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由中国科学院武汉岩土力学研究所许东俊副研究员主持研制的RT3型岩石高压真三轴仪最近研制成功,于1989年11月在武汉通过了专家鉴定。RT3型岩石高压真三轴仪由三轴压力室、轴向(σ_1)和横向(σ_2)加载系统、三向增压器系统、应力应变测试系统和操作台等部分组成。采用5×5×10cm的长方体试件,可施加最大主应力σ_1最高达800MPa,中间主应力σ_2达200MPa、最小主应力σ_3达200MPa。该设备可以独立地控制和改变三个主应力,并能测定三个主应力方向上的应变和声波传播参数,从而可以模拟工程岩体和地壳内部的任何应力状态和应力途径,为岩石力学基础理论、工程岩体稳定性和地震前兆特性等研究提供了新的实验手段。
The RT3 rock true-voltage triaxial apparatus developed by the researcher of Wuhan Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, was recently successfully developed and passed the expert appraisal in Wuhan in November 1989. RT3 type rock triaxial apparatus is composed of three-axis pressure chamber, axial (σ_1) and transverse (σ_2) loading system, three-way supercharger system, stress strain test system and operating console. Using a 5×5×10 cm cuboid test piece, the maximum principal stress σ_1 can be applied up to 800 MPa, the intermediate principal stress σ_2 up to 200 MPa, and the minimum principal stress σ_3 up to 200 MPa. The device can independently control and change the three principal stresses, and can determine the strain and acoustic wave propagation parameters in the three principal stress directions, so that it can simulate any stress state and stress pathway within the engineering rock mass and the crust, which is the basis of rock mechanics. Theoretical, engineering rock stability and earthquake precursor characteristics provide new experimental means.