盾构施工诱发建筑物变形及安全控制研究

发布时间：2018-01-07 09:02

本文关键词：盾构施工诱发建筑物变形及安全控制研究　出处：《华中科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：我国地铁建设进入快速发展阶段,盾构施工是我国地铁施工采取的主要方式,盾构施工将对土层稳定性产生影响进而对临近建筑物安全造成重要影响,因此,盾构施工临近建筑物的安全状况越来越引起人们的关注,其安全控制问题也已经成为地铁建设中非常重要的研究课题。建筑物变形控制是盾构施工建筑物临近安全控制的核心内容。在借鉴国内外相关研究的基础上,本文充分挖掘分析盾构施工诱发建筑物变形重要影响因素,结合先进的数据处理技术和人工智能预测方法,对盾构施工诱发建筑物变形时间变形规律和空间影响因素关联性进行研究分析,将建筑物变形监测信息和巡视信息融合得到建筑物变形综合安全警情状态,实现盾构施工临近建筑物变形实时动态安全预警控制与管理决策。本文主要研究内容如下:(1)盾构施工临近建筑物变形时间序列预测分析。利用小波分解对建筑物变形时间序列监测数据进行分解降噪,消除监测数据本身受外界干扰产生的随机波动影响,能够有效提高监测数据的准确性和有效性;构建基于粒子群优化算法参数优化的最小二乘支持向量机预测模型对建筑物变形进行时间序列预测得到下一监测时间的变形值,并依据下一监测时间变形值实现建筑物变形安全的事前控制。(2)盾构施工临近建筑物变形空间影响因素分析。构建基于粒子群优化算法参数优化的最小二乘支持向量机建筑物变形关联模型,利用模型分析建筑物变形影响因素与变形特征之间的关联关系;然后在蒙特卡洛模拟仿真的基础上利用卡方关联分析方法和灰色关联分析方法分析影响因素与建筑物变形特征之间的关联度,并利用Efast全局敏感性算法分析影响因素的敏感性,在施工管理过程中加强对重要因素和敏感性因素的关注,提高建筑物安全管理事中控制的效率。(3)盾构施工临近建筑物变形安全控制预警决策。提出D-S证据理论建筑物安全状态融合决策模型,利用模型在实现分别巡视信息和监测信息融合的基础上融合两者安全警情状态得到建筑物综合安全状态,为下一步建筑物安全管理控制提供决策依据。
[Abstract]:The subway construction in our country has entered a stage of rapid development, the shield construction is the main way to take the subway construction in our country, the shield construction will have an impact on the stability of soil and cause important influence on the safety of adjacent structures so the shield construction of adjacent building safety has attracted more and more attention of the security control problem has also become a research topic is very important in the subway construction. The building deformation control is the core content of safety control of shield construction of buildings nearby. On the basis of relevant research at home and abroad, this paper fully explores the important factors of deformation analysis on influence of shield construction in buildings, combined with the prediction method of advanced data processing technology and artificial intelligence, the deformation of the deformation law and influence factors of spatial association of the research and analysis of the shield tunneling induced building, the building deformation monitoring and inspection information As the information fusion deformation of building comprehensive safety warning condition, realize the real-time dynamic deformation of shield tunnel construction of adjacent building safety control and management decision-making. The main research contents of this paper are as follows: (1) the shield construction adjacent building deformation prediction of time series. By using wavelet decomposition and noise time series of monitoring data of the deformation of buildings, eliminate random fluctuation effect of monitoring data of the interference generated by itself, can effectively improve the accuracy of monitoring data and effectiveness; the construction of particle swarm optimization algorithm to optimize the parameters of least squares support vector machine prediction model of deformation time series prediction of deformation monitoring time value of a building based on a time basis and monitoring deformation value of the prior control the deformation of building safety. (2) analysis of shield construction near the building deformation space factors. Structure Based on particle swarm optimization algorithm to optimize the parameters of least squares support vector machine building deformation correlation model, using the relationship model between influence factors analysis of building deformation and deformation characteristics; then based on the Monte Carlo simulation in using analysis method and grey correlation analysis method and analysis of influencing factors of building deformation characteristics between the associated card related degree. And using the Efast global sensitivity analysis of the factors affecting the sensitivity of the algorithm, strengthen the important factors and sensitive factors concerned in the construction management process, improve the efficiency of control building safety management in the event. (3) the shield construction near the building deformation safety control early warning decision. Put forward the D-S evidence theory building safety state fusion decision model based model in the implementation of inspection and monitoring information respectively on the information fusion of the two fusion safety alarm The state of the building is integrated with the state of building safety, which provides the decision basis for the next step of building safety management and control.

【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.43;TU746

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