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GST-80型高压大三轴试验机由我院科研所研制,已投入应用。现将该机的技术参数、性能和用途作一简要介绍。本设备轴向最大荷载为3000kN,采用3000及1000kN两级防水传感器,可消除轴向加压活塞与压力室间的摩擦对成果的影响。采用单板机控制伺服阀匀速加轴向荷载,以感应同步尺作为速率反馈元件,精度达±0.001mm,可无级调速,并可手动和自动控制。围压由WY150-ⅡB电气液稳压器和YA1-2油水分离装置组成。σ_3及σ_2均设计为8000kPa,实际试压时达到12000kPa。稳压器在不中断电源的情况下,可恒压半年以上。高压大三轴试样尺寸有ψ300×
GST-80 high pressure large triaxial testing machine developed by our institute has been put into application. Now the machine’s technical parameters, performance and purpose for a brief introduction. The device axial maximum load of 3000kN, with 3000 and 1000kN two waterproof sensors, axial pressure to eliminate the friction between the pressure chamber and the impact on the results. Using single-board machine servo valve uniform plus axial load to sense synchronous feet as the rate of feedback components, accuracy of ± 0.001mm, stepless speed regulation, and manual and automatic control. The confining pressure consists of WY150-ⅡB electric liquid regulator and YA1-2 oil-water separator. σ_3 and σ_2 are designed to 8000kPa, the actual pressure test to reach 12000kPa. Voltage regulator without interruption in the case of power can be more than six months. High pressure large triaxial specimen size ψ300 ×