泥水盾构泥浆潜水带压进舱作业技术研究

摘要

Currently, for shield construction under complicated geological conditions, hyperbaric intervention is an important way to solve the problems of shield cutters. In this paper, the technology of hyperbaric intervention with diving in slurry is analyzed and studied regarding the problem of excavation face instability and collapse ex-perienced in the process of hyperbaric intervention in the Nanjing Weisan Road river-crossing tunnel N. Face support with slurry pressure under normal excavation conditions and the saturation diving technique are used to-gether to carry out cutter tool replacement, so problems regarding hyperbaric intervention can be solved in cases where supporting the working face with compressed air is impossible.%对于复杂地质条件下的盾构施工，带压进舱作业是目前解决盾构刀盘刀具问题的重要手段。文章针对南京纬三路过江通道工程N线隧道带压进舱作业期间开挖面失稳坍塌问题，研究分析了泥浆潜水带压进舱作业技术。通过采用正常掘进状态下泥水压力平衡开挖面水土压力的方式以及饱和潜水技术，解决了泥水盾构在无法实现空气支护隧道开挖面条件下的带压进舱作业难题，顺利完成了2把滚刀的更换作业。