Core Points - The construction of the 108 New Line Expressway's sixth section has reached a significant milestone, with a cumulative excavation of 2,500 meters, marking over half of the total excavation completed [2] - The sixth section spans 5.21 kilometers and traverses complex geological and ecological areas, recognized as a challenging segment of the entire project [2] - The project is crucial for emergency response in the western mountainous regions of Beijing, especially after severe damage from extreme rainfall [3] Summary by Sections Construction Progress - Three tunnels are advancing simultaneously, with the completion of the left and right tunnel portals of the 1,700-meter-long Tanmugang Tunnel, which has achieved nearly 60% of its total excavation [2] - The construction team has implemented strategies to address challenges such as broken slate and water seepage, ensuring steady progress [3] Bridge Engineering - The construction of the Tanmugang Bridge's pier columns has reached a completion rate of 96%, while the North Port Special Bridge has successfully erected eight spans of beam slabs [3] - The U-turn ramp bridge completed all cast-in-place box girder pouring within nine days and has transitioned to upper structure construction [3] Importance of the Project - The 108 New Line Expressway is designated as a "lifeline" for the western region, enhancing disaster resilience and forming a dual-use transportation guarantee system [3] - The completion of this expressway will integrate with other highways to create three main horizontal emergency communication routes [3]

Core Points - The construction of the 108 New Line Expressway is progressing well, with a significant milestone achieved as 2,500 meters of tunnel excavation has been completed, marking over half of the total excavation [1][3] - The project is crucial for emergency response in the western mountainous areas of Beijing, especially after severe damage from extreme rainfall [7] Group 1: Project Overview - The 6th section of the 108 New Line Expressway spans 5.21 kilometers, starting from the west side of the Yanhe Road interchange and passing through several towns before reaching the Beijing-Hebei border [3] - This section is recognized as the most challenging due to its complex geology and strict ecological protection requirements [3] Group 2: Construction Progress - Three tunnels are being excavated simultaneously, with the Danmugang Tunnel's left and right openings completed, and the North Port Ditch Tunnel excavation reaching 646 meters [3][5] - The construction team has adopted strategies to manage challenges such as loose rock and water ingress, including advanced forecasting and drainage techniques [5] Group 3: Importance of the Project - The 108 New Line Expressway is part of a broader network aimed at enhancing disaster resilience in the region, forming a vital transportation link for emergency situations [7] - The project is expected to improve the overall transportation system in the mountainous areas, providing both regular and emergency access [7]

Core Insights - During the "14th Five-Year Plan" period, Beijing has completed the construction of 191.6 kilometers of expressways and 35.4 kilometers of urban expressways, with traffic volume exceeding 3.493 billion vehicles [1][2] - The upcoming "15th Five-Year Plan" will focus on the construction of several key expressway projects, including the 108 New Line Expressway and the second and third phases of the Jingmi Expressway [1][3] Infrastructure Development - The East Sixth Ring Road renovation project aims to enhance the traffic network of the urban sub-center through above-ground widening and underground modifications [1] - The Jingha Expressway (East Fifth Ring - East Sixth Ring) expansion will increase the mainline from six to eight lanes, significantly improving traffic capacity [1][3] - New expressways such as the Daxing Airport North Line and the Jingxiong Expressway have been completed, connecting key areas like Daxing Airport and Xiong'an New Area [1] Urban Rapid Transit - Five new urban rapid transit roads were opened during the "14th Five-Year Plan," including the Guangqu Road East Extension, which creates a dual-layer system for efficient transportation between the city center and sub-center [2] - The company has implemented smart highway initiatives, completing the intelligent transformation of 356 lanes and developing a digital twin highway for better management [2] Maintenance and Safety - Over 3.4 billion yuan has been invested in road maintenance, with 462.2 million square meters of road surface projects completed, maintaining high performance levels [3] - The company has developed smart inspection vehicles and established emergency response points to ensure smooth traffic flow during holidays [3] Low-Carbon Initiatives - The company is advancing the construction of new energy facilities at service areas, including charging stations and hydrogen stations, contributing to a low-carbon transportation system [3] - Six supercharging stations have been put into operation, providing convenient charging options for citizens [3]

Core Viewpoint - The construction of the 108 New Line Expressway is progressing rapidly, showcasing the technical skills and perseverance of the builders, with significant advancements in tunnel and bridge construction [3][4]. Group 1: Project Progress - The construction site of the 108 New Line Expressway is bustling with activity, featuring nearly 400 workers and around 60 large machinery operating continuously [3]. - The Niujiao Hu Tunnel has surpassed the 1,000-meter excavation milestone, with workers operating in two shifts, 24 hours a day [3]. - The Hougang Tunnel, part of the project, has achieved over 700 meters of excavation, highlighting its importance as a key engineering component [4]. Group 2: Engineering Challenges - The Hougang Tunnel, measuring approximately 4.2 kilometers, faces challenges due to its location in a steep mountainous area, with a maximum height of 45 meters above ground [4]. - The project team is implementing strict process control to ensure safety and quality during construction, particularly in areas with lower rock strength [4][5]. Group 3: Infrastructure Development - The 108 New Line Expressway is designed not only as a transportation route but also to enhance disaster resilience and network flexibility in the western mountainous region [4]. - The project will facilitate better connectivity for local communities and promote ecological tourism, contributing to the green economy in the Beijing-West region [4].