盾构隧道邻近既有建筑物施工风险评价研究

发布时间：2018-06-27 11:43

本文选题：邻近施工 + 风险评价　；参考：《兰州交通大学》2015年硕士论文

【摘要】：盾构隧道邻近既有建筑物的施工被称为邻近施工,邻近施工在城市中不可避免,同时因地下空间的开发利用会越来越普遍,且具有周边环境复杂、施工难度大、施工工序复杂等特点,增添了邻近施工的不确定性,为邻近施工的顺利实施带来巨大的挑战。因此,有必要去对邻近施工项目因素进行风险分析,并制定相应的风险应对措施,避免潜在的风险因素影响项目目标的正常实施。在对影响邻近施工的项目因素进行风险分析时,本文通过风险识别的手段、方法,结合邻近施工项目特点,分析了邻近施工风险发生机理,构建了适合邻近施工风险分析的风险评价指标体系,作为对邻近施工项目进行风险分析和评价的基础。为了获得客观公正的数据,为下一步的项目风险分析做好准备,本文通过调查问卷的方式对有关的调查对象进行了访问。基于构建的邻近施工项目风险评价指标体系,通过对评价方法的选取,并考虑到邻近施工项目因素间的相互关系,本文采用了模糊网络分析法(FE—ANP)对邻近施工项目进行风险评价,建立了FE—ANP结构网状模型,利用三角模糊数重要语言标度合成模糊判断矩阵,根据网络层次分析法超矩阵的计算,确定判断矩阵的权重向量,并采用模糊综合评判的决策思想对此进行评价。鉴于超矩阵的计算较为复杂,本文利用SD软件对项目中的超矩阵进行运算分析,从而获得评价矩阵的未加权超矩阵、加权超矩阵、极限超矩阵等,由极限超矩阵获得的极限相对排序向量,反映了底层元素对项目整体状况的影响程度,由此可通过极限相对排序向量识别底层元素对项目整体起支配作用的关键风险因素,通过对调查问卷的数据进行整理分析,得到单因素评判矩阵,最后采用模糊综合评价法对项目结构模型进行综合评价,由评价结果确定了项目相应的风险等级,同时也获得了地层情况、近接情况、设计、施工、近接安全控制措施、人员素质方面相应的风险等级以及风险变化发展趋势。根据所识别出的关键风险因素以及综合评价结果,本文提出了相应的一些风险应对措施。
[Abstract]:The construction of the existing building adjacent to the shield tunnel is called the adjacent construction, and the adjacent construction is inevitable in the city. At the same time, the exploitation and utilization of the underground space will be more and more common, and the surrounding environment is complicated, the construction is difficult and the construction process is complex, which adds the uncertainty of the adjacent construction, which is the smooth implementation of the adjacent construction. It is a great challenge. Therefore, it is necessary to carry out risk analysis on the factors of adjacent construction projects, and to formulate corresponding risk measures to avoid the potential risk factors affecting the normal implementation of the project objectives. In the risk analysis of the factors affecting the adjacent construction projects, this article through the means of risk identification, method, combined with adjacent application. This paper analyzes the mechanism of construction risk in adjacent construction, constructs a risk evaluation index system suitable for adjacent construction risk analysis, which is the basis for risk analysis and evaluation of adjacent construction projects. In order to obtain objective and impartial data and prepare for the next project risk analysis, this paper passes the questionnaire survey. In this paper, the fuzzy network analysis (FE - ANP) is used to evaluate the risk of adjacent construction projects, and the FE - ANP structure network is established. The fuzzy judgment matrix is synthesized by the trigonometric fuzzy number important language scale, and the weight vector of the judgement matrix is determined according to the calculation of the super matrix of the network analytic hierarchy process. And the fuzzy comprehensive evaluation is used to evaluate it. In view of the complexity of the calculation of the super matrix, the SD software is used for the super matrix in the project. In order to obtain the unweighted super matrix, weighted super matrix, limit super matrix and so on, the limit relative ranking vector obtained by the limit super matrix, which reflects the influence degree of the underlying element on the overall situation of the project, can be obtained by the limit relative ordering to identify the dominating effect of the underlying element to the project as a whole. The key risk factor, through the analysis of the data of the questionnaire, the single factor evaluation matrix is obtained. Finally, the fuzzy comprehensive evaluation method is used to evaluate the project structure model synthetically. The risk grade of the project is determined by the evaluation result, and the stratum condition, the close connection, the design, the construction and the close safety control are also obtained. Measures, the corresponding risk level of personnel quality and the trend of risk change development. According to the key risk factors identified and the results of comprehensive evaluation, this paper puts forward some corresponding measures to deal with risk.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.43

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