高水压富含水地层盾构盾尾密封装置改进研究——以金陵石化南京长江盾构工程为例

Improvement of Shield Tail Seal Device of Shield in High Water Pressure and Aqueous Stratum——By Taking Nanjing Changjiang Shield Project of Jinling Petrochemical Co. for Example

摘要: 在盾构法隧道穿越工程中，盾尾密封是保证盾构掘进隧道与掘进面完全隔离的关键性控制部位，一旦密封损坏，将会造成盾尾涌水、涌砂，给掘进施工造成困难，甚至直接影响到人员、设备的安全。通过分析以往盾构工程盾尾密封装置，针对高水压富含水、地层松散、流动性强的粉细砂岩层，研究出一套行之有效的盾尾密封装置，有效地解决了盾尾密封涌水、涌砂问题。

Abstract: In tunnel crossing project using shield method, shield tail seal was the key position for guaranteeing the shield tunnel excavation and complete isolation of excavation face. Once the seal was damaged, it would cause water and sand gushing from the shield tail, induce a difficulty for construction, and even directly affect the safety of personnel and equipment. In this paper, through the analysis of previous engineering of shield tail seal, aimed at high pressure and high water content, loose formation and silty sand layer with high fluidity, a set of effective shield tail seal device is developed. The device is applied to effectively solve the problem of water and sand gushing from the shield sealing.