pipeline bridge upper structure 管桥上部结构 ; 管桥上部构造
Therefore, the upper bridge with simply supported continuous beam structure more and more.
因此，桥梁上部采用先简支后连续梁结构越来越多。
RC-masonry combination arch bridge makes rc arch ribs as former spanning structure and falsework of upper masonry's construction. Finally, reinforced concrete and masonry together form arch ring.
它提出了以RC拱肋作为先期的跨越结构和后期高强石砌体砌筑的施工支架，最终由石砌体和RC拱肋共同形成主拱圈的构思。
Design standard, geological conditions, structure type, upper structure, under structure of crossing bridge and road design under it in Nanji street of Harbin are expounded in this paper.
本文阐述了哈尔滨市南极街立交桥工程设计标准。地质概况、桥梁结构型式、上部结构，下部结构及桥下道路设计。
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