软弱围岩大断面隧道斜井进正洞挑顶施工技术  

Upward Excavation into the Main Weak Rock Tunnel with Large Cross-section Through Inclined Shaft

作　　者：赵生彬[1] 辛军响[1] 

机构地区：[1]中铁十八局集团有限公司,天津300222

出　　处：《铁道标准设计》2011年第B12期132-134,共3页Railway Standard Design

摘　　要：隧道开挖期间,斜井进正洞衔接段是薄弱环节,尤其是大断面软弱围岩隧道的斜井至正洞段,处理不当会造成塌方,通过对乔家山隧道3号斜井进入正洞的施工方法进行总结,阐述特殊条件下斜井进正洞的施工工艺,为类似工程提供经验。During tunnel excavation,the section between inclined shaft and the main tunnel is the weak link,especially for large section weak rock tunnels.Improper processing can cause landslides.This article summarizes the construction method of upward excavation into Qiaojiashan main tunnel through inclined shaft No.3 under special conditions.

关 键 词：高速铁路 铁路隧道 斜井 正洞 挑顶施工 

分 类 号：U455[建筑科学—桥梁与隧道工程]