Recently，The domestic large-diameter multi-support is jointly built by the Railway Construction Heavy Industry and the 14th Bureau of Hydropower.TBM“Plateau Pearl”Successfully launched in the project tunnel。

“Plateau Pearl”Excavation diameter 10.23 meters，The length of the whole machine is about 185 meters.，Total weight about 2,300 tons，The installed power is 8200 kW，The designed maximum tunneling distance can reach more than 20 kilometers.，Detection distance of advanced geological forecast 0-100 meters，It is the first platform for China Railway Construction Heavy Industries to fight on the plateau.“A great power weighs heavily”。

Aim at that specific geological conditions of the plateau，“Plateau Pearl”Provide advance support、Multi-mode tunneling、Rockburst safety protection、Soft rock expansion excavation、Intelligent cruise tunneling、Intelligent construction management、Advanced systems such as man-machine rock risk intelligent early warning，Fully meet the rapid construction of the tunnel、Quality、Efficient、Safe、Environmental protection、Requirements for high integration，In long-distance hard rock、Large burial depth(>1600 meters)、Broken zone、High ground temperature、Rock burst and other complex strata，Achieve security、Dig quickly，It fully demonstrates the application of Railway Construction Heavy Industry in the field of long tunnels with large sections.TBMCore competitiveness of design and manufacturing。

To guarantee“Plateau Pearl”Smooth start，The technical service personnel of China Railway Construction Heavy Industry Co., Ltd. have made great efforts to overcome the adverse effects of high altitude and thin oxygen.，Practice“Chisel the road in every mountain  Bridge in water”The spirit of railway soldiers，Continuous optimization and improvementTBMAssembly plan，Eliminate the influence of various unfavorable conditions and external factors，Only 2 months.，It will be completed safely and smoothly.TBMAssembly and commissioning tasks in the tunnel of the continuous belt conveyor，Fully demonstrated the railway construction workers.“Lack of oxygen without lack of spirit、Hardship speaks for itself”The lofty sentiments and elegant demeanor。

Coming up，Railway Construction Heavy Industry will continue to give full play to its professional and technical advantages.，Sincere service with rich experience，High quality for the project、Provide strong guarantee for safe tunneling。