景区人行索桥的检测和评估

Inspection and Assessment of Pedestrian Suspension Bridge in Scenery Spots

为保证景区桥梁运营的安全性,对浙江省1座人行索桥进行病害检测及评估工作。通过桥梁病害检测、线形测量、静动载试验和有限元建模计算分析相结合的方法检测及评估该桥的运营状况。检测结果表明:该桥主要受力构件基本完好,部分构件与附属结构存在缺陷及轻微损伤,可修补完善;桥面线形平顺,试验过程中未出现扭转变形等异常现象;锚体稳定,地锚混凝土及周围岩体在加载过程中未出现裂缝。该桥虽存在轻微病害,但整体状况良好,能满足使用要求。建议在主桥两侧各加1道防风缆,以减小桥面的侧向倾斜,并增加行人的安全感。

In order to ensure the operation safety of the bridges in scenery spots, a pedestrian bridge in Zhejiang Province was cited as an example. The deterioration inspection and assessment was carried out for the bridge. The service condition of the bridge was inspected and assessed by means of the combination of bridge deterioration inspection, geometry measurement, static and dynamic tests and finite element model computing analysis. The results of the inspection indicate that the main load bearing components of the bridge basically remain intact, some components and subsidiary structures have defects or minor damage, which can be repaired and improved. The geometry of the bridge deck maintains smooth, no torsional deformation occurs in the test process. The anchorage structure is stable, no cracks are found in the concrete of the ground an- chor blocks and in the surrounding rocks during the load application process. Although the bridge has minor deterioration, its overall condition is good and can meet the service requirements. It is suggested that one wind resistant cable be added to each of the two sides of the main bridge, so as to reduce the lateral offsetting of the bridge deck and enhance the sense of safety of the pedestrians.