济南新地铁线于2025年12月27日开通,通过保险措施,在岩泉上行驶,帮助岩泉达到自1966年以来的最高水平. Jinan’s new subway line opened Dec. 27, 2025, navigating karst springs with safeguards that helped Baotu Spring reach its highest level since 1966.

济南地铁4号线是中国首条穿过岩泉区的地铁线,于2025年12月27日在山东省济南开始运营. Jinan Subway Line 4, China’s first to run through a karst spring area, began operations on December 27, 2025, in Jinan, Shandong Province. 这条线旨在减少交通堵塞和旅行时间,在城市脆弱的喀斯特地质学中航行,同时保护近1 000个天然泉源。 The line, designed to reduce traffic congestion and travel time, navigates the city’s fragile karst geology while protecting nearly 1,000 natural springs. 工程师们为避免含水层而改变线路路线,深化隧道,使用专门的盾牌机器防止地面定居,并安装了U形水分流管道。 Engineers rerouted the line to avoid aquifers, deepened tunnels, used specialized shield machines to prevent ground settlement, and installed U-shaped water diversion channels. 监测显示,Baotu Spring的水位达到30.32米,是1966年以来最高的,表明该项目的环境保护是有效的。 Monitoring shows Baotu Spring reached a water level of 30.32 meters—the highest since 1966—indicating the project’s environmental safeguards are effective.