不同线性拟合方法对直剪试验结果影响的分析

The influence of different linear fitting methods on the results of direct shear tests

依据实际工程项目的直接剪切试验数据,分别采用最小二乘法、梯度降减法拟合试验数据的线性关系式,根据各自关系式确定抗剪强度指标C,φ值。同时,以实际试验数据为标准,分析采用不同方法拟合的线性关系式可靠性;以最小二乘法确定抗剪强度指标为参照值,比较采用其他方法确定抗剪强度指标与其之间的差异。

Ased on the direct shear test data of actual engineering projects,this paper uses the least square method,gradient reduction method to fit the linear relationship of the test data,and determines the shear strength index C,φValue.At the same time,based on actual test data,the reliability of linear relationships fitted using different methods is analyzed;Using the shear strength index determined by the least square method as a reference value,compare the differences between the shear strength indexes determined by other methods and their values.