Study On Control Measures And The Effection On Sewer Pipe Sediment

The strom sewer sediments deposition at the swer pipeand contains largecoteminations，which can increase pipeline transmission capacitys and pose a threat tothe water environment. Based on the investigation of physical properties of Beijngsewer sediments, Control measures to reduce the whole process of the sewersediments was established. Measured by research papers in Beijing surface garner,sAdjust the Cleaning mode、Build green roof was proposed to control the stromwatersewer sediments at the beginning of the happen of the suspended solids.A new grassedswale was designed to contral the sewer sediments when suspended solids going tothe pipe.The investigation result indicated that the mass fraction of the surface garnerwhich Particle size large then125mm was between20.18%-41.54%,most of themcame from road washing and Construction site.Based on the investigation of the surface garner,Beijing surface ganer’loadingwas47.42g/m~2. Comparing the cumulative storm sewer sediments and surfacematerial of particle size distribution, storm sewer sediments could be reduced andcontrol by adjusting the Cleaning mode、Building green roof can reduce. Cleaning ratewas increaseed38%through adjusting the Cleaning mode.41.93%suspended solidswas sluggished by green roof.A new grassed swale was designed, through the suspended solids removal oftainwater、enhancing infiltration、water cut and the effect of water purification werestudied by experimental. Experiments indicated that94%suspended solids wasremovaled,70%surface flooding could be reduced, and other pollutants instormwater runoff had be a better control effect. Based on the experimental study andapplication examples at h domestic and foreign, the key design parameters wasproposed.Reduction of SS postpartum control measures were reviewed, effect of watersedimentation、schematic diagram for rain water pipe sediment were reviewed.