城市地铁施工安全风险动态分析与控制

Due to the characteristics of urban subway construction of complex construction environment, the high safety risk and greatly difficult construction technology, this project will build a dynamic risk analysis and estimation method involving many influence factors, such as the excavated geological conditions, engineering environmental conditions, construction methods and human factors and so on, for the urban subway construction safety. The method is proposed on the basis of the new generation of information technology, expert database, and combination of the typical urban subway construction methods for the complex geological conditions. Consequently, a three dimensional soil constitutive model considering the stress path, original anisotropy and time effect is created, and then a multi-scale construction modeling and analysis method is proposed to really reflect the micro-structure of the material of the pebble layer. This project will study the big scale shield tunneling test technology and numerical simulation tests to verify the reliability of the numerical simulation and reveal the layer deformation mechanism, failure mode and the adverse influence for adjacent structure induced by subway excavation. Furthermore, this project will create and develop a new perception system of the risk sources and a new acquisition system with 6 parameters and data processing technology. Integrating the perception, acquisition and 5s data transfer technology, a dynamic risk monitoring and precaution system for the urban subway construction safety is built and a series of new construction control technological measures are proposed by the combination of excavation technology of the station and the tunnel between the stations. The project will provide the theoretical guidance and technological support for creating the risk control and administration system of urban subway construction safety.

地铁施工环境复杂，技术难度大，安全风险高。本项研究拟结合城市典型复杂环境下的地铁工程施工主要工法，基于新一代信息技术和专家经验，考虑地质、环境、工法、人因等风险因素建立地铁施工安全多因素耦合的动态风险分析与评估方法；建立考虑应力路径、原生各向异性以及时间效应的三维土体本构模型，提出可反映砂砾石材料与砂砾石地层细观结构性的地铁施工多尺度数值仿真模型与分析方法；开展地铁隧道盾构施工大比尺物理模型试验技术及仿真试验研究，验证数值模型的有效性；揭示典型场地和环境条件下地铁施工引起的地层变形规律、失效模式以及对临近结构的影响；研发风险源感知和隧道6参数数据采集及处理新技术，集成感知、采集和5S数据传输技术，研制一套适合城市地铁施工安全风险动态监测及预警系统；结合地铁车站及地铁隧道的不同施工方法，研发新的工程控制技术。为建立地铁工程施工安全风险管理体系提供理论与方法及技术支撑。

地铁施工环境复杂，技术难度大，安全风险高。本项研究结合城市典型复杂环境下的地铁工程施工主要工法，基于新一代信息技术和专家经验，考虑地质、环境、工法、人因等风险因素建立地铁施工安全多因素耦合的动态风险分析与评估方法；建立了考虑应力路径、原生各向异性以及时间效应的三维土体本构模型，提出了可反映砂砾石材料与砂砾石地层细观结构性的地铁施工多尺度数值仿真模型与分析方法；开展了地铁隧道盾构施工大比尺物理模型试验技术及仿真试验研究，验证了数值模型的有效性；揭示了典型场地和环境条件下地铁施工引起的地层变形规律、失效模式以及对临近结构的影响；研发了风险源感知和隧道6参数数据采集及处理新技术，集成感知、采集和5S数据传输技术，研制了一套适合城市地铁施工安全风险动态监测及预警系统；结合地铁车站及地铁隧道的不同施工方法，研发了新的工程控制技术。为建立地铁工程施工安全风险管理体系提供了理论与方法及技术支撑。