跨越铁路预应力混凝土连续梁顶推施工技术-《高速铁路技术》

文章信息/Info

Title:: Construction Technology on Prestressed Concrete Continuous Girder Launching over Existing Railway

Author(s):: ZHAO Xifa; Qingdao-Rongcheng High-speed Inter-city Railway Co., Ltd., Yantai 264000, China

Keywords:: crossing over existing railway|continuous girder|launching design|construction control

摘要:: 青荣城际铁路跨蓝烟铁路特大桥紧邻铺轨基地，是全线控制性工程之一，其特殊结构101.2m曲线预应力混凝土连续梁是全线重点工程，采用旁位整体预制多点步履式顶推方法施工，并展开相关施工技术研究。通过研究，连续梁施工采用了四项新技术：（1）采用贝雷片导梁节省了临时设施费用；（2）采用滑道纠偏技术解决了连续梁曲线前行问题；（3）采用总控和分控电气控制系统解决了梁体顶推同步问题；（4）采用梁体应力控制技术解决了梁体混凝土开裂问题。新技术的应用和过程控制保证了蓝烟线运输安全，缩短了工期，节省了投资。

Abstract:: The super major bridge crossing over Lancun-Yantai railway in Qingdao-Rongcheng high-speed inter-city railway, one of the control engineering projects, is near track laying base. 101.2 m curve prestressed concrete continuous girder as its special structure is an emphasis project all of the line, adopted side whole prefabrication and multi-point walking-type incremental launching method, and carried out interrelated construction technologies research. Four new technologies are adopted for the concrete continuous girder construction:The first one is that bailey slices nose is adopted to save temporary facilities expenses. The second is that slide deviation rectifiable technology is adopted to solve curve forward problem. The third is that comprehensive in combination with separating electrical control system is adopted to solve the synchronous launching problem. The fourth is that the stress control method is adopted to solve the concrete continuous girder split problem. New technologies’ application and process control ensure the transport safety of Lancun-Yantai railway, and decrease the construction time and save the cost.