Featuring a 221-meter curved vault with a 25.2-meter span, the arched design of Chengdu's first pillar-free subway station on Line 13 maximizes interior space and ensures balanced structural force distribution.The line will play a key role in establishing Chengdu's core rail network.(Photo/China Youth Daily)

#ChinaMetro #Infrastructure #Chengdu

By Fu Rui, Zhang Weiyi(intern) and Wang Zhiyuan/China Youth Daily

来源：中国青年报客户端