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]

Core Points - The Harbin-Yichun high-speed railway (Ha-I high-speed railway) has completed its full track laying, paving the way for subsequent debugging and testing [1][3] - This railway is a significant extension of China's "eight vertical and eight horizontal" high-speed rail network, specifically the Beijing-Harbin and Beijing-Hong Kong-Macau corridors [1] - It is notable for being the highest latitude high-speed railway under construction in China, with the largest annual temperature difference and the first to traverse an island-like permafrost area [1] Summary by Sections - **Construction Progress** - The Ha-I high-speed railway began track laying on May 28, 2024, with an average daily progress of 2.5 kilometers, which is a 50% increase in efficiency compared to traditional methods [3] - The project has utilized information technology and intelligent management systems for real-time monitoring of key equipment [3] - **Future Development** - The next phases will focus on fine-tuning the track, completing the "four electrical" projects, and conducting joint debugging and testing [3] - **Economic Impact** - Once completed, the Ha-I high-speed railway will enhance the high-speed rail network structure in Northeast China, playing a crucial role in promoting regional economic and social development [3]

人民财讯11月25日电，哈尔滨至伊春高铁是我国"八纵八横"高铁网京哈至京港澳通道的延长线，是"十 四五"重点规划项目。11月25日，在绥化市庆安县，随着最后一段25米钢轨人工铺设完成，哈伊高铁全 线铺轨贯通。下一步，哈伊高铁将转入线路精调、电务工程施工和联调联试阶段。全线通车后，哈尔滨 至伊春的旅客列车运行时间，将从现在的7小时左右大幅缩短至2小时左右。 （文章来源：央视新闻） ...

Core Viewpoint - The construction of the Harbin-Yichun High-Speed Railway (Ha-I Railway) is progressing rapidly, with significant advancements made during the recent holiday period, highlighting the commitment to infrastructure development in China. Group 1: Project Overview - The Ha-I Railway is an extension of China's high-speed rail network, specifically the Jingha to Jinggang'ao corridor, and is notable for being the highest latitude railway that traverses permafrost regions [1] - The railway spans a total length of 318 kilometers, with a design speed of 250 kilometers per hour, significantly reducing travel time from Harbin to Yichun from approximately 7 hours to about 2 hours upon completion [16] Group 2: Construction Progress - During the National Day holiday, it is expected that 40 kilometers of track will be laid, achieving 35% of the total track-laying task [15] - The track-laying process involves advanced machinery, with a single track-laying machine capable of laying at least 2.5 kilometers of steel rail in one day [5] Group 3: Technical Innovations - The railway utilizes seamless rail technology, which enhances track smoothness, safety, and passenger comfort by eliminating the noise associated with traditional rail joints [9] - The construction process includes the use of specialized machinery for ballast placement and track alignment, ensuring optimal track conditions [13] Group 4: Regional Impact - Currently, 8 out of 13 prefecture-level cities in Heilongjiang Province have operational high-speed rail services, with a total operational mileage exceeding 1,400 kilometers, indicating a shift towards more accessible rail transport [18]

Core Viewpoint - The construction of the Harbin-Yichun High-Speed Railway (Ha-I High-Speed Railway) is a significant project in China's high-speed rail network, enhancing connectivity in the northern region and expected to greatly reduce travel time for passengers [1]. Group 1: Project Overview - The Ha-I High-Speed Railway is part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, extending from the Beijing-Harbin to the Beijing-Guangzhou corridor [1]. - The railway is currently under construction, with the Harbin to Tieli section undergoing track laying [1]. - The total length of the railway is 318 kilometers, with a designed speed of 250 kilometers per hour [1]. Group 2: Construction Progress - As of now, track laying is in progress, with 500-meter long steel rails being laid and secured by workers [1]. - The construction involves the use of specialized machinery, such as rail laying machines and ballast cars, to ensure precision and efficiency in the process [1]. - The project commenced in October 2021 and is expected to be completed and operational by next year [1]. Group 3: Impact on Travel - Once completed, the travel time from Harbin to Yichun will be reduced from approximately 7 hours to around 2 hours [1]. - The railway will also connect with the existing high-speed rail network in Heilongjiang Province, enhancing travel options for passengers [1].

Core Insights - The article highlights the significance of railway construction in Northeast China, particularly focusing on the challenges posed by permafrost and extreme weather conditions, and the innovative techniques employed to address these issues [1][5]. Group 1: Railway Construction Challenges - The Harbin-Yichun High-Speed Railway (Ha-I High-Speed Railway) is the northernmost high-speed railway under construction in China, designed to traverse areas with permafrost, where temperatures can drop to as low as -40°C [5]. - The construction of railways in permafrost regions faces two major challenges: frost heave and thaw settlement, which can lead to significant structural issues [9]. Group 2: Role of Engineering Testers - Engineering testers play a crucial role in ensuring the quality of railway projects, responsible for geological surveys and comprehensive quality control throughout the construction process, earning them the title of "railway guardians" [5][9]. - The work of engineering testers involves not only physical labor in challenging environments but also requires advanced professional knowledge to assess soil conditions and determine appropriate construction materials [9]. Group 3: Innovative Techniques - Concrete rebound testing is utilized to estimate the strength of concrete by measuring the rebound distance of a hammer after striking the surface, which serves as an indicator related to its strength [7]. - After extensive testing, results can guide workers in selecting the type of fill material for the roadbed based on the moisture content of the permafrost, ensuring the durability and quality of the high-speed railway [9].