特征因子法提高污水管道地下水入渗检测效率的研究

Research on water quality factor method to improve the efficiency of groundwater infiltration detection in sewage pipes

由于服务年限较久和日常养护不到位等原因.我国的污水管道存在一定程度的结构性缺陷.在地下水水位较高的地区就可能发生地下水入渗进入污水管道的情况。进行管网运行情况检测的传统方法是使用CCTV对全管段进行检测,但这种方法成本较高,需花费大量人力和时间,效率较低。在对九江市某片区进行管网诊断时采用了特征因子法,并对比了使用常规指标COD、NH_(3)-N、TN、TP和特征因子锰离子计算的地下水入渗量,发现基于特征因子的污水管道地下水入渗判断准确率较高,达到88.9%,能减少83%的CCTV检测工作量。

Due to the long service life,inadequate daily maintenance and other reasons,many sewage pipelines in China have structural defects.In areas with high groundwater level,groundwater may infiltrate into the sewage pipelines.At present,the traditional method for detecting the operation of the network is to use CCTV to detect the entire pipeline,but this method is costly,requiring a lot of manpower and time,and is less efficient.The water quality factor method was used when diagnosing the sewage pipes in a certain area of Jiujiang City and compared with the groundwater infiltration calculated using the conventional indicators COD,NH_(3)-N,TN,TP and characteristic factor,manganese ion.It was found that the accuracy of groundwater infiltration judgment of sewage pipes based on water quality factors was higher,reaching 88.9%,which could reduce the workload of CCTV detection by 83%.