我国在建最北高铁哈伊高铁全线铺轨贯通

Group 1 - The Hailar-Yichun High-Speed Railway (Ha-I High-Speed Railway) has completed its track-laying, marking a significant milestone in China's "14th Five-Year Plan" key projects [1] - The railway is an important extension of the "eight vertical and eight horizontal" high-speed rail network, specifically the Beijing-Harbin and Beijing-Hong Kong-Macau corridors [1] - The project faced various construction challenges, including the distribution of island-like permafrost and a short effective construction period due to extreme weather conditions [1] Group 2 - The construction utilized advanced group sleeper laying technology, achieving an average daily track-laying progress of 2.5 kilometers, which is a 50% efficiency improvement over traditional methods [1] - The project incorporated information technology and intelligent management techniques, enabling remote real-time monitoring of key equipment to ensure operational safety [1] - The next phase of the project will focus on fine-tuning the track, electrical systems, and testing, which is expected to enhance the high-speed rail network in Northeast China and promote regional economic development [2]