浅埋隧道中隔墙施工技术

Construction Technology of Partition Shallow Buried Tunnel

应用广泛的浅埋连拱隧道中隔墙先行实施技术,是隧道成功实施的先决条件。阆中东山隧道地质以软质岩为主,易出现基础承载力不足、侧壁坍塌,在中隔墙实施过程中,掘进采用光面爆破技术、基础注浆锚杆、墙顶空隙注浆、型钢花架支撑防止偏压等针对性措施,使中隔墙顺利实施,为隧道正洞掘进创造了条件。

The partition technology in shallow buried multi arch tunnel is the prerequisite for the successful implementation of the tunnel. Dongshan tunnel in Langzhong, soft rock based, is victim to weak foundation bearing capacity and lateral wall collapse, so in the partition walls implementation process, smooth blasting excavation technology, foundation grouting bolt, void grouting in wall top, steel flower support for anti-bias are adopted to guaran- tee the smooth implementation of septal wall for tunnel excavation.