一种基于探地雷达等无损检测技术的污水处理设施混凝土顶板技术状况分级方法

A Technical Condition Classification Method for Concrete Roof of Sewage Treatment Facility Based on Nondestructive Testing

针对污水处理设施混凝土构筑物经常出现较为严重的腐蚀破坏现象,通过对上海市某污水处理厂混凝土进行非接触检测以及无损检测,得到污水处理设施混凝土顶板剩余厚度和保护层剥落厚度,结合实地测量结果验证了所开发的污水处理厂基础设施整体腐蚀程度检测技术的可靠性,最终结合提出的技术状况分级方法和耐久性评定方法,建立了污水处理设施混凝土构筑物检测评估标准化流程。对上海市某污水厂粗格栅和生物反应池廊道顶板进行试评价,计算得出该污水厂地区混凝土顶板剩余服役寿命为16.4 a,按下一阶段的服役年限要求为30 a计算,通过技术分级方法及耐久性评定方法可以得出:下一目标使用年限内不满足耐久性要求,应及时采取修复或其他提高耐久性的措施。

Sewage treatment facilities concrete structures often appear more serious corrosion damage phenomenon, through non-contact testing and non-destructive testing of concrete in some wastewater treatment plants in Shanghai, the residual thickness of sewage and the thickness of the concrete top slab where the protective layer was peeling off were obtained, and the reliability of the overall corrosion detection technology of the infrastructure was verified through the field measurement results in conjunction with the development of wastewater treatment plants, and finally the classification method and durability evaluation method were proposed in conjunction with the technical conditions, and the concrete structure of wastewater treatment facilities was established standardized testing and evaluation process. After the test evaluation of the coarse grating and bioreactor gallery roof slab of a wastewater plant in Shanghai, the remaining service life of the concrete roof slab in the wastewater plant area was 16.4 years. Based on the next service life requirement of 30 years, conclusions could be drawn by the technical classification method and the durability evaluation method. If the durability requirement cannot be met within the next target service life, repair or other measures should be taken in time to improve the durability.