我国城市燃气系统抗震减灾技术发展现状

介绍燃气系统抗震相关研究的主要方向,抗震相关标准规范,燃气管道抗震措施、燃气管道地震紧急处置系统、燃气管道地震切断装置的发展现状。燃气管道抗震设计主要参考GB50032—2003《室外给水排水和燃气热力工程抗震设计规范》与GB 50981—2014《建筑机电工程抗震设计规范》,相关研究围绕燃气管道抗震设计、提高管道抗震能力开展。借鉴日本、美国等地震频发国家的燃气管网的抗震减灾经验,地震紧急处置系统作为燃气系统防震减灾的重要一环得到了国内广泛关注,其主要难点在于地震紧急切断阈值的确定。地震紧急切断装置的研究比较成熟,出现落球式、永磁式、电控式等多种紧急切断装置,并有了相应的研发成果应用。我国燃气管道抗震减灾相关研究工作缺少工程上的衔接与示范,相应的系统建设缺乏规范指导,导致相应的研究成果缺少实践反馈修正,下一步研究中应予以侧重。

Development Status of Earthquake Resistance and Disaster Reduction Technology for City Gas Systems in China

The main direction of related research of gas systems earthquake resistance and relevant standards and codes,and development status of gas pipeline earthquake resistance measures,gas pipeline seismic emergency disposal system and gas pipeline seismic cut-off device are introduced. The seismic design of gas pipeline mainly refers to Code for Seismic Design of Outdoor Water Supply,Sewerage,Gas and Heating Engineering( GB 50032-2003) and Code for Seismic Design of Mechanical and Electrical Equipment( GB 50981-2014),and the related research focuses on the seismic design of gas pipelines and the improvement of seismic capacity of pipelines. Learn from the earthquake resistant and disaster reduction experience of gas networks in countries with frequent earthquakes such as Japan and the United States,as an important part of the gas system’s earthquake prevention and disaster reduction,the earthquake emergency response system has received extensive attention in China. The main difficulty is to determine the earthquake emergency cut-off threshold. The research of earthquake emergency cut-off device is relatively mature. There are many kinds of emergency cut-off devices,such as falling ball type,permanent-magnet type and electric control type,and the corresponding research and development results have been applied. The related research work of earthquake resistance and disaster reduction of gas pipelines in China lacks engineering connection and demonstration,and corresponding system construction lacks standard guidance,resulting in the lack of practical feedback and correction of corresponding research results,which should be emphasized in the next research.