汶川8.0级地震都江堰市天然气系统震害分析及救灾过程

Seismic Damage Investigation and Relief Procedures of Natural Gas System in Dujiangyan City in M8. 0 Wenchuan Earthquake

四川都江堰市地处龙门山主山前边界大断裂上,在汶川8.0级地震烈度分布图中属于Ⅸ度区,是地震受灾最严重的城市之一。作为城市生命线的天然气供应链在本次地震中遭遇了一定的破坏。通过对都江堰市天然气系统的基本构成、震害情况以及应急救灾过程等的调查与整理,对都江堰燃气系统中门站、CNG加气站、中压配气管网及低压配气支管各组成部分在地震中的震害情况进行了分析,对震后的应急处置措施、供气恢复策略及灾后重建工作进行了综述,总结了汶川地震中都江堰天然气系统的应灾经验及救灾环节中的不足之处,并就如何提高燃气系统的抗震应灾能力提出建议。

The city of Dujiangyan is located on the frontal part of Longmenshan fault zone,which belongs to Ⅸ area in the seismic intensity distribution of M8.0 Wenchuan earthquake and it is one of the most seriously damaged cities. As an urban lifeline,the natural gas supply chain of the city has suffered a certain amount of damage. Based on investigation and analysis of collected data of basic composition of the natural gas system,state of earthquake damage as well as emergency disaster relief in the city,seismic damages in the earthquake to the gas distribution stations,compressed natural gas （ CNG） filling stations,middle-pressure distribution pipelines,and low-pressure pipelines are analyzed. The post-earthquake emergency measures,the gas recovery strategy,and the post-disaster reconstructions are reviewed. As a result,experience in the disaster response and lessons learned from the disaster relief are summarized and some suggestions to improve the earthquake-resistance abilities of natural gas system are given as well.