In recent years,the use of soil pressure balancing shield machine to penetrate existing river is an important direction of research and exploration of soil pressure balancing shield machine technology.Based on the engineering practice of the shield section of the Ningwu Railway reconstruction project,this paper describes in detail the technical problems encountered by large diameter soil pressure balancing shield machine to penetrate extremely shallow soil covered river,and gives adaptive river reinforcement solutions and targeted measures.The research shows that strengthening cofferdams in batches and steps is the key technical measure to ensure safe and efficient crossing of river by shield.It is necessary to adjust the excavation parameters in time when the large-diameter earth pressure shield underpasses the river,and the relevant treatment measures can provide reference for this kind of project.
关键词
大直径盾构/土压平衡盾构/超浅覆土/下穿河道
Key words
large diameter shield/earth pressure balance shield/ultra-shallow soil cover/underpass channel
维普
万方数据