含层间错动带岩体的破坏模式及其剪切特性研究方法探讨  

On failure mode and shear behavior of rock mass with interlayer staggered zone

作　　者：徐鼎平[1] 冯夏庭[1] 崔玉军[1,2] 江权[1] 周辉[1] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071 [2]法国国立路桥大学

出　　处：《岩土力学》2012年第1期129-136,共8页Rock and Soil Mechanics

基　　金：国家重点基础研究发展规划(973)项目(No.2010CB732006);中国科学院;国家外国专家局创新团队国际合作伙伴计划项目(No.KZCX2-YW-T12);国家自然科学基金资助项目(No.40902090)

摘　　要：层间错动带存在的普遍性,给世界上许多工程带来了岩体稳定性问题和地质灾害。通过对因层间错动带导致工程岩体结构变形失效或破坏的实例进行归纳总结,采用岩体结构控制理论的观点将含层间错动带的岩体的破坏模式分为拉裂破坏、掉块和层间剪切滑移破坏3大类。以此为基础,提出剪切力学模型是层间错动带力学模型研究的重点。对层间错动带剪切力学特性的现有试验方法和建模理论进行评述,并根据现有的研究基础,提出屈服面蠕变模型是当前层间错动带剪切蠕变模型的较好选择。Because of existence worldwide of interlayer staggered zone, there have been many engineering rock mass stability problems and geological disasters occurred over the world. In this paper, some cases of distortion failure or destruction of engineering rock mass structure induced by interlayer staggered zone are summarized. Rock mass structure controlling theory is adopted to categorize the failure modes of rock mass with staggered zone into tension crack failure, block-fall and interfacial shear slip failure. After that, it is shown that shear strength model is the main point when modeling for the mechanical behavior of interlayer staggered zone. A deep review of the existing test methods and the modeling theory for its shear behavior shows that the elasto-viscoplastic model is the fundamental constitutive model for describing the mechanical behavior of interlayer staggered zone.

关 键 词：层间错动带 破坏模式 剪切特性 弹-黏塑性模型 

分 类 号：TU443[建筑科学—岩土工程]