钢筋混凝土双曲拱桥检测及承载能力评估

Detection and evaluation of carryingcapacity of reinforced concrete double arch bridge

钢筋混凝土双曲拱桥是中小跨径常用的拱桥形式。然而,由于其结构、设计和施工上的缺陷,双曲拱桥运营到现在出现了很多问题。以一座实桥为例,进行了病害调查、混凝土强度评定及结构检算,对现有桥梁状况进行了评估,判断了桥梁的承载能力,提出了加固建议,可供该类现有桥梁的维护使用和加固改造工作借鉴。

The double arch bridge is a usual bridge type for medium-and-small-span. However, because of the defect of structure, design and construction at that time, the operating double arch bridge appears many questions now. In this paper, by way of example a bridge, through field investigation of the defects and concrete strength, structure calculations, it is hoped to evaluate the work state and judge carrying capacity of the bridge. Through analyzing the calculation results, the measure to strengthen the arch bridge is suggested. By the way, the results here delivered maybe helpful for the same kind of reinforced concrete arch bridge's refreshing and maintenance.