Analysis Of Matching-Error In Centrifuge Experiment And Correction Technique

As the construction of large-scale and significant projects thrives, The construction of various geotechnical engineering and geotechnical engineering projects coming up, In the construction and research process, It is critical to accurate measure with miniature earth pressure in the soil. Therefore, based on the tests of calibration for water and calibration for soil in centrifugal field,20miniature earth pressure transducer has been conducted. The interaction between earth pressure transducer and soil has been investigated. This paper finally reaches such conclusions:(1) In the tests of calibration for water,The linearity of output data from miniature earth pressure is high, good reproducibility, and the hysteresis is obvious. So the static properties of miniature earth pressure is very well, and is suitable for research.(2) In the tests of calibration for soil in centrifugal field without loading, With the increase of the centrifugal acceleration, the output data of miniature earth pressure has slight increasing, there is only a dozen micro-strain changes. So the air medium dose not have impact on miniature earth pressure in centrifugal field.(3) In the tests of calibration for soil in centrifugal field with loading of soil, From the comparison between measured load and theoretical load, we can see that, the measured load is always less than the theoretical load. So, the modulus of miniature earth pressure is less than that of soil medium.(4) With the increasing of the centrifugal acceleration, The modulus of soil medium is constantly improving. And then, the matching-error has leading to dramatic changes and the calibration curve has leading to significant nonlinear response.(5) In different test, the soil medium with the same physical conditions and loading, has more relatively dense, the output data from miniature earth pressure would be more large.(6) Using the fitting analysis of the test data with mapping relational expression, to correct the test data, can significantly improve the accuracy of the miniature earth pressure transducer in high-modulus soil.