客运专线预应力连续箱梁多点顶推施工技术

结合客运专线石咀大桥工程,阐述了客运专线预制箱梁多点连续顶推施工技术.着重介绍了箱梁顶推的场地布置、墩台滑动系统的结构及施工、导梁结构及其与主梁端截面的处理和顶推施工中的导向及纠偏技术.在施工过程中通过严格控制滑道系统顶面高程和对梁体主要控制截面的应变、应力监测,并根据实际情况采取多种措施保证梁体的安全.可为同类型的箱...

Construction Techniques of Multi-Point Jacking for Pre-Stressed Continuous Box Girders of the Passengers-Oriented Railway

With the Shizui Bridge Project of the passengers-oriented railway as a practical example,the multi-point jacking construction technique for the continuous pre-stressed box girder of the passengers-oriented railway is dealt with in the paper,with greater stress placed on the introduction to the lay-out of the girder-jacking site,the structure and construction of the sliding system for piers and abutments,the structure of the guide beam,the treatment of the end cross-section of the guide beam and the main girder,and the guiding and the deviation-rectifying techniques during the jacking construction.In the course of the construction,through the strict control of the top elevation of the sliding system and the monitoring of the strain and stress of the main controlling cross-section of the girder body,the security of the girder body is ensured with a variety of other measures taken according to the specific site conditions.The project may serve as a useful reference for the jacking construction of box girders of the same type.