自行式跨钢支撑三步台车在高铁明挖隧道中的应用研究  

RESEARCH ON THE APPLICATION OF SELF-PROPELLED STRADDLE STEEL SUPPORTED THREE-STEP TROLLEY IN HIGH-SPEED RAILWAY OPEN-CUT TUNNEL

作　　者：江天堑 Jiang Tian-jian

机构地区：[1]中铁隧道局集团有限公司,南京210019

出　　处：《建筑技术开发》2024年第7期79-82,共4页Building Technology Development

摘　　要：近些年,高铁明挖隧道设计在平原地区被广泛应用,深基坑结构施工过程受力体系转化可通过设置临时倒撑解决的,但其限制了常规模板台车的使用。通苏嘉甬高铁汾湖隧道出口明挖段设计有1~2道倒撑,实际施工中通过与台车生产厂家联合设计自行式跨钢支撑三步台车,解决了明挖深基坑隧道不能使用台车的局限性。研究结合工程实际情况,从成本、进度、质量、安全、环保等方面综合考虑后,通过应用自行式跨钢支撑三步台车,使施工工序简单、便捷,结构施工功效高,提高了混凝土外观质量,减少了搭设、拆除满堂脚手架时间,减少了周转材料用量,同时也节约了施工成本。经实践证明,该施工技术可行、可靠,并达到了预期的效果,以期为类似工程提供借鉴。In recent years,the design of high-speed rail open cut tunnels has been widely used in suburban areas of plain areas.The transformation of the stress system during the construction process of deep foundation pit structures is solved by setting temporary backrests,which limits the use of conventional formwork trolleys.The design of the open cut section at the exit of the Fenhu Tunnel of the Tongsu Jiayong high speed railway includes 1~2 backrests.The project has solved the limitation of not using backrests in open cut deep foundation pit tunnels by jointly designing a self-propelled cross steel support three-step trolley with the trolley manufacturer.the author of the article combines the actual situation of the project and comprehensively considers cost,progress,quality,safety,and environmental protection.by using a self-propelled cross steel support three-step trolley,the construction process is simple and convenient,the structural construction efficiency is high,the appearance quality of concrete is improved,the time for setting up and dismantling full scaffolding is reduced,the amount of turnover materials is reduced,and costs are also saved.Through construction practice,it has been proven that this construction technology is feasible and reliable,achieving the expected results.In order to provide reference for similar projects.

关 键 词：自行式跨钢支撑 模板台车 高铁明挖隧道 

分 类 号：U455.7[建筑科学—桥梁与隧道工程]