北京地铁运营隧道病害状态分析

发布时间：2018-02-15 14:17

本文关键词： 地铁隧道病害矿山法隧道盾构隧道结构形式　出处：《土木工程学报》2017年06期 　论文类型：期刊论文

【摘要】：基于北京地铁隧道病害检测结果,分析结构形式、配筋和运营时间对隧道病害状态的影响。研究结果表明,管片接缝变形是盾构隧道病害的根源,并由此引发了盾构断面的椭圆化变形、管片的压溃与错台以及盾构隧道的渗漏水。衬砌开裂是矿山法隧道的主要病害,裂缝宽度与深度受运营时间影响大且具有离散性强、随机性大的特点,配筋对隧道结构安全有积极影响。渗漏水受降水的影响较大,多出现于隧道衬砌结构的缝隙,如盾构隧道的接缝、螺栓孔或矿山法隧道的变形缝、施工缝和衬砌裂缝等。衬砌空洞多位于拱顶,形状接近于长条形、正方形和椭圆形,且多伴随着邻近衬砌的开裂。混凝土碳化深度与运营时间成正比,碳化深度和速率在隧道道床位置最大、边墙次之、拱顶最小。裂缝是整体式道床的常见病害,道床在剥离的同时还伴随沿其纵向的扭转。
[Abstract]:Based on the results of disease detection in Beijing metro tunnel, the influence of structure, reinforcement and operation time on the condition of tunnel disease is analyzed. The results show that the deformation of segment joint is the root of the disease of shield tunnel. The elliptical deformation of shield section, the crushing and staggered section of the shield section and the leakage of the shield tunnel are caused. The lining cracking is the main disease of the mine tunnel, and the width and depth of the crack are greatly affected by the operation time and have strong dispersion. Because of its large randomness, reinforcement has a positive effect on the safety of tunnel structure. The leakage water is affected by precipitation, and it often appears in the cracks of tunnel lining, such as the joint of shield tunnel, bolt hole or deformation joint of mine tunnel. Construction joints and lining cracks, etc. The lining cavities are mostly located at the arch roof, with shapes close to long, square and elliptical shapes, and most of them are accompanied by cracks of adjacent lining. The depth of concrete carbonation is proportional to the operating time. The depth and rate of carbonation are the largest in the tunnel bed, the second in the side wall, and the smallest in the vault. Cracks are common diseases of the monolithic bed, which is accompanied by torsion along its longitudinal direction.
【作者单位】：北京交通大学城市地下工程教育部重点实验室;北京市地铁运营有限公司地铁运营技术研发中心;北京市市政工程研究院;
【基金】：北京市交通行业科技项目国家自然科学基金“青年”基金(51308036)
【分类号】：U457.2

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