高烈度地震区隧道衬砌背后空洞危害及加固方案优化研究

发布时间：2018-04-30 01:01

本文选题：空洞 + 隧道衬砌　；参考：《石家庄铁道大学》2015年硕士论文

【摘要】：随着我国铁路、公路等交通工程建设的快速发展,铁路、公路隧道的数量迅速攀升。但是己运营隧道己经暴露出或多或少的病害,其中衬砌背后空洞是隧道病害中最普遍的现象之一。本文主要研究处于地震多发地区且衬砌背后出现了大量空洞的己运营隧道,在地震荷载作用下的动力响应规律,进而,对隧道加固方案进行研究。首先对衬砌背后空洞位置、径向大小、环向大小、轴向大小,围岩级别,隧道埋深等参数对隧道抗震的影响开展研究。本文通过衬砌结构的加速度响应、应力响应、内力响应来反映地震过程中空洞对隧道地震动力响应影响。其次,对各影响因素进行敏感性分析,对比得出对隧道衬砌结构影响最大因素。最后对空洞隧道进行加固,本文设计了四种加固方案:注浆加固、注浆+锚杆加固、注浆+内衬加固、注浆+锚杆+内衬加固,对比四种加固方案效果进而选出最优加固方案。
[Abstract]:With the rapid development of railway and highway construction in China, the number of railway and highway tunnels is increasing rapidly. However, the tunnel has been exposed to more or less diseases, among which the cavity behind the lining is one of the most common phenomena. This paper mainly studies the dynamic response law of a large number of hollow tunnels in earthquake-prone areas behind the lining, and then studies the reinforcement scheme of the tunnel. Firstly, the influence of the parameters such as cavity position, radial size, circumferential size, axial size, surrounding rock level, and tunnel depth on the seismic behavior of the tunnel is studied. In this paper, the response of acceleration, stress and internal force of lining structure is used to reflect the effect of cavity on dynamic response of tunnel during earthquake. Secondly, the sensitivity of each factor is analyzed, and the most influential factors on tunnel lining structure are obtained. Finally, four kinds of reinforcement schemes are designed: grouting reinforcement, grouting anchor lining strengthening, grouting anchor lining strengthening, and comparing the effect of four reinforcement schemes to select the best reinforcement scheme.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.91

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