DOI: 10.3724/SP.J.1249.2017.03259

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2017/34:3 PP.259-264

Error correction and evaluation for axis translation test technique

In order to improve the limitations of the application of axial translation technique in unsaturated soils, based on the mechanism of the experimental error of axis translation test technique, we propose a reasonable and simple calculation method to correct the error of the measurement of soil water characteristic curve (SWCC) and improve the accuracy of the application of axis translation technique. Combining with the tensiometer test results, we use the error evaluation theory to evaluate the results of the modified calculation method. We find that the modified water content can be obtained by the water content corresponding to each matric suction of SWCC, which is measured by axis translation technique, subtracting the water content of filling water. This greatly reduces the system error of axis translation test technique for SWCC. The effect of correction method is more obvious with the increase of matrix suction force. The method is more suitable for the correction of high matrix suction.

Key words:soil mechanics,axis translation test technique,unsaturated soil,tensiometer,water content,matrix suction,soil water characteristic curve,error evaluation

ReleaseDate:2017-06-16 14:08:43

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