公路连拱隧道中隔墙顶部回填方法及控制要点

摘要

中隔墙是整个连拱隧道结构稳定的关键，是连拱隧道最重要的结构体，它对围岩的支撑稳定具有非常重要的作用。连拱隧道中隔墙施工，特别是中隔墙顶部回填是整个中隔墙施工中重要的环节之一，直接关系到整个隧道的受力安全，在实际施工中回填质量容易被忽视。本文结合实例介绍中隔墙顶部回填方法及控制要点，为类似工程提供参考。%The middle wall is the key of the multi-arch tunnel structure stability, and the most important structure of multi-arch tunnel. It is very important for the stability of the surrounding rock. Multi-arch tunnel middle wall construction, especially the middle wall top backfilling is an important link in the whole process of the middle wall construction, directly affecting the safety the stress of the tunnel. The backfilling quality is easily neglected in actual construction. This paper introduces the middle wall top backfilling methods and control points, to provide the reference for similar projects.