小间距浅埋地铁隧道下穿人行天桥施工技术

Construction technology for shallow subway tunnels with small spacing under pedestrian bridge

在深圳地铁一号线侨城东-华侨城区间暗挖隧道施工中，人行天桥基础采用钢管桩托换加固，洞内超前预加固、微震控制爆破、小间距岩柱加固以及信息化施工等综合施工技术，顺利穿越了人行天桥，保证了天桥的安全和施工的顺利进行。

Taking intersection tunnel work from Qiaochengdong to Huanqiaocheng in the No.1 line of Shenzhen subway as example in order to ensure the construction of shallow subway tunnels with small spacing which under pastas pedestrian bridge underpinning reinforcement with steel pipe, advanced pre-strengthening technology, controlled blasting with micro vibration, information construction and other techniques are introduced, which ensured the safety and satisfied completion of construction.