软土盾构隧道芳纶布加固机理和效果研究

发布时间：2018-01-13 14:02

本文关键词：软土盾构隧道芳纶布加固机理和效果研究　出处：《现代隧道技术》2014年05期 　论文类型：期刊论文

【摘要】：运营盾构隧道的横向收敛变形直接关系到隧道的结构安全,粘贴芳纶布是常用的隧道变形整治加固方法之一,然而目前对其加固机理和加固效果还不明确。论文利用数值模拟方法,以隧道横向收敛变形和接缝张开量为指标,探讨了芳纶布对隧道横向变形的加固机理和加固效果;针对芳纶布粘贴时机与粘贴层数对加固效果的影响进行了参数影响分析。研究发现,粘贴芳纶布能有效地限制隧道横向收敛和接头变形,但芳纶布加固效果受隧道变形程度的影响,即隧道变形越小,加固效果越好;增加芳纶布粘贴层数,可以显著提高加固效果,最佳加固层数为2~3层。
[Abstract]:The transverse convergent deformation of shield tunnel is directly related to the structural safety of the tunnel. Sticking aramid cloth is one of the commonly used methods of tunnel deformation treatment and reinforcement. However, at present, the reinforcement mechanism and reinforcement effect are not clear. The paper uses numerical simulation method to take the transverse convergence deformation and joint opening of tunnel as the index. The reinforcement mechanism and effect of aramid fabric on transverse deformation of tunnel are discussed. Based on the analysis of the influence of the bonding time and the number of layers on the reinforcement effect, it is found that the adhesion of aramid cloth can effectively limit the transverse convergence and joint deformation of the tunnel. However, the reinforcement effect of aramid cloth is affected by the degree of tunnel deformation, that is, the smaller the deformation of tunnel, the better the reinforcement effect. The reinforcement effect can be improved significantly by increasing the number of layers attached to aramid cloth, and the optimum number of layers is 2 ~ 3 layers.
【作者单位】：同济大学地下建筑与工程系;同济大学岩土及地下工程教育部重点实验室;
【基金】：国家自然科学基金(51278379) 国家基础研究技术项目(2011CB013800) 上海市自然科学基金(12ZR1433600) 上海青年科技启明星计划(14QB1401100)
【分类号】：U457.3
【正文快照】： 第51卷第5期(总第358期)2014年10月出版刘梓圣1张冬梅1,2(1同济大学地下建筑与工程系,上海200092;2同济大学岩土及地下工程教育部重点实验室,上海200092)修改稿返回日期:2014-08-281引言盾构施工技术的快速发展使得盾构隧道成为现阶段我国城市轨道交通隧道的主要结构形式。然

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