| 氯盐和冻融循环复合作用对深埋公路隧道安全性能的影响 |
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| 引用本文： | 尹蓉蓉,朱合华.氯盐和冻融循环复合作用对深埋公路隧道安全性能的影响[J].岩土力学,2009,30(Z2):323-327. |
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| 作者姓名： | 尹蓉蓉 朱合华 |
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| 作者单位： | 尹蓉蓉(同济大学,地下建筑与工程系,上海,200092;江苏科技大学,船舶与海洋工程学院,镇江,212003);朱合华(同济大学,地下建筑与工程系,上海,200092) |
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| 摘 要： | 对氯盐和冻融循环复合作用后Ⅳ级围岩中埋深为30 m的隧道,运用同济曙光软件建立荷载-结构法拉压弹簧模型进行分析计算,该荷载-结构模型在拱顶152°范围内设置拉弹簧,其余部位设置压弹簧,计算表明:随着环向裂缝宽度(钢筋锈蚀程度的增加)以及纵向裂缝深度的增加,隧道安全性能逐渐降低;衬砌具有相同钢筋锈蚀程度和纵向裂缝深度时,拱顶处病害比拱腰处病害对隧道安全性能的影响大;当环向裂缝宽度小于0.2 mm时,环向裂缝宽度的变化对隧道衬砌安全性能影响不大.
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| 关 键 词： | 深埋 公路隧道 氯盐 冻融循环 安全性能 |
| 收稿时间： | 2002-11-27 |
Influences of combined effect of chloride and freezing-thawing cycles on safty of deep buried highway tunnel |
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| YIN Rong-rong,ZHU He-hua.Influences of combined effect of chloride and freezing-thawing cycles on safty of deep buried highway tunnel[J].Rock and Soil Mechanics,2009,30(Z2):323-327. |
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| Authors: | YIN Rong-rong ZHU He-hua |
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| Institution: | 1.Department of Geotechnical Engineering,Tongji University, Shanghai 200092, China; 2.School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China |
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| Abstract: | Using GeoFBA, a load-structure method tensile-compressional model is established for analyzing and calculating the tunnel which is 30 m depth embedment in surrounding rock Ⅳ, and is eroded by combined effect of chloride and freezing and thawing cycles. The load-structure model is installed tensile spring in the range of 152° of the arch crown; and the left part is set by compressional spring. The calculation indicates that first of all, the tunnel safety falls down gradually with the increase of circumferential crack width (the corrosion degree of reinforcement) as well as longitudinal crack depth; furthermore, when lining suffers the same corrosion degree of reinforcement and the same depth of longitudinal crack, the problem occurs on the arch crown which would bring up bigger effect on the tunnel safety than that occurs in the haunch; in addition, the change of circumferential crack width, which is smaller than 0.2 mm, would make less influence on the tunnel lining safety. |
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| Keywords: | deep buried highway tunnel chloride freezing and thawing cycles safety performance |
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