在役钢筋混凝土渡槽安全评价与病害处理

针对大型灌区中输水渡槽普遍出现的病害现象,结合某大型钢筋混凝土渡槽工程,进行现场质量检测分析,运用有限元软件模拟了渡槽在各工况下静、动力状态,对钢筋混凝土渡槽局部与整体的安全稳定性进行多角度科学的评价与病害分析,并提出了针对性的加固方案,在工程中成功应用与推广。现场质量检测分析和三维数值模拟相结合的方法能够更加科学地评价渡槽结构整体的安全稳定性,同时也为老旧渡槽的安全评价与病害处理提供一种新思路。

Safety evaluation and disease treatment of reinforced concrete aqueduct in service

Aiming at the diseases commonly occurred on the water conveyance aqueduct in large-scale irrigation area and combining with a large-scale reinforced concrete aqueduct，the in situ quality inspection and analysis are made on the aqueduct，and then the static and dynamic statuses of it under various operation conditions are simulated with finite element software; from which multi-aspect scientific evaluation and relevant disease analysis are made on the local and overall safety and stability of the reinforced concrete aqueduct，while a targetable strengthening scheme is put forward，which is successfully applied and popularized in the project. The method combining in situ quality inspectionand analysis with 3 － D numerical simulation can evaluate the overall safety and stability of the aqueduct structure more scientifically，meanwhile，provides a new idea for the safety evaluation and disease treatment of old aqueduct.