排水管渠水力特性及設計方法的比較研究.pdf

1、東南大學碩士學位論文排水管渠水力特性及設計方法的比較研究姓名：汪研申請學位級別：碩士專業(yè)：市政工程指導教師：王世和20080601ABSTRACTABSTRACTTheroughnesscoefficientiSakeyparameterindrainpipedesignandcalculationTherelationshipofitsvalueandhydrauliccharacteristicsofdrainpipesiSadif

2、ficultyinhydraulicsThisthesistendstoanalyzethehydrauliccalculationformulaforunpressufizeduniformflowincircularpipesanddiscussthefunctionofroughnesscoefjficientinformulacalculationInaddition，weconductacomparisonofdifferen

3、thydrauliccalculationformulasapplicabletoUPVCdrainpipes，takingengineeringdesignintoconsiderationThestudyinthisthesisindicatesthevalueofroughnesscogmcientisanimportantfactorwhichinfluencesthecomputingresultinhydrauliccomp

4、utationformulasforvariousdrainpipeswhilethevalueisinfluencedbymanyfactorssuchasRenumberandhydraulicradiusunderthesameconditions，withManning’SformulaandPavlovsky’SformulabeingtheempiricalformulaforcalculatingCh6zycoeffici

5、entAproperroughnesscoefficientindifferentcalculationformulashastobedeterminedbycalibrationmethodsandtheselectedvalueisinfluencedbycalibrationmethodsaswellasthemethodsappliedtodeterminingotherhydraulicfactorsSimilartofric

6、tioncogffieient，roughnesscoefficientsharesregionalcharacteristicsThediscriminationbetweenaroughregionandasmoothregioniSmadeaccordingtenumberandrelativeroughnessThecalculatedvaluewithPavlovsky’SformulaiSlessthanthatwithMa

7、nning’SformulaincalculatingtherelativechangerateofroughnesscoefficientduetothechangeofhydraulicradiusastherelativepiperoughnessdecreasesAndtheresultwithPavlovsky’SformulatendstobmorestableTheanalysisofobserveddrainpipeda

8、taindicateswhenthewaterlevelapproachesthetopofapipe，thecalculatedvaluewithManning’Sformulais1020％lessthanthemeasuredvaluewithroughnesscoefficientbeing0009Pavlovshky’SformulaCanbeappliedtothehydrauliccalculationofUPVCpipe

9、sandwaterdrainageworksdesignIncalculatingtheradiusofUPVCpipes，thecalculatedvalueisalmostthesameasthemeasuredvalueandthecalculatedvaluewithManning’Sformulawitharationalroughnesscog蚯cientbeing001l5Inadditionwehavederivedth

10、ecalculationformulaforflowvelocitywithflowaSacharacteristicparameterinthethesisBasedontheanalysisofhydrauliccharacteristicsanddesigntechniqueofUPVCdrainpipes，wehavealsoconductedacomprehensivecomparisonbetweennewplasticin

11、spectionwellsandtraditionalbrickinspectionwellsintermsoftechnologyandeconomyandexpoundedonthefeasibilityofapplyingplasticinspectionwellstodrainpipeconstructioninresidentialargasKeywords：UPVCpipe；roughnesscoefficient；calc