Core Points - The successful topping out of the main structure of the Qindao Metro Line 15 project at the Gouchazhan station marks a significant milestone in the construction process, laying a solid foundation for subsequent engineering progress [1] - Gouchazhan station, located in the Chengyang District, is a key node in the Qingdao metro network, playing an important role in improving the urban public transport system and alleviating regional traffic pressure [1] Summary by Sections Construction Progress - The project team has effectively overcome multiple challenges since the start of construction, ensuring steady progress across various phases [1] - The complex hydrogeological conditions at the site, including a fractured rock layer over 60 meters and a 6-8 meter thick water-rich sand layer within an 80-meter range, posed significant challenges [1] - Ground grouting reinforcement measures were implemented to reduce pit risks, and the excavation plan was optimized to ensure safety during construction [1] Monitoring and Safety Measures - The construction faced severe challenges due to the proximity of existing lines, with the nearest point being only 6 meters away [1] - Over a hundred automated monitoring points were established for real-time monitoring, and excavation was conducted in a "middle to outward" sequence to minimize vibrations [1] Resource Management and Quality Control - Increased resource investment and optimized construction scheduling allowed for the completion of the complex structure in just two and a half months [2] - The project team implemented strict control over concrete raw materials, mix ratios, and construction processes to meet high-performance concrete standards [2] - The application of the "2345" work method and "small legislation + secondary distribution" mechanism effectively motivated teams and improved processes, avoiding quality issues [2] Future Plans - The project team aims to strengthen safety and quality control, refine construction process management, and maintain high standards in the ongoing work to contribute to the development of a first-class metro system [2]