七步台阶开挖法在邵家隧道塌方处理中的运用

The Use of Seven-step Bench Excavation Method in the Treatment of Shaojia Tunnel Collapse

甬台温铁路邵家隧道,在施工至离洞口134m处发生了塌方。在确保施工安全的前提下,采用了小导管注浆加固和七步台阶法开挖的方式对塌体进行了处理,并安全顺利的通过了塌方段。

Shaojia tunnel of Yongtaiwen railway took place collapse in the construction from the hole 134m.In the premise of ensuring safe construction,it used small tube grouting and seven-step bench excavation method to deal with the collapse body and passed the safe cave section smoothly.