石济客专临近既有高速铁路桥梁设计  

Bridge Design near Existing High-speed Railway in Shijiazhuang-Jinan Passenger Dedicated Line

作　　者：孙宗磊[1] 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津300142

出　　处：《铁道工程学报》2016年第2期37-42,共6页Journal of Railway Engineering Society

摘　　要：研究目的:高速铁路对沉降等变形要求非常高,临近既有高速铁路修建新建筑物,由于新建筑物的基础基坑开挖、抽水、降水、荷载增加等因素对周围土层产生附加应力,从而引起高速铁路发生沉降变形。本文以新建石家庄至济南客运专线为背景,该线与京沪高铁并行距离长达99.4 km,济西联络线下穿京沪高铁,五里堂联络线小角度跨越胶济客专。为确保既有高铁的运营安全,开展临近高铁线间距选择、下穿高铁桥梁分析及自动化监测等桥梁设计和研究。研究结论:(1)确定了与京沪高铁合理的并行线间距为25 m;(2)通过采取以桥梁结构形式下穿京沪高速铁路,减小了桥下堆载对临近高铁产生的附加变形影响;(3)通过采用框架墩和连续梁顶推的形式小角度跨越既有胶济客运专线,减少了施工过程和后期养护维修对既有高铁运营的干扰;(4)首次在既有运营高铁上实现了长距离实时自动化监测;(5)本研究结论可为临近既有高速铁路工程的桥梁设计提供借鉴和参考。Research purposes： High - speed railway has very high demand in settlements, since new buildings near the existing high - speed railway will produce additional stress on the surrounding soil, thus cause settlement of high speed railway due to some factors such as pit excavation, pumping, precipitation, load increase and so on. Taking the new Shijiazhuang- Jinan Passenger Dedicated Line as the background, this line parallels Beijing- Shanghai High -speed Railway in a long distance of 99.4 kilometers, the linking -up road in Jinan West Station under- passes Beijing- Shanghai High -speed Railway, while the tie line in Wulitang crossed Qingdao -Jinan Passenger Dedicated Line with a small angle. In order to ensure the operation safety of the existing high. speed railway, Shijiazhuang - Jinan Passenger Dedicated Line carried out bridge design from spacing selection near high - speed railway, under - passing high - speed railway bridges analysis, and automatic monitoring. Research conclusions： （ 1 ） The parallel line spacing with Beijing - Shanghai High - speed Railway was confirmed based on certain specific research. （2）By under- passing the Beijing- Shanghai High -speed Railway, the deformation influence of the bridge pile load attachments on the adjacent high - speed railway was reduced due to the rationale base form. （3）Shijiazhuang- Jinan Passenger Dedicated Line crossed Qingdao -Jinan Passenger Dedicated Line in a small angle through the adoption of frame piers and continuous beam pusher, reducing the interference with existing high -speed operation in the constructing and maintaining process. （4） This is the first realization of high - speed long - distance real- time automatic monitoring, which escorts the smooth implementation of the project. （5）This research conclusion can provide reference for the engineering near the high speed railway.

关 键 词：临近高速铁路 沉降变形影响 数值分析 施工安全 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]