大断面市政公路隧道扁平率与支护参数适宜性研究

发布时间：2018-06-04 06:31

本文选题：大断面隧道 + 扁平率　；参考：《西南交通大学》2017年硕士论文

【摘要】：近年来,随着我国经济不断高速发展,城市化进程中带来的"城市病"现象不断困扰着市民的日常生活。为解决拥堵问题,新建市政公路车道数不断增加,扁平率更低、跨度更大的单洞三车道及以上的大断面公路隧道便应运而生,并呈现出快速增多的趋势。鉴于现阶段大断面市政公路隧道扁平率与支护参数的选择更多的是借鉴国内外类似工程经验,并无一套成熟的技术可供参考。其扁平率与支护体系利用率与合理性、可靠度,是否适用于该工程等情况,有一定的研究空间。因此,开展大断面市政公路隧道扁平率与支护参数的适宜性研究十分必要。本文以马峦山隧道工程为依托,以统计分析,数值模拟,室内试验为主要研究手段,系统研究了大断面市政公路隧道扁平率与支护体系的适宜性,主要成果如下:(1)充分调研国内外扁平大断面隧道扁平率与支护参数现状,依据调研数据对大断面扁平隧道设计特征进行分析研究总结规律,结合依托工程的设计资料,对依托工程隧道扁平率与支护参数的合理性进行了初步评估。(2)在综合调研国内外大断面隧道扁平率与支护参数的基础上,以具体工程为依托,采用数值模拟、室内试验等研究手段,对不同扁平率与支护参数下大断面公路隧道的围岩-支护体系稳定性开展研究,重点对围岩-支护体系的应力、位移场演变特征、支护体系的受力特征等开展深入分析,揭示了大断面公路隧道不同扁平率与支护参数下围岩-结构的力学行为特征,并探讨了大断面市政隧道扁平率与支护参数的适宜性。(3)以数值模拟及室内试验研究为基础,结合当前大断面市政隧道扁平率与支护参数特点,提出不同围岩级别条件下大断面市政隧道合理扁平率与支护参数范围,对依托工程原设计进行了优化。
[Abstract]:In recent years, with the rapid development of China's economy, the phenomenon of "urban disease" in the process of urbanization has been puzzling the daily life of citizens. In order to solve the problem of congestion, the number of new municipal highway driveways is increasing, the flat rate is lower, and the large-section highway tunnels with larger span of single hole and three lanes and above emerge as the times require, and show a trend of rapid increase. In view of the fact that the selection of flat rate and supporting parameters of large-section municipal highway tunnel at present is more for reference of similar engineering experience at home and abroad, there is no mature technology for reference. The flat rate, the utilization ratio and the rationality of the support system, the reliability, and whether it is suitable for the project have some research space. Therefore, it is necessary to study the suitability of flat rate and supporting parameters of large section municipal highway tunnel. Based on the Malanshan tunnel project, the paper systematically studies the flatness rate and the suitability of supporting system of large-section municipal highway tunnel by means of statistical analysis, numerical simulation and laboratory test. The main results are as follows: (1) the present situation of flat rate and support parameters of flat and large section tunnels at home and abroad is fully investigated. According to the investigation data, the design characteristics of large section and large section tunnels are analyzed and summarized, and combined with the design data of supporting engineering, The rationality of tunnel flatness rate and supporting parameters of supporting engineering is preliminarily evaluated. On the basis of comprehensive investigation of the flat rate and supporting parameters of large cross-section tunnels at home and abroad, the numerical simulation is adopted based on the concrete project. The stability of surrounding rock support system of large cross section highway tunnel under different flattening rate and supporting parameters is studied by laboratory test, with emphasis on the evolution characteristics of stress and displacement field of surrounding rock support system. The mechanical behavior characteristics of surrounding rock structure under different flattening rate and support parameters of large-section highway tunnel are revealed by in-depth analysis of the mechanical characteristics of supporting system. The suitability of flat rate and supporting parameters of large section municipal tunnel is discussed. Based on numerical simulation and laboratory test, the characteristics of flat rate and supporting parameters of large section municipal tunnel are discussed. The reasonable flat rate and support parameter range of large-section municipal tunnel under different surrounding rock levels are put forward, and the original design of supporting engineering is optimized.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U451

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