《河南水利与南水北调》2022年第12期勘测设计跨河桥梁防洪评价中壅水和冲刷计算问题探讨文星(巴音郭楞蒙古自治州水利水电勘测设计有限责任公司,新疆库尔勒841000)摘要:以某跨河桥梁为例,分别采用水面线法和流量分配公式对其防洪评价中桥梁壅水计算和冲刷计算进行了分析探讨,结果表明,通过水面线法推求不同断面壅水高度时,桥位断面和上游断面间距是影响计算结果的主要因素;而采用流量分配公式计算桥位冲刷深度时,计算结果主要受到河槽河滩流量分配的影响。文章分析基本上解答了困扰跨河桥梁防洪评价报告编写过程中,设计人员在计算方法选择及过程设计等方面的难题,为跨河桥梁壅水计算和冲刷计算结果的准确合理提供了保证。关键词:跨河桥梁;防洪评价;壅水计算;冲刷计算中图分类号:TV22文献标识码:A文章编号:1673-8853(2022)12-0050-02DiscussiononCalculationofBackwaterandScourinFloodControlEvaluationofRiverCrossingBridgesWENXing(BayingolinMongolAutonomousPrefectureWaterResourcesandHydropowerSurveyandDesignCO.LTD.,Korla841000,China)Abstract:Takingarivercrossingbridgeasanexample,thebackwatercalculationandscourcalculationofthebridgeinfloodcontrolevaluationareanalyzedanddiscussedrespectivelybyusingthewatersurfaceprofilemethodandtheflowdistributionformula.Theresultsshowthatwhenthebackwaterheightofdifferentsectionsiscalculatedbyusingthewatersurfaceprofilemethod,thedistancebetweenthebridgesitesectionandtheupstreamsectionisthemainfactoraffectingthecalculationresults.However,whenthescourdepthofbridgesiteiscalculatedbythedischargedistributionformula,thecalculationresultsaremainlyaffectedbythedischargedistributionofriverchannelandshoal.Theanalysisofthearticlebasicallysolvestheproblemsthatperplexthedesignersintheselectionofcalculationmethodsandprocessdesignduringthepreparationoffloodcontrolevaluationreportforrivercrossingbridges,andguaranteestheaccuracyandrationalityofbackwatercalculationandscouringcalculationresultsforrivercrossingbridges.Keywords:rivercrossingbridge;floodcontrolevaluation;backwatercalculation;scourcalculation■■■■■■■■■■■■■■作者简介:文星(1987—),男,工程师,主要从事水利水电工程设...