| 基于黏弹性本构性能的隧道围岩变形预测研究 |
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| 引用本文： | 俞文生,平洋.基于黏弹性本构性能的隧道围岩变形预测研究[J].岩土力学,2014,35(Z1):35-41. |
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| 作者姓名： | 俞文生 平洋 |
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| 作者单位： | 1. 长沙理工大学，道路结构与材料交通行业重点实验室，长沙 410004；2. 江西省高速公路投资集团有限责任公司，南昌 330025； 3. 山东大学岩土与结构工程中心，山东 济南 250061 |
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| 基金项目： | 国家重点基础研究发展计划(973)项目资助(No.2010CB732002)；国家自然科学基金面上项目资助(No.51179098)；教育部高等学校博士学科点博导类专项科研基金资助(No.20120131110031)；新世纪人才支持计划资助(No.NCET-12-2009)。 |
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| 摘 要： | 针对Ⅲ、Ⅳ级围岩,以江西高速公路隧道为背景,采用弹-黏塑性有限单元法分析预测不同类别隧道围岩变形。选取现场Ⅲ、Ⅳ级围岩进行室内剪切流变试验,分析得到Ⅲ、Ⅳ类岩样流变试验曲线与广义Kelvin模型的流变曲线吻合较好。基于广义Kelvin模型,推导出黏弹性模型复杂应力状态下的应力-应变关系。采用施工过程的黏弹性动态反分析法计算围岩参数,结合反演参数对预测隧道围岩变形进行预测分析。研究成果已应用于实际隧道工程中,指导、修正设计和施工参数,可为安全施工提供合理依据。
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| 关 键 词： | 黏弹性 围岩 剪切流变 反分析 变形 预测 |
| 收稿时间： | 2013-07-27 |
Research on deformation forecasting of tunnel surrounding rock based on viscoelastic constitutive behavior |
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| YU Wen-sheng
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PING Yang.Research on deformation forecasting of tunnel surrounding rock based on viscoelastic constitutive behavior[J].Rock and Soil Mechanics,2014,35(Z1):35-41. |
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| Authors: | YU Wen-sheng PING Yang |
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| Affiliation: | 1. Changsha University of Science, Key Laboratory of Road Structure & Material, Ministry of Transport of PRC, Changsha 410004, China; 2. Jiangxi Provincial Highway Investment Group Co., Ltd, Nanchang, 330025, China; 3. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China |
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| Abstract: | For Ⅲ, Ⅳ grade rocks, the different deformation types of tunnel surrounding rocks are analyzed and forecasted using the elasto-viscoplastic finite element method based on Jiangxi highway tunnel. First, the Ⅲ, Ⅳ grade rocks are selected, to carry out indoor shear rheological tests and analyze generalized Kelvin rheological test curve and find the flow curves agree well with the model for Ⅲ, Ⅳ grades rock samples. Based on the generalized Kelvin model, viscoelastic model is derived under the stress - strain relationship of complex stress state. Finally, the dynamic viscoelastic back analysis method of the construction process is used to calculate rock parameters, combined with inversion parameters for prediction analysis of tunnel surrounding rock deformation. The research results are applied to the actual tunnel construction to guide and revise design and construction parameters, so as to provide a reasonable basis for safe construction. |
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| Keywords: | viscoelasticity surrounding rock shear rheology back analysis deformation forecast |
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