盾构洞内长期停滞施工技术

Construction Technology Inside the Tunnel of The Extended Outage Shield

穗莞深城际轨道虎虎区间两台盾构机受影响需要长时间停滞在上土下岩段,工程施工过程中,通过合理选择停滞位置,对停滞位置地层结合场地情况、设备情况进行加固,微掘进保压,注浆防困,监控量测等技术,安全度过了长达420 d的停滞期,盾构机顺利到达,值得轨道交通领域相关类似工程借鉴。

In the shield tunnel between Humen Station and Humen trade city station of Guangzhou-Dongguan-Shenzhen Intercity Rail, there are two shield machines standing in the upper-soft lower-hard ground for a long time. According to this situation, some measures are taken in this paper, include selecting a rational stopping location, ground strengthening of the shield stopping location,pressure maintaining through the tiny tunneling, grouting, and the tunneling monitoring measurement technology. These thus have a good practical effect on promoting the smooth arrival of shield, and also assure the safety of construction in this situation. The technology can be for reference to the similar railway traffic project.