Abstract: A study on pressure calibration of a triaxial testing apparatus with solid confining media is presented with temperature up to 625℃ and confining pressure up to 6.5kb. The solid confining media used were Pb,AgCl and Nacl. For room temperature, phase-transition materials, such as NH₄I, phenol, AgI, NH₄F and KNO₂ were used to establish the relationship between the pressure applied on the specimen and the nominal pressurre measured outside The vessel. The correction of confining pressure △σ_c changing inversly with temperature was determined quantitatively by the "temperatueeffect" tests. It is shown that the pressure transmitting behavior of NaCl is obviously improved above 200℃ and a semi-emperical expression for △σ_c was derived for NaCl as a function of temperature T(℃), i. e. △σ_c = (0.491 + 0.000650T) [2.325-0.455 (T-25)^0.217].

摘要： 本文对用于岩石力学性质研究的固体围压三轴实验装置的压力标定问题进行了研究。在分析各种影响因素的基础上,设计了压力标定的具体方法。在围压小于6.5kb、温度低于625℃的范围内对一现有装置进行了修正量的测定。这一结果提高了利用固体围压三轴实验装置进行岩石力学参数测定的精度。