假期“不打烊” 这些大工程跑出建设“加速度”

Group 1: Hangzhou Bay Cross-Sea Railway Bridge - The Hangzhou Bay Cross-Sea Railway Bridge is a key project of the Tongsu-Jia-Ning High-Speed Railway, which is part of the national "eight vertical and eight horizontal" railway network, connecting four cities in the Yangtze River Delta [1] - The bridge spans 29.2 kilometers and consists of three main navigation bridges and several approach bridges [3] - As of now, approximately 50% of the construction progress has been completed, with 441 marine piers under varying degrees of construction [5] - The construction faces challenges due to the wide sea area, strong winds, and soft sediment at the bottom, necessitating careful planning for material transport based on tidal conditions [7] - A tidal dynamic database has been established to optimize marine transport and construction schedules [9] - To ensure zero delays in material supply, three transport devices have been set up to provide uninterrupted raw materials for concrete production [11] - The bridge is expected to be completed and operational by the end of 2027, improving travel convenience for residents along the route [13] Group 2: Harbin to Yichun High-Speed Railway - The Harbin to Yichun High-Speed Railway (Hayi High-Speed Railway) is an extension of the Beijing-Harbin to Beijing-Hong Kong-Macau corridor and is the highest latitude high-speed railway being constructed in China, traversing permafrost regions [1] - The railway consists of two segments: Harbin to Tieli and Tieli to Yichun, with track laying nearing completion on the Tieli to Yichun segment [1][19] - The construction of the bridge at Anbang River is being carried out using advanced machinery, allowing for the installation of a 32-meter long, 750-ton box girder in about 40 minutes [15] - The main challenge in construction is the pile foundation work, which must contend with low winter temperatures and a short effective working period [17] - High standards for material testing have been implemented to ensure quality, with real-time data recording in a high-standard, information-based laboratory [19] - The total length of the Hayi High-Speed Railway is 318 kilometers, with a design speed of 250 kilometers per hour; the Tieli to Yichun segment is expected to be completed by mid-August, and the Harbin to Tieli segment by the end of August [19] - Once completed, travel time for passengers between Harbin and Yichun will be reduced from 7 hours to approximately 2 hours [23]