Error analysis in direct shear rock-mass structural tests
Abstract：Experimental data, some reasonable assumptions, and the least squares theory were used to study the variations in stress and strength parameters of rock under shear. The results show that： With the decrease in the shear area the normal and shear stresses of each rock sam- ple increase in the same proportion affecting the strength parameters~ In the example men- tioned a linear relationship between changes in the shear area and shear displacement was ob- tained~ In the area of lowest vertical pressure the effect is greater than it is at the highest verti- cal pressure for equal shear displacement. The impact of decreasing shear area on cohesion is greater than the impact on internal friction angle. The internal friction angle remains essential- ly unchanged. The results from a practical example indicate that the relative error in the inter- nal friction angle is O. 72% while the relative error in the cohesion is 4 14~
Keywords：rock mass structural planedirect shear testsshear areaerror analysisleastsquares
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)