1. High-Temperature Medium Compatibility: The thermal pipeline medium reaches 120°C, requiring the lining material to ensure temperature resistance and sealing performance;
2. Crossing High-Speed Rail and Rivers: The section requiring repair crosses the Beijing-Tianjin Intercity High-Speed Railway and an airport drainage river. Due to pipeline seepage, river water and groundwater infiltrated the working pit during construction;
3. Traffic disruption control: The construction zone is located in a residential area, necessitating “zero-excavation” operations to avoid traffic congestion.
1. Reduces construction time by 60% and excavation volume by 80% compared to traditional methods;
2. Increases pressure resistance of repaired pipelines by 45% and thermal efficiency from 15% to 35%;
3. Achieves “zero traffic disruption and zero safety incidents,” setting a benchmark for commercial district pipeline rehabilitation.