维持通航建筑物口门水深的护底加糙措施研究

20052SHUILIXUEBAO21:0559-9350(2005)02-0141-06(430072)TV135A(1)(2)()[1][2]20104t[3]()11.12004-01-05(2003CB415200)(1978-)20052SHUILIXUEBAO221.2(1)[4](2)[5]1.3[6]RJDRAUy=(1)UyRJADm(1)Un1R2/3J1/2(1)y=61n=AD6/1(1)3/2=DRgAgDJU(2)A[6](2)[7]3/2=DRkgDJU(3)20052SHUILIXUEBAO23gkk7.3k=6.3k4.0k3.65(2)(3)Akgk(2)A6/1=oooDDkknn(4)nn0D0(m)Dkk0kkk(4)1.41h1h2hLwhgugupzpzh+−=+−+=∆2221222211ααγγ(5)QBhh1hhw1LhLhJw∆==(6)(6)23/1022nhQBLh=∆(7)20052SHUILIXUEBAO24n0nh0h0202hnnh∆=∆(8)(8)L202nnJJo=(9)(9)22.1kd-0.1960.282mm[8]k03.6543276mm[9]k06.37.3[7]k7.3d(4)22n/n0220052SHUILIXUEBAO252.220[10]-(3)5500m3/s32.2.1205500m3/s38.515m()30mm40mm[10]50mm100mm150mm200mm250mm1()41/km/(/m)SJC134.381000/1.0SJC227.31030/1.0SJC3-23.071900/1.0SJC415.661830/1.0()20052SHUILIXUEBAO2642.2.24150mm()2356(0000)(m/s)5342/km//mSJC515.663131/1.034.381000/0.5SJC615.661830/0.5-23.071900/1.0SJC715.661830/0.5-23.071900/1.0SJC827.31030/1.03(5500m3/s)SJC5SJC6SJC7SJC8/m38.51539.40539.35239.37439.32/m0.890.8370.8580.8055641.49m/sSJC52.920000SJC61.9900002.990000SJC7-1.9600001.580000SJC8-2.410000SJC720052SHUILIXUEBAO275(5550m3/s)6(5550m3/s)3(1)(2)(3)(4)20052SHUILIXUEBAO28[1].[J].1999(7)5-8.[2].[J].1998(21)26-29.[3].[J].1998(3)245255.[4].[M].2000.[5].[J].1995(1)14-15.[6].[M].1989.[7].[J].1986(2)38.[8].-[M].1997.[9].()[A].()[C].2002.258311.[10].[D].2002.WaterdepthmaintenanceofnavigationpassbymeansofincreasingroughnessofchannelbedHUANGYing,LIYi-tian(WuhanUniversity,Wuhan430072,China)Abstract:Theprincipleofincreasingroughnessofchannelbedisusedtomaintainthewaterdepthofchannelforensuringtheoperationofnavigationbuilding.Theeffectivenessofthismeasureiscloselyrelatedtothediameteroftheroughnessmaterialtobeused.Thestabilityofmaterial,increaseofwaterdepth,variationsofhydraulicgradientandvelocitydistributioninnavigationchannelafterincreasingofroughnessmustbecomprehensivelystudiedtopreventfromharmfulinfluencestonavigation.ThisengineeringmeasureisappliedtosolvetheproblemofinsufficientwaterdepthofnavigationchannelprobablyoccurredtotheshiplockoftheGezhoubaProjectwhentheThreeGorgesProjectisputintooperation.Keywords:navigationpass;waterdepthdeficiency;increasingroughness;increaseofwaterdepth