日前,世界最大断面的“阳明号”类矩形盾构机在浙江宁波轨道交通3号线出入段破土而出,标志着国内第一条城市轨道交通类矩形盾构隧道顺利贯通,这也是目前世界上最大断面的类矩形盾构隧道。据了解,“阳明号”类矩形盾构机重达720吨,总长约59米,形状接近长方形,与一般圆形盾构机前面只有一个大刀盘不同,“阳明号”头部切削装置由两个X型大刀盘和1个 Recently, the world’s largest section of the “Yang Ming number” type rectangular shield machine in Ningbo, Zhejiang Metro Line 3 out of the entrance and exit broke out, marking the first domestic urban rail transit rectangular shield tunnel smoothly, which It is also the quasi-rectangular shield tunnel with the largest section in the world. It is understood that “Yang Ming number ” type rectangular shield weighing 720 tons, a total length of about 59 meters, the shape is close to the rectangle, and the general circular shield machine in front of only a large cutter, "Yang Ming number Head cutting device consists of two X-type cutterhead and a