基于各向异性本构模型的隧道围岩稳定性研究  

Stability Analysis of Surrounding Rock of Tunnel Based on Anisotropic Constitutive Model

作　　者：贾善坡[1] 罗金泽[1] 吴渤 伍国军[3] 

机构地区：[1]长江大学城市建设学院,湖北荆州434023 [2]中国核工业中原建设有限公司,北京100037 [3]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《水电能源科学》2013年第9期111-114,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(41102182);湖北省自然科学基金资助项目(2011CDB008);中国石油科技创新基金资助项目(2011D-5006-0603)

摘　　要：在地下工程设计中普遍将岩体近似为各向同性体并不能反映裂隙组的分布对岩体各向异性的影响,为此将岩体视为由基岩和定向裂隙面构成的一种宏观复合材料,基于Drucker-Prager准则,在考虑结构面的几何特性和力学性质基础上建立岩体各向异性本构模型,据此模拟了某隧道开挖施工过程。结果表明,各向异性本构模型可较好地模拟隧道围岩各向异性及其破坏特征,与工程实际相符。In present underground engineering design, rock mass is simply treated as isotropic material and it cannot reflect the impact of fracture distribution on rock mass anisotropy. So, the rock mass is considered as a macroscopic com- posite material which is composed of bedrock and directional fracture plane. Based on the Drucker-Prager criterion, aniso- tropic constitutive model of rock mass is established by considering the physical and mechanical characteristics of structur al plane. And then the proposed model is used to simulate the construction process of tunnel excavation. The results show that the proposed model can be used to better simulate the anisotropic characteristics of the surrounding rock and failure characteristics, which is in accordance with engineering practice.

关 键 词：围岩稳定性 岩体本构模型 裂隙组 各向异性 

分 类 号：TU452[建筑科学—岩土工程]