| 考虑荷载修正的衬砌背后空洞对结构安全性影响分析 |
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| 引用本文： | 肖南润,丁祖德,刘正初,任志华.考虑荷载修正的衬砌背后空洞对结构安全性影响分析[J].工业安全与环保,2021,47(2):22-27. |
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| 作者姓名： | 肖南润 丁祖德 刘正初 任志华 |
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| 作者单位： | 昆明理工大学建筑工程学院 昆明 650500;中铁二院昆明勘察设计研究院有限责任公司 昆明 650200;云南省公路科学技术研究院 昆明 650513 |
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| 基金项目： | 云南省交通厅科技项目(2016A–01)。 |
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| 摘 要： | 以云南省某公路隧道为背景,建立考虑空洞影响下的荷载-结构修正计算模型,引入最小安全系数,对衬砌安全性进行评估。计算结果表明:背后存在空洞时,衬砌受力条件恶化,空洞处衬砌内力重分布明显,弯矩分布形态发生改变,导致衬砌安全性显著降低。拱顶或拱腰背后存在空洞时,衬砌最小安全系数均随空洞范围变大而降低。相同空洞范围下,相较于拱顶空洞,拱腰背后存在空洞时,衬砌最小安全系数更低。
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| 关 键 词： | 隧道 衬砌背后空洞 荷载修正 安全系数 |
Analysis of Influence of Cavity Behind Lining on Structural Safety Based on Load Correction |
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| XIAO Nanrun,DING Zude,LIU Zhengchu,REN Zhihua.Analysis of Influence of Cavity Behind Lining on Structural Safety Based on Load Correction[J].Industrial Safety and Dust Control,2021,47(2):22-27. |
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| Authors: | XIAO Nanrun DING Zude LIU Zhengchu REN Zhihua |
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| Institution: | (Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology ,Kunming 650500;不详) |
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| Abstract: | Based on a highway tunnel in Yunnan Province,a load structure correction calculation model considering the effect of cavity is established,and minimum safety factor is used as index to evaluate the safety of lining.The results show that,when there is a cavity behind the lining,the stress condition of the lining deteriorates,the internal force of the lining in the cavity is redistributed obviously,and the distribution of moment changes,which leads to the decrease of lining safety.When there are cavities on one side of arch crown or arch waist,the minimum safety factor of lining decreases with the increase of cavity range.Compared with the vault cavity,the safety factor of arch waist cavity is worse under the same cavity range. |
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| Keywords: | tunnel cavity behind lining load correction safety factors |
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