隧道衬砌厚度不足对衬砌结构承载力影响

发布时间：2018-01-20 00:03

本文关键词： 隧道衬砌厚度不足承载力安全　出处：《沈阳建筑大学学报(自然科学版)》2017年06期 　论文类型：期刊论文

【摘要】：目的对某城市隧道检测,探究隧道是否会因衬砌厚度不足或衬砌减薄而对结构安全及承载力造成影响.方法通过模拟实验,选取典型的衬砌断面为研究对象,用层次分析法衡量安全因素权重值,建立模型对不同程度的衬砌厚度不足情况进行承载力和变形分析.结果当实际衬砌与设计厚度比值从0.9降到0.5时,最大竖向变形值从18 mm增加到45 mm;当其比值小于0.7时,其承载力安全系数显著减小,结构安全系数降低;当比值大于0.7时,结构安全.结论衬砌厚度在不同工况下,结构承载力和安全性随着衬砌厚度与实际厚度的比值减小而减小.隧道衬砌厚度达不到设计要求会削弱结构的承载能力且影响其正常使用.
[Abstract]:Objective to investigate whether the tunnel will affect the safety and bearing capacity of a city tunnel due to insufficient lining thickness or thinning of lining. Methods typical lining section is selected as the research object through simulation experiments. The weight of safety factors is measured by AHP, and a model is established to analyze the bearing capacity and deformation of different degree of insufficient thickness of lining. The results show that when the ratio of actual lining to designed thickness is reduced from 0.9 to 0.5. The maximum vertical deformation increased from 18 mm to 45 mm; When the ratio is less than 0.7, the safety factor of bearing capacity and structure decreases significantly. When the ratio is greater than 0.7, the structure is safe. The bearing capacity and safety of the structure decrease with the decrease of the ratio of the thickness of the lining to the actual thickness, and the failure of the thickness of the tunnel lining to meet the design requirements will weaken the bearing capacity of the structure and affect its normal use.
【作者单位】：沈阳建筑大学交通工程学院;
【基金】：国家自然科学基金项目(51078242) 辽宁省自然科学基金项目(201602602) 住房和城乡建设部科学技术项目(2016-K2-012) 沈阳市科学技术基金项目(F16-095-1-00)
【分类号】：U451.4
【正文快照】： 我国土地的板式为西部高,东部低.自东向西顺次增加,陆地中的67%为山地高原等地形[1].山地面积较大,增加了交通运输建造的难度.随着近些年我国经济水平的快速提升,隧道作为基础建设的重要组成部分发展势头迅猛.随着经济的快速发展,隧道作为交通运输的必不可少的一部分也需要相

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