层次可拓模型在隧道施工风险评估中的应用研究

发布时间：2018-04-10 18:18

本文选题：可拓理论 + 层次分析法　；参考：《中南林业科技大学》2015年硕士论文

【摘要】：随着我国交通网络的逐步完善,隧道建设在质和量上都有了飞速发展。与此同时,隧道施工过程中的安全问题也越来越突出。稍有大意将会带来巨大的经济损失和人员伤亡。国内外对于隧道工程施工方面的研究大多数是针对隧道结构稳定性及其力学特性的分析,与隧道施工风险评估相关的研究相对匮乏。因此,开展对隧道施工风险评估的相关研究是具有重要的理论价值和工程实际意义的。本文在国内外现有研究成果的基础上,通过理论分析和工程现场测试,开展了隧道施工风险评估理论的研究。根据隧道施工的特点,针对隧道施工的风险辨识、风险分类、风险控制和管理等方面展开探讨。并重点对隧道施工风险评价指标体系和评价模型进行了研究。研究工作的主要内容和取得的主要创新性结论如下。研究工作的主要内容：1.在对国内外相关理论及风险评价方法进行研究之后,提出本文的研究内容、研究方法以及技术路线等。2.在通过对现有的隧道风险评价体系分析的基础上,结合对超前地质预报结果的分析和应用,提出了隧道施工风险评估方法的结构体系。3.结合专家地质调查和超前地质预报,建立隧道施工过程中的风险源识别系统。通过分析风险评价指标体系的构建原则,建立隧道施工风险评价指标体系。4.运用可拓理论,建立了隧道施工风险评价模型,并确定了待评方案的关联度。结合层次分析法确定了相关指标权重,通过计算综合关联度并最终确定综合评价等级。5.对葛家沟隧道洞口段和石人子沟隧道洞身开展了超前地质预报和监控量测,在此基础上,应用所提出的评估模型和方法对上述工程进行了风险评估实践。研究工作取得的创新成果：1.结合层次分析法和可拓原理等相关理论,对隧道施工风险评估的内涵进行了拓展,对评估的指标体系进行了改进。2.为提高隧道施工风险评估的可靠性,提出了评估要素的构建原则及构建方法。选取了包含自然因素、设计因素、工程地质因素、技术与管理因素等4个要素作为一级指标。并选取了大气降水、偏压角度、开挖宽度、扁平率、开挖方法、围岩级别、不良地质、地下水、风化程度、超欠挖程度、工作面封闭情况、施工技术水平、管理技术水平等13个要素作为二级指标。通过对各二级指标及其评价标准进行组合,构建了更合理的隧道施工风险评价指标体系。3.将可拓理论与层次分析法相结合,确定了指标的经典域和节域,并建立了隧道施工风险的待评物元矩阵和关联度计算方法。在此基础上,提出了隧道施工风险评价的层次可拓模型和分析方法。4.运用上述建立的理论方法对葛家沟隧道洞口段进行了实际的风险评估。根据现场监控测量信息反馈,证明基于层次可拓模型的隧道洞口段风险评价方法是可靠的,所建立的风险模型为隧道洞口段施工风险评估提供了理论依据。5.运用层次可拓模型对石人子沟隧道工程实例进行风险评估,结果证明层次可拓模型在大断面隧道风险评价这种方法是可靠的。
[Abstract]:With the traffic network in China is gradually perfect, the construction of the tunnel in quality and quantity have made rapid development. At the same time, the security problem in the process of tunnel construction is more and more outstanding. The slightest effect will bring huge economic losses and casualties. Most of the research for the construction of tunnel engineering at home and abroad is the analysis for structural stability the mechanical properties of the tunnel and tunnel construction, and related risk assessment research is relatively scarce. Therefore, research on tunnel construction risk assessment is of important theoretical value and practical significance. This paper based on the existing research results at home and abroad, through theoretical analysis and engineering test, carried out the research of risk the evaluation theory of tunnel construction. According to the characteristics of tunnel construction, the tunnel construction risk identification, risk classification, risk control and management and other aspects of development To explore and research focus on the tunnel construction risk evaluation index system and evaluation model. The main innovations of the main contents of the research work and results are as follows. The main contents of the research work: after the study of 1. in the evaluation of domestic and international relevant theory and method of risk, put forward the research content, research methods and technical route.2. based on the analysis of the existing tunnel risk evaluation system, combined with the analysis and application of geological forecast results, puts forward the structure system of risk assessment method of tunnel construction.3. with expert geological survey and geological prediction, risk source recognition system is established in the process of tunnel construction. By constructing principles of evaluation index system risk, establish tunnel construction risk evaluation index system of.4. based on extension theory, establish a risk assessment model of tunnel construction, and ensure the The correlation of the proposal to be assessed. Combining the AHP to determine the index weight by calculating the comprehensive correlation degree and ultimately determine the level of comprehensive evaluation of.5. on Ge Jia Gou tunnel and Dan Renzi ditch tunnel to carry out geological prediction and monitoring, on this basis, evaluation model and method the application of the proposed risk assessment of the engineering practice. Research achievements: 1. combining AHP and extension principle and other related theories, the connotation of the tunnel construction risk assessment index system is developed, the evaluation of improved.2. in order to improve the reliability of tunnel construction risk assessment, put forward the construction method and principle of evaluation factors. Selected include natural factors, design factors, engineering geological factors, 4 factors of technology and management factors as the first level indexes and the selection of large. Precipitation, bias angle, excavation width, flat rate, excavation method, the rock level, bad geology, groundwater, weathering degree, overbreak degree, working face is closed, the level of construction technology, the 13 elements of management technical level as two indicators. Through the combination of evaluation standard and the two indicators. To build a more reasonable tunnel construction risk evaluation index system of.3. extension theory and AHP to determine the combination of classical domain and joint domain index, and establishes the matter-element matrix and correlation calculation method of tunnel construction risk. On this basis, put forward the risk assessment of tunnel construction levels the extension model and the analysis method of.4. using the theory method of the establishment of the Ge Jia Gou tunnel of actual risk assessment. According to the field monitoring measurement and information feedback, prove the tunnel level extension model based on A risk assessment method is reliable, the risk model provides a theoretical basis for.5. using hierarchical extension model to evaluate the risk of stone ditch tunnel project as an example of tunnel construction risk evaluation, results show that the level of extension model price evaluation method in the large section tunnel risk is reliable.

【学位授予单位】：中南林业科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455

【引证文献】