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本文着重讨论大理岩在三向应力状态下压缩变形特性试验研究.探讨了不同的加荷路径对应力-应变关系、强度及破坏机制等的影响.进行了恒侧压、反复加压、等比加压、应力常量,卸荷等试验研究,此外还进行了无侧向应变及静水压等试验.该试验采用了我所自制的 CBS-2型数字显示位移测量仪进行测量,探头直接固定在高压筒体内岩样上下垫块之间,可以测出岩样破裂后的变形,克服了过去采用电阻片量程不够的问题.本试验得出了不同加荷路径的应力-应变关系曲线,提出了一些看法.
This article focuses on the experimental study of compressive deformation characteristics of marble under three-dimensional stress conditions. The effects of different loading paths on the stress-strain relationship, strength and failure mechanism are discussed. Constant pressure, repeated pressure, and equal pressure are performed. Tests on pressurization, stress constants, unloading, etc. In addition, tests were carried out without lateral strain and hydrostatic pressure. This test was carried out using the CBS-2 digital display displacement measuring instrument made by ourselves and measured directly by the probe. Between the upper and lower pads of the rock samples in the high pressure cylinder, the deformation of the rock sample after fracture can be measured, which overcomes the problem of insufficient measurement range of the resistance plate in the past. This experiment has obtained the stress-strain curve of different loading paths. Some views.