高承压水头土压平衡盾构水下接收技术

Underwater Receiving Technology of EPB Shield with High Pressure Water Head

为确保土压平衡盾构在35m高承压水头、上覆砂层厚达28m条件下安全接收,依托武汉大东湖核心区污水传输系统工程,对改进后盾构水下接收技术结合端头加固及降水技术进行研究。经过严密的施工组织设计,工程两个高承压水头接收条件区间均成功完成水下接收,接收井内无涌砂,沉降控制良好。

In order to ensure the safe acceptance of EPB shield under the condition of 35-meter-high pressure water head and 28-meter-thick overlying sand layer,based on the Wuhan East Lake Deep Tunnel Engineering,the improved underwater receiving technology combined with end reinforcement and dewatering technology is studied. After rigorous construction organization design,two receiving of the project with condition sections of high pressure water head have successfully completed underwater receiving,no sand gushing in the receiving well,and settlement is under control.