Core Viewpoint - The construction of the Jinan Metro Line 9 is progressing rapidly, with significant milestones achieved, including the completion of the main structure of the Huashandong Road Station, marking a transition to the auxiliary structure phase [3][10]. Group 1: Project Overview - The Jinan Metro Line 9 spans 15.7 kilometers, connecting 12 underground stations from Huanghe South Station to Maozhuang Station, enhancing urban connectivity and travel efficiency [9]. - The Huashandong Road Station features a two-level underground island platform, measuring 294.6 meters in length, constructed using an open-cut method [6]. Group 2: Construction Techniques and Innovations - The construction team employed innovative techniques to address challenges such as low winter efficiency and water-rich soil, utilizing a combination of "bored pile + jet grouting pile" for water barrier construction [6]. - To reinforce the soil in the 197-meter backfill area, sleeve valve grouting technology was applied, along with the installation of steel supports, ensuring construction safety through a "double insurance" strategy [6]. Group 3: Environmental Considerations - The construction team is committed to green development, optimizing construction schedules to minimize nighttime work and implementing measures to reduce noise pollution and dust [8]. Group 4: Future Implications - The completion of Line 9 is expected to significantly improve travel efficiency for citizens and stimulate development in key areas such as Huashan and Xindong stations, contributing to the high-quality growth of Jinan [9][10].