| 考虑岩体扩容和塑性软化的软岩巷道变形解析 |
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| 引用本文： | 姚国圣,李镜培,谷拴成.考虑岩体扩容和塑性软化的软岩巷道变形解析[J].岩土力学,2009,30(2):463-467. |
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| 作者姓名： | 姚国圣 李镜培 谷拴成 |
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| 作者单位： | 1. 同济大学 岩土及地下工程教育部重点实验室，上海 200092； 2. 同济大学 地下建筑与工程系，上海 200092； 3. 西安科技大学 建筑与土木工程学院，西安 710054 |
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| 摘 要： | 考虑岩体的扩容和塑性软化特性，引进扩容梯度和软化模量的概念，推导出均匀介质中软岩巷道应力和变形的理论解答。与其他理论模型进行比较，验证了理论模型的正确性。通过算例分析了岩体的扩容梯度和软化模量对围岩塑性区、破裂区半径以及围岩变形和压力的影响。分析结果表明，考虑岩体的扩容和塑性软化特性使得分析更加准确，研究成果对软岩巷道支护设计与施工具有一定指导意义。
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| 关 键 词： | 软岩 扩容 塑性软化 变形 解析解 |
| 收稿时间： | 2007-05-31 |
Analytic solution to deformation of soft rock tunnel considering dilatancy and plastic softening of rock mass |
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| YAO Guo-sheng,LI Jing-pei,GU Shuan-cheng.Analytic solution to deformation of soft rock tunnel considering dilatancy and plastic softening of rock mass[J].Rock and Soil Mechanics,2009,30(2):463-467. |
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| Authors: | YAO Guo-sheng LI Jing-pei GU Shuan-cheng |
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| Institution: | 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 3. College of Architecture and Civil Engineering, Xi’an University of Science and Technology , Xi’an 710054, China |
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| Abstract: | By taking the dilatancy and plastic softening of rock mass into account and introducing the concept of the dilatancy gradient and softening modulus, the new analytic solution of the stress and deformation of the soft rock tunnel are educed. The rationality and feasibility of the presented model are verified with the results from other published theoretical models. The influences of the dilatancy gradient and softening modulus on the deformation and pressure of the surrounding rock are analyzed by a case study. The results show the analysis is more rigorous than before by considering the dilatancy and plastic softening of rock mass.The conclusion obtained has some significance in guiding the supporting design and construction of the soft rock tunnel. |
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| Keywords: | soft rock dilatancy plastic softening deformation analytic solution |
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