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The maximum slurry air pressure balanced composite tunnelling machine leaves the factory

the maximum slurry air pressure balanced composite tunnelling machine leaves the factory

2011- so cleaning after each use is very critical. Information on China's construction machinery

Guide: on December 25, the At present, Tianhe No. 1, the world's largest mud water air pressure balanced compound tunnel boring machine, has been officially accepted and handed over. It will soon be put into the construction of the Yangtze River Tunnel on Weisan road in Nanjing, Jiangsu Province

on December 25, the Tianhe-1, the world's largest mud water pressure balanced composite tunnel boring machine developed by the holding company of CCCC Tianjin Waterway Bureau, a local enterprise in Tianjin, was officially accepted and handed over. It will soon be put into the construction of the Weisan road tunnel across the Yangtze River in Nanjing, Jiangsu Province

the excavation diameter of "Tianhe-1" is up to 15m, gathering the mature cutting-edge technologies produced by almost all shield machines in the world. The actual water pressure is up to 0.74 MPa, the driving distance is up to 413, and recycled EVA, Poe and polyolefin elastomer can be selected to toughen 5 meters. The geological conditions include sand pebbles with very high quartz content, rock layers with strength up to 120 MPa, and composite clay strata of the Yangtze River Tunnel; Meet the driving speed of 5cm per minute, the rated thrust is 278400 kn, and the maximum daily driving capacity reaches 20m

it is learned that CCCC Tianhe company, located in the high tech Industrial Park of Changshu Economic Development Zone, Jiangsu Province, is a joint venture between CCCC Tianjin Waterway Bureau, known as the "pioneer of China's dredging industry", and Zhonghe Property Co., Ltd. The company is mainly engaged in the design and manufacture of shield machines and full face hard rock tunneling machines (TBM), the manufacture of large grab dredgers, large marine deck machinery and large steel structures, as well as the maintenance, leasing, consulting and technical services of related products; It has an annual capacity of 40 shield machines and 50000 tons of large steel structures, and can manufacture super large shield machines with a diameter of 16 meters

the manufacturing cycle of "Tianhe-1" is only 14 months. In order to do a good job in the R & D and manufacturing of shield machines used for river crossing tunnel construction, CCCC Tianhe has formed a R & D team composed of 55 technicians, set up a technology R & D center, and carried out a number of technical breakthroughs, such as the development of ultra long driving distance cutterhead, the development of axially movable 100mm retractable cutterhead, the development of special segment lifting and handling system for super large tunnel boring machine, and the development of mouth piece lifting system

among them, the development of pushable hob, saturation diving pedestrian brake and video camera system are the first in the world; The development of segment lifting and handling system for super large TBM, propulsion oil cylinder of TBM above 14 meters, super long shield tail brush, etc. are all the first in China. At the same time, the moving driving part drives the cutter head with a total weight of more than 1000 tons to expand and shrink by 100mm, so as to meet the tool replacement space during the tool change operation under pressure and greatly shorten the tool change time. This technology is also the first time that it is used on the super large diameter tunnel boring machine with flat packaging bags

it is reported that since the trial operation in April this year, CCCC Tianhe has successfully completed the manufacturing and delivery of a number of shield machines, such as the 8.28m diameter shield machine for Qinshan nuclear power station, the 6.14m diameter shield machine for Beijing Metro, and the shield machine for the first double line through tunnel of Hangzhou Metro. The customer has given a good evaluation. The next generation of the latest shield machine for Shanghai Metro produced by CCCC Tianhe has a construction depth of 45 meters and is used to excavate a tunnel with an outer diameter of 6.6 meters. Compared with the shield machine that has been put into use, the shield machine has the characteristics of fast construction speed, good settlement control and strong adaptability

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