项目 2 排水管道开槽施工 Section 10Construciton of Drainage Pipeline Work30课件讲解.pptx

项目2排水管道开槽施工Section10 ConstrucitonofDrainagePipelineWorks

2.1.1城市排水工程基本认知2.1.1BasicUnderstandingofUrbanDrainageEngineering一、污水的分类I.ClassificationofSewage在使用过程中受到了不同程度的污染，改变了原来的化学成分和物理性质的水，叫污水。Waterthathasundergonevaryingdegreesofpollutionduringuse,alteringitsoriginalchemicalcompositionandphysicalproperties,iscalledsewage.生活污水DomesticSewage工业废水IndustrialWastewater按来源分ClassifiedbySource降水Precipitation城市污水UrbanSewage

2.1.1城市排水工程基本认知2.1.1BasicUnderstandingofUrbanDrainageEngineering一、污水的分类I.ClassificationofSewage生活污水——人们日常生活中用过的水，厕所、浴室、盥洗、厨房、食堂和洗衣房。DomesticSewage—Waterusedindailylife,fromtoilets,bathrooms,washrooms,kitchens,dininghalls,andlaundries.来源：住宅、公共场所、机关、学校、医院、商店以及工厂中的生活间部分。Sources:Residences,publicplaces,governmentoffices,schools,hospitals,shops,andtheresidentialpartsoffactories.特点：含有较多的有机物。Characteristics:Containsalargeamountoforganicmatter.

2.1.1城市排水工程基本认知2.1.1BasicUnderstandingofUrbanDrainageEngineering一、污水的分类I.ClassificationofSewage工业废水——工业生产中排出的废水。IndustrialWastewater—Wastewaterdischargedduringindustrialproduction.来源：各类工矿企业。Sources:Variousindustrialandminingenterprises.特点：成分复杂，受工业生产性质和工艺过程的影响明显，水量和水质变化大，对环境的危害大。Characteristics:Complexcomposition,significantlyinfluencedbythenatureofindustrialproductionandprocesses,withlargevariationsinwaterquantityandquality,andconsiderableenvironmentalimpact.

2.1.1城市排水工程基本认知2.1.1BasicUnderstandingofUrbanDrainageEngineering一、污水的分类I.ClassificationofSewage降水——指大气降水，包括雨、雪、雹、霜等。一般降水指的是雨水。Precipitation—Referstoatmosphericprecipitation,includingrain,snow,hail,andfrost.Precipitationgenerallyreferstorainwater.雨水特点：CharacteristicsofRainwater:一般比较清洁、径流量大。必须及时排泄，是排水的主要对象之一。Generallyclean,withalargerunoffvolume.Mustbedischargedpromptlyandisoneoftheprimarytargetsofdrainage.降雨初期径流的雨水由于会附带地面和屋面上的各种污染物质，使其受到污染，应予以重视。Theinitialrunoffofrainwatermaycarry