地铁盾构始发接收区间洞门拆除技术分析
Technical Analysis of the Removal Techniques for Shield Tunnel Launch and Reception Portals in Subway Construction
杨晓勇 1朱进 1李迎春 2潘惠忠 3何凡 4季俊宇 5杨兰检3
作者信息
- 1. 苏州轨道交通建设有限公司,江苏苏州 215131
- 2. 无锡地铁集团有限公司,江苏无锡 214000
- 3. 南京君缘科爆工程技术有限公司,江苏南京 210000
- 4. 上海隧道工程有限公司,上海 200020
- 5. 江苏苏州地质工程勘察院,江苏苏州 215000
- 折叠
摘要
为确保工程安全,地铁盾构区间钢筋混凝土洞门在盾构始发或接收前需提前拆除或在钢筋骨架材料上进行替换,主要包括人工风镐凿除法、盾构机切割免凿除法、机械化凿除法等,目前应用较多的是人工风镐凿除法,但人工凿除时间长、环境差;免凿除法需把盾构区间洞门内的部分受力钢筋替换成玻璃纤维筋,依靠盾构机刀盘直接切削,但在软土地层中需提前对盾构刀盘进行专项设计;机械拆除法是介于两者之间的凿除方法,具有高效、环保、安全可靠的特点.通过对比分析,得出3种方法的适用性和性价比,为今后地铁施工提供参考.
Abstract
To ensure construction safety,the reinforced concrete portals of subway shield tunnel sections need to be demolished or replaced on the steel reinforcement framework before the shield machine's launch or reception.The primary methods include manual pneumatic pick removal,shield machine cutting without prior removal,and mechanical removal.Currently,the most commonly used method is manual pneumatic pick removal;however,it is time-consuming and performed in poor environmental conditions.The cutting without prior removal method involves replacing some of the load-bearing steel bars in the tunnel portal with glass fiber reinforcement,allowing the shield machine's cutterhead to cut directly through them.However,this method requires a specialized design of the shield cutterhead in soft soil conditions.The mechanical removal method is a middle-ground approach,offering high efficiency,environmental friendliness,and safety.Through comparative analysis,the applicability and cost-effectiveness of the three methods are assessed,providing a reference for future subway construction.
关键词
盾构区间洞门/人工凿除/免凿除/机械凿除Key words
shield tunnel portal/manual removal/cutting without prior removal/mechanical removal引用本文复制引用
出版年
2024
NETL
NSTL
万方数据