隧道结构裂缝病害评价及治理方法研究

发布时间：2018-06-26 13:29

本文选题：衬砌裂缝 + 裂缝分类　；参考：《西南交通大学》2015年硕士论文

【摘要】：随着我国经济的飞速发展,对交通工程的需求不断增大,铁路、公路、市政等基础设施的修建速度相应增快。近些年国内建设了大量的高速铁路、公路,为保证线路的平顺性,尽量减少曲线,在线路穿越山地丘陵地带时,基本是以桥梁和隧道的形式通过,因此导致桥梁和隧道占整个线路的比例不断升高,高者甚至达到90%。在隧道的营运过程中,隧道内车辆高速运营引起的振动、大幅快速降温,温度变化导致的热胀冷缩,以及特殊地层膨胀而施加在结构上的额外荷载等都可能导致隧道混凝土衬砌产生裂缝。裂缝会极大的降低混凝土结构物的承载能力、防水性及耐久性。如果衬砌裂缝引发衬砌混凝土发生掉快,那便会在很大程度上威胁隧道的安全运营。鉴于目前的情形,对隧道衬砌裂缝病害进行分析及分类整治就愈显紧迫与重要。本文在前人以长度、宽度为依据对隧道衬砌裂缝进行分类的基础上,综合考虑了裂缝的走向及涌漏水情况,对隧道衬砌裂缝病害进行了深入研究,得到成果如下：1.现有的隧道裂缝评定标准主要是针对裂缝的长度、宽度进行评价,然而,隧道裂缝的形成原因较为复杂,影响因素较多,集合形态更是变化万千,前人对裂缝形成原因、变化过程进行了简单的分类和指标化研究,但分类依据和目的尚不够明确,设置的病害参数少而不全,无法准确描述病害的基本几何与力学特性,不能直接在隧道衬砌裂缝病害整治中直接应用。2.裂缝的走向和裂缝渗漏水情况都是影响裂缝特征的关键性因素,本文结合这两个因素的影响,提出了一套全新的隧道衬砌裂缝评定标准。3.通过对不同级别裂缝进行模型实验,为新评定标准中提到的四个级别的裂缝找到了一一对应的整治方法,并详细介绍了整治工序。4.推导出了整治方法的安全系数K的计算公式,用以印证整治效果。5.依托雅西高速土山岗1号隧道,结合现场工况与评定标准,采用数值模拟提出了整治方案并加以验证。
[Abstract]:With the rapid development of economy in our country, the demand for traffic engineering is increasing, and the construction speed of railway, highway, municipal infrastructure and other infrastructure is increasing accordingly. In recent years, a large number of high-speed railways and highways have been built in our country. In order to ensure the smooth running of the lines and minimize the curve, when the lines pass through the mountainous and hilly areas, they are basically passed in the form of bridges and tunnels. As a result, bridges and tunnels account for an increasing proportion of the entire line, or even 90. During the operation of the tunnel, the vibration caused by the high speed operation of the vehicle in the tunnel is greatly and rapidly cooled, and the change of temperature results in thermal expansion and contraction. The concrete lining of the tunnel may be caused by the extra load imposed on the structure by the expansion of the special stratum. Cracks can greatly reduce the bearing capacity, waterproofing and durability of concrete structures. If lining cracks cause lining concrete to fall quickly, it will threaten the safe operation of tunnel to a great extent. In view of the present situation, it is more urgent and important to analyze and classify the tunnel lining crack diseases. On the basis of classifying tunnel lining cracks based on length and width, this paper synthetically considers the trend of cracks and the situation of water leakage, and makes a thorough study of tunnel lining crack diseases. The results are as follows: 1. The existing assessment criteria for tunnel cracks are mainly to evaluate the length and width of cracks. However, the reasons for the formation of tunnel cracks are more complex, the influence factors are many, and the form of assembly is even more varied. A simple classification and index study has been carried out in the process of change, but the classification basis and purpose are not clear enough, the disease parameters are few and incomplete, and the basic geometric and mechanical properties of the disease can not be accurately described. Can not be directly used in tunnel lining crack treatment. The strike of fractures and the leakage of cracks are the key factors that affect the characteristics of cracks. In this paper, a new set of assessment standard of tunnel lining cracks is put forward, which is based on the influence of these two factors. Through the model experiment on the crack of different grades, the one-to-one corresponding treatment method is found for the four classes of cracks mentioned in the new evaluation standard, and the treatment procedure .4. is introduced in detail. The calculation formula of safety factor K of regulation method is deduced to confirm the effect of regulation. Based on Yaxi High-speed Tushanggang No. 1 Tunnel, combined with site working condition and evaluation standard, the regulation scheme was put forward by numerical simulation and verified.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U457.2

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