（来源：工人日报） "三线齐发，济南迈入大地铁时代！"今天上午10时15分，济南地铁4、8号线和6号线东段同时开通运 营，这标志着济南这座GDP万亿之城的轨道交通线网规模达到了248公里。 从2015年开工到2019年首条线路通车，济南在全国地铁城市里算是"后起之秀"。从47.7公里至248公 里，6年多轨道交通里程增长近5倍。济南地铁"织线成网"，上演了一场精彩的"逆袭战"。 在这场事关济南人精气神的"逆袭战"中，地铁建设工人发挥了极为重要的作用，为工程优质高效推进发 挥了"工力量"。 轨道交通建设工地既是施工主战场，也是思想政治引领的前沿阵地。济南轨道交通集团工会创新采 用"工地课堂+一线故事"模式，让党的创新理论、安全发展理念、强省会建设蓝图"飞入寻常工地"。 "大家知道，咱们济南有1000多处泉水，地下泉脉密布，被称为'泉城'。让地铁与泉水共生，是济南地 铁建设过程中面临的首要难题。地铁不修不行，泉水也都得得到保护！"2025年以来，以济南轨道交通 集团建投公司职工芦潇为代表的宣讲团成员，避开施工高峰，将近20场宣讲搬到4号线、6号线、8号线 项目部的党员活动室、工友驿站。他们用通俗语言解读政策，更用 ...

Core Viewpoint - The construction of the Jinan Metro lines is facing challenges due to the need to protect the city's abundant underground springs while ensuring the metro's operational efficiency [2][3][4]. Group 1: Metro Construction and Environmental Impact - Jinan, known as the "Spring City," has over 1,000 springs, making the integration of metro construction with spring protection a primary challenge [2]. - The Shandong Provincial Geological Bureau's 801 Team has conducted preliminary investigations and environmental impact assessments for the metro lines, addressing critical questions about suitable construction areas and potential impacts on spring water [2][3]. Group 2: Advanced Geological Survey Techniques - The 801 Team proposed high-precision geological survey techniques to accurately map the underground spring networks, akin to a detailed ultrasound of the water flow channels [3]. - During the planning of metro routes and stations, monitoring of sensitive spring water levels is essential, ensuring that construction does not exceed a safe distance of 2 to 3 meters from the highest water levels [3]. Group 3: Innovative Water Management Technologies - The team has implemented groundwater diversion technology during the construction of the metro, allowing underground water to flow around the metro tunnels using a "U-shaped pipe" principle [3]. - Techniques such as "original water, original position, same layer, same quality, same quantity" are employed to maintain groundwater levels within ±10 cm [3]. Group 4: Long-term Spring Protection Strategies - The 801 Team has developed a spring protection model focusing on "regulating, storing, supplementing sources, and conserving" to ensure the sustainability of the Baotu Spring for over 22 years [4]. - A self-developed groundwater monitoring platform integrates 213 monitoring points, enabling early warnings of water level fluctuations and visualizing groundwater movement [4].