特长特大导流洞洞室快速施工技术研究

Study on Rapid Construction of Cavern inside Extra Long and Super Large Diversion Tunnel

导流洞地质条件复杂、施工难度高、工程量大、质量要求高。为加快施工进度,采用了增设施工支洞,分部开挖、分区支护,选用高效设备,优化爆破设计,加强监测和施工组织管理等措施,保证了工程按期完成,保障了施工安全,提高了开挖支护施工质量,提升了施工效率,对类似工程施工有一定的借鉴意义。

Construction of diversion tunnel is fairly difficult and also facing high quality requirements due to complex geological conditions and larger engineering quantity.In order to accelerate construction progress,measures such as arranging more construction adits,subdividing excavation,zoning support,selecting high-efficiency equipment,optimizing blasting design,strengthening monitoring and construction organization management are adopted to ensure on-time completion of the project and to ensure construction safety.With those measures,the quality of excavation&support as well as the construction efficiency are improved.Experience accumulated can be referenced in construction of similar projects.