介绍一种新型双向激振电液伺服式动态三轴试验机,内置潜水式高精度围压补偿轴向负荷传感器,减少了摩擦力的影响,提高了测量精度。全数字电液伺服控制系统很好地解决了土工试验过程中控制方式切换冲击问题,配备的体变测量装置和电气修正补偿系统可以进行非饱和土试验。通过对不同直径试样试验中的电气自动补偿,解决了土工试验中各因素之间复杂的相互影响问题。 A new type of bidirectional exciting electro-hydraulic servo dynamic triaxial testing machine is introduced. The built-in submersible high-precision confining pressure compensation axial load sensor reduces the influence of friction and improves the measuring accuracy. All-digital electro-hydraulic servo control system can well solve the problem of switching impact and control mode in the process of geotechnical test. It is possible to carry out unsaturated soil test by using the body-changing measuring device and the electrical compensation system. Through the electrical self-compensation in the test of different diameter specimens, the complicated interaction between the various factors in the geotechnical test is solved.