钢-混凝土组合梁桥维修加固质量检验评定方法研究

我国早期修建的钢-混组合梁桥经过二十余年的运营使用,已步入生命周期的第一个阶段。由于结构材料及构件本身性能退化,外部环境的侵蚀作用,以及超载运营等其他非常规因素的影响,开始出现桥面板破损,钢梁锈蚀等病害。该文介绍了对该阶段这类桥梁进行维修加固措施及加固质量检验评定方法的研究。首先从这类桥梁目前常见病害及维修加固措施研究入手,归纳出钢梁结构的防腐及重新涂装,混凝土桥面板的更换,钢梁构件连接的更换及处理,杆件、构件的尺寸检查及矫正,以及钢梁裂纹的修复等五项基本能代表当前阶段钢-混组合梁桥维修加固措施的内容。然后针对各项处理措施建立相应的质量控制及检验评定的指标体系,并给出检验指标相应的评价标准和检验方法。

Study on Maintenance Reinforcement Quality Inspection and Evaluation of Steel-Concrete Composite Bridges

After service and operation for morn than twenty years,the steel-concrete composite bridges built in early stage have step into the first stage of life cycle in China.Due to deterioration of structural materials and component performances,corrosion of external environment,overload operation and the other unconventional factors,the bridge diseases such as bridge deck damage,steel girder corrosion and etc.begin to appear.This paper introduces the study on maintenance and reinforcement measures,and reinforcement quality inspection and evaluation for this kind of bridges in this stage.The paper firstly studies the common diseases and the corresponding maintenance reinforcement measures for this kind of bridges,sums up five measures basically covered maintenance and reinforcement methods for this kind of bridges in current stage,that is,anticorrosion and recoating of steel girder,replacement of concrete bridge deck,replacement and treatment of component joints for steel girder,dimensional checks and correction of component and bar,and crack repairing of steel girder,then establishes the corresponding index systems of quality control,inspection and evaluation for various treatment measures,and gives the evaluation standards and inspection methods for the inspection indexes.