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大口径排水管道(箱涵)是城市排水体系的重要基础设施,其安全性至关重要。对现行《城镇排水管道检测与评估技术规程》(CJJ 181—2012)中的管道检测方法进行拓展,通过引入结构检测分析方法,对某污水箱涵进行结构安全性检测,获取箱涵材料强度、顶板厚度、损伤现状等检测数据,并结合箱涵原始设计资料,采用有限元方法对比分析目前箱涵相对原设计箱涵在不同运营工况下的结构承载能力及上部容许附加荷载变化,为箱涵的后续加固修缮提供依据。
Large-diameter drainage pipe (box culvert) is an important infrastructure of urban drainage system, its safety is crucial. This paper extends the existing pipeline inspection methods in the Technical Code for Testing and Assessment of Urban Drainage Pipelines (CJJ 181-2012). By introducing structural detection and analysis methods, the structural safety of a sewage tank culvert is tested to obtain the strength of the culvert materials, Roof thickness, damage status and other testing data. Combined with the original design data of box culvert, the finite element method is used to compare and analyze the structural carrying capacity and the upper allowable additional load change of the box culvert relative to the original designed box culvert at different operating conditions. Culvert to provide the basis for subsequent reinforcement and repair.