全断面预制装配式隧道明洞设计施工关键技术  

Key Technology for Design and Construction of Full Section Prefabricated Assembly Open Cut Tunnel

作　　者：王志伟 马伟斌 王子洪 WANG Zhiwei;MA Weibin;WANG Zihong(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2022年第6期11-15,共5页Railway Engineering

基　　金：中国国家铁路集团有限公司科技研究开发计划(P2019G038);中国铁道科学研究院集团有限公司基金(2020YJ170)。

摘　　要：为全面验证推广全断面钢筋混凝土预制装配式隧道明洞结构,在国家铁道试验中心重载铁路试车线SIDK0+070—SIDK0+150区段设计了面向铁路的装配式明洞结构试验段。本文首先阐述了该试验段明洞结构分块方法和设计选型,通过建立车辆-轨道-装配式明洞耦合动力有限元模型对轨下结构的力学性能进行验算,得出最大加速度、最大竖向动位移、最大竖向动应力分别为9.1 m/s^(2)、6.4 mm、278 kPa,证明了列车荷载作用下结构的安全性满足设计要求。然后介绍了装配式明洞的施工过程及关键拼装工序,并提出了具备推广价值的新型条囊充液式结构外防水方案,可为相关工程建设提供参考。In order to comprehensively verify and popularize the full section reinforced concrete prefabricated open cut tunnel structure,a railway oriented prefabricated open cut tunnel structure test section was designed in SIDK0+070—SIDK0+150 section of the heavy haul railway test line of the National Railway Test Center.Firstly,this paper described the block method and design selection of the open cut tunnel structure in the test section.The mechanical properties of the structure under the track were checked by establishing the vehicle-track-prefabricated open cut tunnel coupling dynamic finite element model.The maximum acceleration,maximum vertical dynamic displacement and maximum vertical dynamic stress are 9.1 m/s^(2)、6.4 mm、278 kPa respectively,proving that the safety of the designed structure under the train load meets the design requirements.Then it introduced the construction process and key assembly process of the fabricated open cut tunnel,and put forward a new type of external waterproof scheme of the strip bag liquid filled structure with popularization value,which can provide a reference for the construction of related projects.

关 键 词：铁路隧道 全断面 预制装配式 隧道明洞 设计选型 结构验算 拼装施工 外防水 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]