by using the root-mean-square slope angle method （ARMSS）. The joint roughness coefficient （JRC） was calculated. In addition, the shear strength was estimated by using the Barton＇s JRC-JCS model. Results showed that the ARMSS method was convenient to calculate JRC and its shear strength value was similar with the shear strength value by direct shear test, which was provided as the reference for the engineering design and construction.