城市地下综合管廊抗爆安全评估与控制

In order to fulfill the requirements of new-type urbanization and city modernization of China, the government proposed a national strategy of comprehensively promoting the development of urban underground utility tunnels. Since pipes with hazardous materials such as natural gas and heating power are installed in the utility tunnel with other pipes, high confinement and congestion conditions may be formed and significant consequences will occur if gas cloud from a leak pipe is ignited. This project proposes a risk analysis and evaluation method considering multiple explosion risk factors based on the specific characteristics of underground utility tunnels. Meanwhile, numerical modelling methods are applied to model the complicated environments of underground utility tunnels and calculate explosion loads. An explosion experiment will be conducted to verify the accuracy of the proposed numerical methods in order to provide an accurate and reliable assessment method of explosion effects. Furthermore, based on structure integrity management (SIM) method, a comprehensive system for controlling explosion safety is developed to extend the lifespan and improve the explosion resistance of the utility tunnels. In conclusion, in this project, the explosion analysis methods are modified and further developed according to basic explosion risk characteristics of underground utility tunnels in order to provide theoretical basis and technical support for the development of an explosion safety management and control system.

为了适应我国新型城镇化和现代化城市建设的需求，国家提出了全面推动城市地下综合管廊建设的战略思想。由于天然气、热力等高危管线以及大量其他管线同时入廊，管廊内部形成极度拥堵的封闭空间，一旦发生天然气泄漏事故并引发爆炸，后果严重。为减轻城市地下高危管线爆炸风险，本项目通过分析地下综合管廊爆炸风险各项致灾因子，建立考虑多因素耦合的地下综合管廊爆炸风险分析与评估方法。同时，根据地下综合管廊高度拥堵封闭的复杂环境，结合数值模拟方法与模型试验，建立准确可靠的地下综合管廊爆炸效应分析方法。此外，基于全生命周期结构完整性管理方法，构建系统全面的结构抗爆安全控制体系，延长地下管廊使用寿命，提升管廊抗爆性能。总之，本项目拟针对城市地下综合管廊爆炸风险基本特征，发展和完善地下综合管廊爆炸风险评估与控制的理论与方法，为建立地下综合管廊抗爆安全管理和控制体系提供理论基础及技术支撑。

为发展和完善地下综合管廊气体爆炸风险评估与控制理论和方法，本课题通过深入分析地下综合管廊爆炸风险各项致灾因子，建立了多因素耦合的地下综合管廊气体爆炸风险贝叶斯网络模型；基于CFD数值仿真计算，探讨地下综合管廊内气体爆炸特性，提出了一种高效准确的气体爆炸压力BAS-BPNN预测方法；针对地下综合管廊高度拥堵封闭的复杂环境，提出了管廊结构抗爆设计优化方法；构建了系统全面的地下综合管廊全生命周期气体爆炸风险评估与控制框架，将管廊结构抗爆设计及变更性能考虑在内。本研究为地下综合管廊内气体爆炸特性研究及抗爆安全管理和控制提供了技术指导和理论支撑。.项目资助发表英文专著1本；SCI论文5篇；会议论文1篇；待发表论文2篇。培养博士生2名，其中1名已取得博士学位，1名在读。项目投入经费61万元，支出43.522944万元，各项支出基本与预算相符；剩余经费17.477056万元，剩余经费计划用于本项目后续研究支出。