高速铁路大跨度空腹式连续刚构设计
发布时间：2018-08-09 08:20
【摘要】：银西高铁漠谷河2号特大桥桥高114 m,为适应桥高并结合地形起伏要求,主桥采用(120+210+120)m预应力混凝土空腹式连续刚构桥,主梁为拱形V撑与箱梁截面的新型组合结构形式,该结构为铁路预应力混凝土桥梁跨度之最。采用Midas软件对主桥进行结构计算,模拟悬臂浇筑法施工,辅助以临时扣锁和支架,使V撑上下弦可以同时施工。计算结果表明,该结构增加了结构的跨越能力,减少了跨中收缩徐变上拱值,在施工及运营阶段的刚度、强度均满足规范要求,具有良好的动力特性。该结构采用柱板式空心墩与主梁固结,线性优美,工程经济,结果可为铁路大跨高墩桥梁设计和施工提供参考。
[Abstract]:The 2 Mega Bridge Bridge of Yinxi high iron desert valley river is 114 m high. In order to meet the requirement of bridge height and combination of topographic relief, the main bridge is (120+210+120) m prestressed concrete hollow continuous rigid frame bridge. The main beam is a new composite structure of arch shaped V brace and box girder section. This structure is the most span of the railway pre stress concrete bridge. The Midas software is used for the main bridge. The bridge carries out the structure calculation, the cantilever construction method is simulated, and the temporary lock and support are assisted to make the V support the lower chords at the same time. The calculation results show that the structure increases the span capacity of the structure, reduces the arch value of the span in the mid span shrinkage and creep, and the stiffness of the construction and operation stage meets the requirements of the standard, and has a good power special. The structure adopts column-slab hollow pier and main beam to consolidate, which is beautiful in linearity and economical in engineering. The results can provide reference for the design and construction of long-span and high-pier railway bridges.
【作者单位】： 中铁第一勘察设计院集团有限公司桥隧处;
【分类号】：U448.23
[Abstract]:The 2 Mega Bridge Bridge of Yinxi high iron desert valley river is 114 m high. In order to meet the requirement of bridge height and combination of topographic relief, the main bridge is (120+210+120) m prestressed concrete hollow continuous rigid frame bridge. The main beam is a new composite structure of arch shaped V brace and box girder section. This structure is the most span of the railway pre stress concrete bridge. The Midas software is used for the main bridge. The bridge carries out the structure calculation, the cantilever construction method is simulated, and the temporary lock and support are assisted to make the V support the lower chords at the same time. The calculation results show that the structure increases the span capacity of the structure, reduces the arch value of the span in the mid span shrinkage and creep, and the stiffness of the construction and operation stage meets the requirements of the standard, and has a good power special. The structure adopts column-slab hollow pier and main beam to consolidate, which is beautiful in linearity and economical in engineering. The results can provide reference for the design and construction of long-span and high-pier railway bridges.
【作者单位】： 中铁第一勘察设计院集团有限公司桥隧处;
【分类号】：U448.23
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