汉江地区内河桥梁桩基冲刷损伤评价指标体系研究

Study on Evaluation Index System of Erosion Damage to Bridge Pile Foundation at Inland River in Han River Region

调查分析陕西地区内河桥梁桩基冲刷受损的情况,利用层次分析-模糊综合评价法,建立桥梁桩基冲刷损伤评价指标体系与综合评价模型,并根据评价模型所划分的不同安全度等级,制定不同的安全防护措施。运用所建模型对安康市汉滨区汉江一桥桩基础冲刷损伤状况进行评价分析,汉江一桥目前的冲刷安全度等级为Ⅱ级,桥梁桩基存在一些磨损,但结构完整度高,且使用功能正常,分析结果与现场实际情况较为吻合。

According to the investigation and analysis of erosion damage to bridge pile foundation at inland river in Shaanxi region,analytic hierarchy process-fuzzy comprehensive evaluation method was used to establish the evaluation index system and comprehensive evaluation model of erosion damage to bridge pile foundation,and then according to the safety integrity level classified by the evaluation model,the different security measures were formulated.By use of the model established,the situation of erosion damage to pile foundation of Hanjiang First Bridge in Hanbin District,Anking City was evaluated as follow:the erosion safety integrity level of the Bridge is Level II currently,there had some abrasion at the bridge pile foundation,but the structure has high degree of integrity with normal performance.The analysis result is in good agreement with the actual situation at the site.