三台阶七步开挖法在超大断面扁平隧道的应用  

Application of Three-step and Seven-step Excavation Method in Super-large Section Flat Tunnel

作　　者：陈国政 孟陈祥 万波 张城 CHEN Guo-zheng;MENG Chen-xiang;WAN Bo;ZHANG Cheng(Shanghai Tunnel Engineering Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]上海隧道工程有限公司,上海200032

出　　处：《价值工程》2023年第32期86-89,共4页Value Engineering

基　　金：上海隧道工程有限公司课题:软弱岩层超大断面扁平结构矿山法隧道施工技术研究(2022-SK-19)。

摘　　要：针对Ⅳ级围岩超大断面扁平结构矿山法隧道洞身开挖及支护施工,为保证施工安全前提下降低施工成本,提高工程的施工效益,优化施工工序同时降低现场人员施工作业难度,提高隧道工程施工主体结构的施工质量,本文深入分析了三台阶七步开挖法实际应用过程中如何有效保障作业人员施工安全、洞身开挖支护实体结构工程质量,以及三台阶七步开挖法在超大断面扁平结构Ⅳ级围岩地质结构中高效施工的优势。In order to reduce construction costs,improve construction efficiency,optimize construction procedures,and reduce the difficulty of on-site personnel construction while ensuring construction safety,and improve the construction quality of the main structure of tunnel engineering construction,an analysis is conducted on the excavation and support construction of Class IV surrounding rock super large cross-section flat structure mining tunnel body.This article provides an in-depth analysis of how the three step seven step excavation method effectively ensures the construction safety of workers,the quality of the excavation and support of the tunnel body solid structure engineering,and the advantages of the three step seven step excavation method in efficient construction of Class IV geological structures with super large cross-section flat structures.

关 键 词：矿山法隧道 三台阶七步开挖法 围岩稳定 超欠挖控制 监控量测 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]