Abstract: In this study,bender elements measuring system was developed on an existing dynamic triaxial apparatus.The measuring technique of determining shear wave velocity in the saturated specimen and its principle are presented.Based on the new measuring system,the elastic shear modulus of the reconstituted specimens are controlled by prestraining to match those in situ with the intention to partly restore the original fabric.Undrained cyclic strain-controlled tests are conducted to analyze the liquefaction potential of the studied soil.The range and mean value of critical shear strain are presented based on the test results,which provides a basis for the evaluation of liquefaction potential.Comparison is also made between the results of the conventional reconstituted specimens and the improved specimens.