| 地下洞室应力分析中的荷载计算与初始地应力场 |
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| 引用本文： | 冯紫良.地下洞室应力分析中的荷载计算与初始地应力场[J].岩土工程学报,1991,13(3):36-42. |
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| 作者姓名： | 冯紫良 |
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| 作者单位： | 问济大学地下工程与建筑系 上海； |
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| 基金项目： | 国家自然科学基金No.5800357资助课题 |
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| 摘 要： | 本文运用虚功原理分析了地下洞室开挖施工前后地层应力状态的变化,探讨了地下洞室开挖效应的有限元分析中关于荷载计算的方法。文中先推导了同时考虑初始地应力和地层自重作用的荷载计算公式,指出了当前国内外广为使用的、单纯由初始地应力计算节点力释放荷载方法的问题所在。通过理论阐述与工程实例计算的比较分析,从理论和应用两方面说明了笔者所提出的确定开挖荷载方法的合理性。
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| 关 键 词： | 地下洞室 初始地应力场 荷载计算 应力分析 节点荷载 反转应力释放 释放荷载 开挖计算 开挖荷载 扰动位移 |
On the Determination of the Load Caused by Excavating Opening |
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| Feng Ziliang.On the Determination of the Load Caused by Excavating Opening[J].Chinese Journal of Geotechnical Engineering,1991,13(3):36-42. |
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| Authors: | Feng Ziliang |
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| Affiliation: | Tongji University Shanghai |
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| Abstract: | Observing the stress change of surrounding mass caused by excavating opening, the procedure to determine the load for simulating the movements of surrounding mass by Finite Element Method is discussed. Whilst load formula with effects of both the primary state of stress and the self-weight of surrounding rock mass is derived, the author points out that there is something wrong in the normal procedure in computing the excavation load by only considering the effect of primary state of stress. There are also sente calculation examples of practical engineering projects included, by which the necessity of using the procedure proposed In the paper in computing the excavation loads is then illustrated. |
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