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A platform for research: civil engineering, architecture and urbanism
Construction method of steel-concrete superposed beam cable-stayed bridge
The invention discloses a construction method of a steel-concrete superposed beam cable-stayed bridge. Wet joint pouring lags behind two sections, and secondary tensioning of an inhaul cable lags behind three sections. Under the condition that the structure stress meets the requirement, the effect of remarkably shortening the construction period can be achieved. The site construction is more convenient, and the tensile stress of the bridge deck can be reduced, so that cracking of the bridge deck is avoided. According to the invention, the stress of the steel beam at the non-cast wet joint part can be reduced to ensure the safety of the structure. The internal force of the inhaul cable can be accurately controlled, the line shape of the bridge can be well controlled, and errors generated in the aspect of elevation in the construction process can be reduced. The hoisting sequence of the bridge deck is determined through the elevation difference of the upstream and the downstream of the main longitudinal beam, the problem that the upstream and the downstream are easy to be asymmetrical in construction can be solved to a certain extent, and therefore the influence on bridge stress caused by uneven thickness during bridge deck pavement is avoided.
本发明公开了一种钢‑混叠合梁斜拉桥施工方法，湿接缝浇筑滞后两个节段进行，拉索二次张拉滞后三个节段进行。本发明可以在保证结构受力满足要求的情况下，达到显著缩短工期的效果，且更方便现场的施工，还能减少桥面板的拉应力从而避免桥面板的开裂。本发明可以减少未浇筑湿接缝部分钢梁的应力大小，以确保结构的安全。可以准确地控制拉索内力，还可以很好地控制桥梁的线形，还可以减少施工过程中在标高方面产生的一些误差。桥面板吊装的顺序通过主纵梁上下游标高差异进行确定，可以从一定程度上解决施工中容易产生上下游不对称的情况，从而避免因桥面铺装时厚度不均匀而对桥梁受力产生影响。
Construction method of steel-concrete superposed beam cable-stayed bridge
The invention discloses a construction method of a steel-concrete superposed beam cable-stayed bridge. Wet joint pouring lags behind two sections, and secondary tensioning of an inhaul cable lags behind three sections. Under the condition that the structure stress meets the requirement, the effect of remarkably shortening the construction period can be achieved. The site construction is more convenient, and the tensile stress of the bridge deck can be reduced, so that cracking of the bridge deck is avoided. According to the invention, the stress of the steel beam at the non-cast wet joint part can be reduced to ensure the safety of the structure. The internal force of the inhaul cable can be accurately controlled, the line shape of the bridge can be well controlled, and errors generated in the aspect of elevation in the construction process can be reduced. The hoisting sequence of the bridge deck is determined through the elevation difference of the upstream and the downstream of the main longitudinal beam, the problem that the upstream and the downstream are easy to be asymmetrical in construction can be solved to a certain extent, and therefore the influence on bridge stress caused by uneven thickness during bridge deck pavement is avoided.
本发明公开了一种钢‑混叠合梁斜拉桥施工方法，湿接缝浇筑滞后两个节段进行，拉索二次张拉滞后三个节段进行。本发明可以在保证结构受力满足要求的情况下，达到显著缩短工期的效果，且更方便现场的施工，还能减少桥面板的拉应力从而避免桥面板的开裂。本发明可以减少未浇筑湿接缝部分钢梁的应力大小，以确保结构的安全。可以准确地控制拉索内力，还可以很好地控制桥梁的线形，还可以减少施工过程中在标高方面产生的一些误差。桥面板吊装的顺序通过主纵梁上下游标高差异进行确定，可以从一定程度上解决施工中容易产生上下游不对称的情况，从而避免因桥面铺装时厚度不均匀而对桥梁受力产生影响。
Construction method of steel-concrete superposed beam cable-stayed bridge
一种钢-混叠合梁斜拉桥施工方法
WANG DA (author) / LI ZHENG (author) / XIANG SHENGTAO (author) / SHI JIALIN (author) / TAN BENKUN (author) / WANG LEI (author) / LIU YUXIONG (author) / CAI YANG (author)
2021-09-17
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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