检查井是生产污水、生产废水和生活污水管线中多管汇合、管道转弯及汇聚疏通管道中淤积物的附属构筑物。按照国家及各省标准图施工的检查井,底部都具有流线槽。这种底部结构在工程使用中有不太理想的地方。其原因是:下水管线很长(如长达百、千米以上)时,管道中污水夹杂的固体物随着污水流经管道越长,就积聚 Inspection wells are ancillary structures in the production of sewage, production wastewater, and domestic sewage pipelines that converge in multiple pipes, turn pipes, and collect sediment in pipelines. The inspection wells constructed in accordance with national and provincial standards maps have streamline slots at the bottom. This bottom structure is not ideal for use in engineering. The reason for this is that when the sewage pipeline is very long (for example, up to 100 km or more), the solids in the wastewater in the pipeline will accumulate as the sewage flows through the pipeline.