Abstract：How to obtain reasonable shear strength parameters of structural planes is one of the important topics in rock mechanics. Direct shear test is widely used to determine the shear strength parameters of rock joints. Sample preparation errors have great effects on shear strength obtained from the test. Great deviation between test results and true values will be generated unless the test results are amended. However，this kind of preparation errors can not be avoided under the current situation. So，it is significant to study the test results influenced by sample preparation errors. Normal and shear stresses correction formulae are deduced in this paper. In addition，the influence of parameters a and b on test results is also interpreted. Quantitative analysis shows that test results are sensitive to climbing angle a，while b has little effect on the test results，which is so tiny that it could be ignored. Two methods are put forward to amend the results，and an instance is also cited.
邹宗兴，唐辉明，刘晓，雍睿，倪卫达. 制样误差对结构面直剪试验结果影响定量研究[J]. 岩石力学与工程学报, 2010, 29(08): 1664-1669.
ZOU Zongxing，TANG Huiming，LIU Xiao，YONG Rui，NI Weida. QUANTITATIVE STUDY OF STRUCTURAL PLANE DIRECT SHEAR TEST RESULTS INFLUENCED BY SAMPLE PREPARATION ERRORS. , 2010, 29(08): 1664-1669.
