China Railway Tunnel Group (CTG) is the largest enterprise group in the field of tunnel and underground engineering in China, which integrates four functions: survey and design, building construction, scientific research and development, and mechanical repair.
1965, Shanghai Tunnel Engineering Company was established, becoming the earliest engineering construction unit in China to carry out shield tunnel test and engineering application. From August 1965 to September 1970, the first river-crossing tunnel in China, Shanghai Dapu Road Tunnel, was completed. Self-developed φ 10.2 m grating extrusion shield was used to excavate 1322m at the bottom of Huangpu River. Combined with the four key technologies developed by the project, such as shield tunnel, tunnel lining and continuous caisson, 65438+ was obtained.
China Construction No.5 Tunnel Company is a professional company under China Construction No.5 Engineering Bureau Co., Ltd., a member of China State Construction Engineering Corporation, a fortune 500 enterprise in the world, with its headquarters in Chongqing. The company is mainly engaged in tunnel engineering, rail transit engineering, railway engineering, highway engineering, municipal engineering and other construction business, and its business is mainly distributed in Chongqing, Guizhou, Sichuan, Shanxi, Shenzhen, Liaoning and other regions.