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层状岩体中存在着定向结构面,导致其力学特性具有明显的各向异性。将层状岩体视为由基岩和定向结构面构成的一种宏观复合材料,以Drucker-Prager准则为基础,通过分别考虑结构面和基岩的力学性质,建立了层状岩体各向异性力学模型。该模型克服了常规层状岩体力学模型不能反映地层结构面特性及不能独立考虑基岩累进破坏特征的问题。在此基础上,提出了该模型的求解方法,基于ABAQUS二次开发,编制了计算程序,通过与经典理论进行对比,验证了该模型的有效性和实用性。将该模型应用于层状岩体地下工程的计算分析,所得结果可以较好反映层状岩体各向异性特性,且与工程实践基本相符。
There are directional structural planes in the layered rock mass, resulting in obvious anisotropy of the mechanical properties. Based on the Drucker-Prager criterion, the layered rock mass is regarded as a kind of macroscopic composite material composed of bedrock and directional structure. By considering the mechanical properties of the structural plane and bedrock respectively, Heterosexual mechanical model. This model overcomes the problem that the mechanical model of conventional stratigraphic rock mass can not reflect the characteristics of stratum structure surface and can not consider the progressive failure characteristics of bedrock independently. Based on this, the method of solving this model is put forward. Based on the secondary development of ABAQUS, a calculation program is compiled and compared with the classical theory to verify its validity and practicability. The model is applied to the calculation and analysis of stratigraphic rock mass underground engineering. The results obtained can well reflect the anisotropy of stratigraphic rock mass and are in good agreement with engineering practice.