关键词: 盾构再制造, 隧道穿越, 切割桥桩, 适应性

Abstract: On the background of Beijing Metro Line 12, the engineering adaptability of shield tunneling undercrossed Xiba River Bridge is studied in this paper. The boring machine used for tunneling is re-manufactured and the adaptability of the machine is discussed by analyzing the difficulties and the refit requirement about cutting piles of individual systems of cutting, thrust and mud discharge.The results of the research indicate that, 1). the performance of working face in cutting the plie foundation of the road bridge is enhanced when the modification on the sectors such as material of cutting head, open ratio, cutter placement is made; 2). the torque and thrust of the refit machine meet the requirement for the pile foundation cutting. 3). the conveying screw without any shaft reduces the possibility of the jamming and the capacity, torque and speed of the conveying screw satisfy the discharge expelling. 

Key words:  Shield remanufacturing, undercrossed tunneling, pile cutting; adaptability