地下水封油库具有规模大、安全性要求高、工程施工工艺复杂以及不可预见的风险因素多等特点,其安全问题至关重要。该文基于专家调查法和模糊数学法,以Visual Studio 2017作为软件开发平台,运用Visual Basic编程语言编程,开发了地下水封...地下水封油库具有规模大、安全性要求高、工程施工工艺复杂以及不可预见的风险因素多等特点,其安全问题至关重要。该文基于专家调查法和模糊数学法,以Visual Studio 2017作为软件开发平台,运用Visual Basic编程语言编程,开发了地下水封油库施工期安全风险评估系统。根据所识别的风险因子,运用所开发系统对实际地下水封油库案例进行了施工期风险评估,依据研究结果给出了合理有效的施工建议。该系统为地下水封油库的风险管理提供技术支持。展开更多
A hydro tunnel in Serbia＇s capitol Belgrade is currently constructed using EPB TBM （earth pressure balance tunneling machine）. To assess the risk of TBM jamming, an analysis is made including calculation of expecte...A hydro tunnel in Serbia＇s capitol Belgrade is currently constructed using EPB TBM （earth pressure balance tunneling machine）. To assess the risk of TBM jamming, an analysis is made including calculation of expected ground pressures on the machine and critical frictions and pressures along the route, which could stop the advance due to limitations of the machine. The ground pressures were calculated using 2D plain strain analytical and numerical methods, and using 2D＋ plain strain axisymmetrical numerical method to simulate effects of TBM advance, effects of deformations in front of TBM and effects of rigidity changes in area of TBM shield tail where ground abruptly looses contact with the shield and could additionally deform toward the concrete liner. Calculated deformations and stresses varied along the TBM and concrete liner, with prominent concentrations around the cutter head and TBM shield tail. The results of analytical and numerical calculations were compared and combined to construct diagrams of expected ground pressures on TBM along the tunnel route, and diagrams of critical frictions that may cause the jamming. Based on this analysis and ongoing measurements of ground pressures on TBM, recommendations have been made on excavation regimes, and additional investigations in front of TBM. So far a relatively fair match of the predicted and measured ground pressures on TBM is observed.展开更多
文摘地下水封油库具有规模大、安全性要求高、工程施工工艺复杂以及不可预见的风险因素多等特点,其安全问题至关重要。该文基于专家调查法和模糊数学法,以Visual Studio 2017作为软件开发平台,运用Visual Basic编程语言编程,开发了地下水封油库施工期安全风险评估系统。根据所识别的风险因子,运用所开发系统对实际地下水封油库案例进行了施工期风险评估,依据研究结果给出了合理有效的施工建议。该系统为地下水封油库的风险管理提供技术支持。
文摘A hydro tunnel in Serbia＇s capitol Belgrade is currently constructed using EPB TBM （earth pressure balance tunneling machine）. To assess the risk of TBM jamming, an analysis is made including calculation of expected ground pressures on the machine and critical frictions and pressures along the route, which could stop the advance due to limitations of the machine. The ground pressures were calculated using 2D plain strain analytical and numerical methods, and using 2D＋ plain strain axisymmetrical numerical method to simulate effects of TBM advance, effects of deformations in front of TBM and effects of rigidity changes in area of TBM shield tail where ground abruptly looses contact with the shield and could additionally deform toward the concrete liner. Calculated deformations and stresses varied along the TBM and concrete liner, with prominent concentrations around the cutter head and TBM shield tail. The results of analytical and numerical calculations were compared and combined to construct diagrams of expected ground pressures on TBM along the tunnel route, and diagrams of critical frictions that may cause the jamming. Based on this analysis and ongoing measurements of ground pressures on TBM, recommendations have been made on excavation regimes, and additional investigations in front of TBM. So far a relatively fair match of the predicted and measured ground pressures on TBM is observed.
