预应力混凝土连续刚构桥设计与施工技术

河南第一高桥逢石河特大桥是河南省高速公路上最大的连续刚构桥梁,主桥上部为预应力混凝土连续刚构,下部为矩形空心薄壁墩,最高墩为107m,直径2.2 m的群桩基础;高墩采用自提式翻板施工方法、箱梁采用悬壁浇筑两T同步施工挂篮方法;成立现场工程质量实施小组,对现场安全、原材料质量等环节实施全过程质量安全管理和技术保证;从而加快了施工进度,确保了工程质量和施工安全,为连续刚构桥结构设计和施工质量控制积累了重要的工程经验。

DESIGN AND CONSTRUCTION TECHNOLOGIES OF PRESTRESSED CONCRETE CONTINUOUS RIGID FRAME BRIDGE

Fengshi River Bridge,the first highest bridge in Henan,is the largest concrete continuous rigid frame bridge in Henan express way.The superstructure of main span is the pre-stressed concrete continuous rigid frame,and the substructure is rectangular hollow thin wall pier,and the height of the highest pier is 107 m and with 2.2 m wide pile group foundation.The self-lifting platform trap door method was adopted to construct high pier;and the two-T synchronous suspending crane construction method with cantilever concreting was adopted to construct box girder.A field construction quality group was established,which was in charge of the entire process quality safety control and the technical guarantee,such key links as safety,material quality and so on;thus speeding up the construction progress and guaranteeing the project quality and the construction security,and which accumulated important project experience for the structural design and the construction quality control of continuous rigid frame bridges.