不同赋存环境下灰岩三轴压缩试验及本构模型研究

以峨眉山二叠系茅口组灰岩为研究对象,对灰岩进行天然状态与饱和状态的三轴压缩试验,探究灰岩在不同赋存环境下的力学特性。根据试验结果建立灰岩天然状态与饱和状态的本构模型。通过分析天然状态与饱和状态灰岩试验结果的相互关系,得出灰岩在不同赋存环境下本构方程之间的关系,从而可以根据灰岩天然状态本构方程推导出饱和状态下的本构方程。根据试验建立了灰岩本构模型,并确定了相关的物理力学参数,可为类似的边坡稳定性研究提供重要的参考。

STUDY ON TRIXIAL TESTS OF LIMESTONE UNDER DIFFERENT CONDITIONS AND ITS CONSTITUTIVE MODEL

In order to study the mechanics characteristics of it, we conduct triaxial tests on Permian limestone which we get from Emei Mountain under the natural state and saturated state. On the basis of test results, we establish constitutive model of limestone, and we get the relationship between the constitutive model of natural limestone and saturated limestone. The constitutive model of saturated limestone can be derived from the constitutive model of natural limestone when we know the relationship between them. The constitutive model and the mechanics parameter are important to study similar slopes.