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针对岩体工程中的弱夹层对工程结构的整体稳定性和支护结构安全性有不利影响的问题,认为结构强度和破坏形式与围岩和夹层各自的力学特性及二者间结合界面的应力状态有关.假设含弱夹层岩体为横观各向同性弹性复合岩体(不针对具体岩石种类),按照叠加原理,推导出夹层水平时复合岩体界面处应力表达式,并通过数值仿真对层状岩体应力分布进行定性验证,在此基础上进行强度分析,并给出含弱夹层岩体的破坏形式和破坏机理,对任意两种变形能力有差别的岩石组成的复合层状岩体,尤其弾脆性岩体适用.
Aiming at the problem that the weak interlayer in rock mass engineering has an adverse effect on the overall stability of the engineering structure and the safety of the supporting structure, it is considered that the structural strength and failure mode are related to the mechanical properties of the surrounding rock and interlayer and the stress of the interface between the two State is assumed.On the assumption that the weakly intercalated rock mass is a transversely isotropic elastic composite rock mass (not specific to specific rock types), the stress expression at the interface of the composite rock mass at the interlayer level is deduced according to the superposition principle, The rock mass stress distribution is qualitatively verified. Based on this, the strength analysis is carried out, and the failure form and failure mechanism of the rock mass with weak intercalation are given. For any two kinds of composite layered rock mass with different deformability,弾 brittle rock for.