Shield machine "Barbara" after rebirth, put into work       

Shield machine "Barbara" was introduced from Germany in 2002 the first domestic subway tunneling shield machine, by 2013, the total mileage of 12 kilometers total excavation. And its design life is 10 kilometers. After it was reinvented, it was reborn and able to work happily.

Shield machine "Barbara" after rebirth, put into work

"Barbara" is purchased by Beijing construction engineering and civil engineering company in order to complete the construction task of the 17 bid section of Beijing Metro Line 5. The shield machine that used to shield metro lines 5, 7 and No. 15 ended the "extended service" career in 2013. Recently, the author learned that, after more than a year of "reengineering" work, reinstall the "Barbara" has passed the acceptance, will be on the subway line 16 again.

From East four station to Dongdan station, "Barbara" quietly driving 2839.2 meters, the settlement is controlled within 5 millimeters. In the Beijing Metro Line T2 branch line project, it created 606 ring / month, 727 meters / month, the highest single day driving 35 ring / day, 42 meters / day good results, breaking the national shield construction one-day, single month driving record. In the subsequent career, "Barbara" silently in Beijing metro line 15, Beijing Metro Line 7 excavation, the ultimate service life reached the limit.

Do you say goodbye to "Barbara"? In September 2013, the fate of "Barbara" appeared a new dawn. Under the auspices of the Beijing Shield Engineering Association, Beijing construction and civil engineering company began to cooperate with the The Academy of Armored Forces Engineering and other cooperative units to carry out the research and development of shield remanufacturing. Through research and demonstration, they put forward the "Barbara" whole machine remanufacturing scheme, start the shield machine remanufacturing work.

More than a year's time, Beijing construction engineering company of civil "Barbara" made a "major operation": it has the "heart" was replaced, the hydraulic system of the shield machine was commissioned by the German Rexroth remanufacturing; while its bones are strengthened, scratch on the cylinder the thrust cylinder was repaired by pulse welding and nano electro brush plating technology; the electrical control system also do the upgrade, and the production of the components has done upgrading. Finally, "Barbara" by re manufacturing, re Hwan rebirth. After acceptance, it will be put into the construction of Beijing Metro Line 16.

According to Beijing construction and civil engineering company shield center director Shuai Yubing introduced: after remanufacturing, "Barbara" performance can be as new as the shield machine, and compared with the new machine, remanufacturing shield machine can save cost 50%, energy saving 60%, saving material 70%.

The shield machine "Barbara" has contributed a lot to the subway industry of our country, and now it will be full of our good wishes for the new life, once again join in the modernization career, with hard work to repay us.