基于胶凝堆石料的抗压、抗折和大三轴强度试验,对胶凝堆石料的基本力学特性进行了系统研究,得出试件破坏情况下的应力强度,通过拟合破坏强度和围压的关系式,推导出胶凝掺量为60kg/m3的胶凝堆石料的破坏准则;进一步拟合破坏强度、围压和胶凝掺量的关系式,推导出胶凝掺量为变量的胶凝堆石料的破坏准则。验证结果表明,所推导的胶凝堆石料破坏准则合理可靠,具有良好的通用性。
Based on compression tests, tension tests, and large scale three-axis tests on cemented sand and gravel(CSG) materials, the basic mechanical properties of CSG materials were systematically studied and the stress intensity of CSG was obtained during the CSG failure process. The correlativity between the failure strength of CSG materials and the ambient pressure was analyzed. According to the correlativity, the failure criterion of CSG materials with a cement proportion of 60 kg/m3 was established. The failure criterion of CSG materials with different cement proportions was established by fitting data of the failure strengths of CSG materials, the ambient pressures, and the cement proportions. The results show that the failure criterions of CSG materials have good performance, and show better support ability for similar applications development.