基于三维激光扫描的盾构隧道横向变形指标研究

发布时间：2018-03-06 19:41

本文选题：三维激光扫描　切入点：隧道　出处：《铁道科学与工程学报》2017年08期 　论文类型：期刊论文

【摘要】：采用三维激光扫描技术对某运营期盾构隧道段(含联络通道)进行全空间变形检测,通过数据处理获得每环隧道横断面全周变形值,结合现场勘察隧道裂缝、错台和渗漏水等病害情况,分析隧道横向变形与隧道结构性能的关系。研究结果表明:运营期隧道结构变形模式为斜鸭蛋形;在盾构隧道长轴(或短轴)变形量小于0.3%D(椭圆度小于0.6%)时,隧道无渗漏、管片无破坏及错台现象;在盾构隧道长轴(或短轴)变形量大于0.3%D但小于1%D(椭圆度大于0.6%但小于1%)时,隧道逐渐出现渗漏、管片破坏和错台等病害;在盾构隧道长轴(或短轴)变形量大于1%D(椭圆度大于1%)时,隧道出现大量渗漏浆、管片破坏及错台现象。研究成果对于制定隧道检测计划、完善隧道设计规范中的相关规定等有一定的参考价值。
[Abstract]:The 3D laser scanning technique is used to detect the full-space deformation of shield tunnel section (including the contact channel) in a certain period of operation. Through the data processing, the total circumferential deformation value of the cross-section of each ring tunnel is obtained, and the tunnel cracks are investigated on the spot. The relationship between tunnel transverse deformation and tunnel structure performance is analyzed in this paper. The results show that the tunnel structure deformation mode is inclined duck egg-shaped during operation period. When the deformation of the long axis (or short axis) of the shield tunnel is less than 0.3 D (the ellipticity is less than 0.6), the tunnel has no leakage, no segment damage and no stagger phenomenon; when the deformation of the long axis (or short axis) of the shield tunnel is greater than 0.3D but less than 1D (the ellipticity is greater than 0.6% but less than 1b), When the deformation of the shield tunnel's long axis (or short axis) is greater than 1D (ellipticity > 1D), the tunnel has a lot of leakage slurry. The research results have certain reference value for the establishment of tunnel inspection plan and the improvement of relevant regulations in tunnel design code.
【作者单位】：苏州大学土木与环境调控工程系;江西农业大学工学院;苏州轨道交通集团有限公司运营分公司;
【基金】：江苏省青年基金资助项目(BK20150337) 江苏省交通运输科技与成果转化项目(2015Y04)
【分类号】：U455.43

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