Recently, according to Xinhua News Agency, China's independent research and development of super-large diameterShield machineThe Keihin Coaxial was officially launched from Shaft 1 of Tunnel 1 of Tianjin Binhai International Airport on the 8th and is expected to be usedKeihin IntercityConstruction of Tunnel 1 under the area of Tianjin Binhai International Airport. The departure of the "Keihin Coaxial" marks the beginning of our country's inShield machineTechnological breakthroughs will not only provide strong support for the development of transportation in the Beijing-Tianjin-Hebei region, but also bring a huge impetus to the technological development of related industries. The following will be on the topicShield machineThe characteristics and construction process are described in detail.
"Keihin Coaxial" is a super-large diameter independently developed by ChinaShield machine, which has the following characteristics: a huge volume with a total length of 135 meters and a total weight of about 2,800 tons: this oneShield machineHuge and solid, it can cope with complex underground environments and ensure the stability and safety of construction. Excavation diameter 138 meters: This is an innovative breakthrough that makes the excavation of the tunnel widerHigh-speed railTwo-line parallelism provides feasibility.
Intelligent control system:Shield machineUsing massive construction data for in-depth Xi, more optimized tunneling control parameters are formed, surface settlement is greatly reduced, and axis control accuracy is improved. Automatic assembly: through the self-developed "six degrees of freedom automatic adjustmentBox culvertAssembleRobotsTo achieve automatic assembly, improve construction efficiency and reduce process errors.
Soil solidification technology: due to the clay soil in the ground, rightShield machineThe construction caused certain difficulties. To this end, the construction party took measures to solidify the soil with special materials. In some sections, the builder will inject a special double-liquid slurry into the formation synchronously, and solidify the soil into a jelly shape in about twenty or thirty seconds to control the surface settlement and ensure the safety of the construction.
Application of intelligent control system in construction:Shield machine"Keihin Coaxial" not only has an advanced intelligent control system, but also can conduct in-depth Xi based on massive construction data to form better tunneling control parameters. Through the monitoring and analysis of settlement and other data in construction, the construction parameters can be adjusted in time, the degree of surface settlement can be reduced, and the accuracy of axis control can be improved to ensure the construction quality.
RobotsApplication of assembly technology:Shield machineFor every 2 meters of tunneling, subsequent trolleys are pavedBox culvertand segments to support the tunnel. In the past, machines assisted in the manual assembly of railwaysBox culvert, multiple workers and a lot of time are required. And now, the tunnel branch of the Keihin Railway Section 4 of the Fourth Bureau of China Railway has passed the self-developed "six degrees of freedom automatic adjustmentBox culvertAssembleRobots", realizedRobotsassembly, greatly improve the assembly efficiency, reduce the assembly error.
Development of intercity railways:Keihin IntercityAs one of the landmark projects in the Beijing-Tianjin-Hebei region, the railway is an important measure to build "Beijing-Tianjin-Hebei on the track". The completion of the railway will further improve the structure of the regional road network, enhance the regional transportation capacity, and promote the coordinated development of Beijing, Tianjin and Hebei.
Leading role in technological innovation: extra-large diameterShield machineThe R&D and application of "Keihin Coaxial" marks China's inShield machineA major breakthrough in the field of technology. This not only enhances China's international competitiveness in the field of large-scale engineering construction, but also plays a positive role in promoting technological innovation and process improvement in related industries.
Extra-large diameterShield machineThe launch of the "Keihin Coaxial" marks the beginning of our countryShield machineA major breakthrough in the field of technology, and will have a positive impact on the transportation construction and technological development of related industries in the Beijing-Tianjin-Hebei region. Through the application of soil solidification and intelligent control technology, the construction process is more stable and saferRobotsThe application of assembly technology has improved the construction efficiency. The achievement of this achievement is not only of great significance to China in the field of large-scale engineering construction, but also lays a solid foundation for future technological innovation and process improvement. I believe that our country is inShield machineContinuous breakthroughs in the field of technology will provide strong support for China's infrastructure construction.