CSR shield machine creates driving records in Henan

Recently, the No. 1 shield machine manufactured by CSR ran through the right tunnel in the 01 section of Zhengzhou Subway Line 1. During the period, the daily and monthly driving speed of the machine soared to 31.5m and 603m respectively, creating new driving records of subway shield machines in Henan.

With complex geological conditions, Zhengzhou is in a non-self-weight collapsible loess area. There are high-rise buildings, railway lines and main roads in the construction section of the subway tunnel. Aiming at these characteristics, CSR Chengdu Tunnel Equipment Co., Ltd. elaborately built two EPB shield machines with an excavation diameter of 6.

17m, a total weight of about 450t and a length of about 75m, which integrate optical, mechanical, electrical, hydraulic and sensory technologies. The No. 1 shield machine was delivered to China Railway 11th Bureau Group Co., Ltd. CR11G on September 15, 2010, and was put into the construction of the right tunnel in the 01 section of Zhengzhou Subway Line 1 on September 28.

This March 6, the machine ran through the right one-way 2,044.5-meter tunnel, creating a daily and monthly driving record of 31.5m and 603m. This is a new driving record created by CSR shield machines in different geological conditions after the previous one in Sichuan last June.

According to the project manager of CR11G, the No. 1 shield machine was in good conditions when arriving at the receiving station, with both horizontal and vertical errors under 1cm, up to the optimal standards of shield machines. He evaluated CSR shield machines as most rational in design, most convenient in use and most normal in driving .