Shield is the special one for soft ground tunnel construction, among which the EPB (Earth Pressure Balance) shield is a newly developed advanced shield machine in recent 30 years, and it is suitable for various kinds of ground from soft clay to gravel.

• 盾构是软土地基隧道施工的专用设备,其中土压平衡系盾构是近30年来发展起来的一种技术先进的新型盾构机械,能适应从软弱粘性土到砂砾土范围内各种地层的隧道施工。