周边多风险源环境下箱涵顶进下穿铁路变形控制技术研究  

Deformation control technology research for box culvert jacking and underpass railway in surrounding environments with multiple risk sources

作　　者：周萌 ZHOU Meng(China Railway Shanghai Design Institute Group Corporation Limited,Shanghai 200070,China)

机构地区：[1]中铁上海设计院集团有限公司,上海200070

出　　处：《现代城市轨道交通》2024年第4期84-91,共8页Modern Urban Transit

摘　　要：临近铁路路基及桥梁桩基的基坑工程设计难度大、施工风险高,可参考的工程案例及施工经验较少,合理设计基坑支护方案及施工工艺对控制周边建构物的变形至关重要。文章依托上海涞坊路下穿沪昆铁路及沪杭高铁工程,针对顶进工作坑临近高架桥桩基及沪昆铁路路基、在高铁路基侧零距离开挖并现浇箱涵连接段等一系列工程难题,提出分节、分段、多工法组合的隧道连接方式,形成复杂环境下的多工法组合城市道路隧道设计方法及施工技术。现场实测数据表明,采用多工法组合的下穿施工技术对临近高架桥桩基、沪昆铁路路基、沪杭高铁路基影响均满足规范控制要求,相关研究成果可为类似复杂多风险源环境下的下穿铁路施工提供参考。Foundation pit projects near railway roadbeds and bridge pile foundations have high design difficulties and construction risks,and there are few reference engineering cases and construction experiences to refer to.Logical designs of foundation pit supporting schemes and construction technologies are crucial for controlling the deformation of surrounding structures.Based on the project of Laifang road undercrossing Shanghai-Kunming railway and the Shanghai-Hangzhou high-speed railway,targeting a series of engineering difficulties,such as jacking working pits being close to viaduct pile foundations and the Shanghai-Kunming railway roadbed,as well as the zero-distance excavation and cast-in-place box culvert connection sections on the side of high-speed railway roadbeds,this article proposes a tunnel connection method that combines segmented,sectioned,and multi-working methods.This forms an urban road tunnel design method and construction technology with multi-construction method combinations in complex environments.Field measurement data demonstrate that the underpass construction technology using a combination of multiple methods meets the standard control requirements for nearby viaduct pile foundations,the roadbed of Shanghai-Kunming railway embankments,and the roadbed of Shanghai-Hangzhou high-speed railway.The research findings can serve as a reference for underpass railway construction in similar complex and multiple risk sources environments.

关 键 词：下穿铁路 箱涵顶进 临近高铁施工 多风险源 变形控制 

分 类 号：U449.5[建筑科学—桥梁与隧道工程]