China News Service, August 11 (Mei Yunqiu) The reporter learned from the China Communications Group that the "Canal", a domestically-made largest-diameter cement balanced shield machine developed and manufactured by China, was successfully launched on the 10th, marking Beijing Dongliu Huan (Beijing-Harbin Expressway-Luyuan North Street) reconstruction project has entered the shield tunneling stage.
The reconstruction project of the Beijing East Sixth Ring Road starts from the Jingha Expressway interchange in the south to Luyuan North Street in the north, with a total length of about 16 kilometers, including the direct widening section and the land-entry reconstruction section.
Among them, shield tunnels are the main part of the reconstruction section of the ground. The length of the shield tunnels is about 7.4 kilometers, and the separated double-hole layout is adopted.
CCCC Tunnel Bureau undertook the construction of the fourth tender, which mainly included the excavation and construction tasks of the shield tunnel on the east route and other civil works.
It is reported that the outer diameter of the east route shield tunnel is 15.4 meters, which is currently the largest diameter shield tunnel in mainland China.
The tunnel traverses the core area of Beijing's sub-central city. It needs to traverse or cross multiple roads, tracks and rivers. The shield machine covers an average of more than 20 meters of soil. The deepest part passes through the sub-central station comprehensive hub. The maximum depth is about 59 meters. It is Beijing The deepest underground tunnel.
In order to meet the construction needs of the east line shield tunnel, CCCC Tianhe Machinery Equipment Manufacturing Co., Ltd. has tailored the super-large diameter shield machine "Canal" for the reconstruction project of Beijing East Sixth Ring Road.
According to the relevant person in charge, the “Canal” launched this time consists of a cutter head, a shield body and 5 sets of trolleys. The excavation diameter is 16.07 meters, the length of the machine is 145 meters, and the total weight is about 4,500 tons, creating a domestic shield. The record of the largest excavation diameter of the construction machine.
In addition, the "Canal" adopts the world's first long-distance tunneling without tool change technology independently developed, which can realize continuous tunneling 4800 meters without changing the tool.
The Beijing East Sixth Ring Road Reconstruction Project is a key project in Beijing. After its completion, the 12 planned roads and 5 existing roads in the Beijing City Sub-center will be connected from east to west, which can effectively alleviate the traffic pressure on the East Sixth Ring Road and make Tongzhou City and the sub-center administrative The integration of office areas is of great significance for promoting the coordinated development of transportation in the Beijing-Tianjin-Hebei region, improving the level of transportation services in Beijing, and building a comprehensive transportation system.
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