ZSKai设计说计说明2010-6-2.doc
潍坊学院本科毕业论文第页I摘要本次设计为途径陕西渭南的一段一级公路设计。全线在渭南白杨乡境内,总长7800米。此次设计的道路根据当地的交通量的大小要求为双向四车道,设计时速为80千米/小时,道路总宽度为24.5米,单向行车道宽7.5米。由于所筑道路所经路程既有平原微丘又有起伏较大山岭重丘,施工较为困难,土石方工程浩大,施工过程中要解决很多技术问题,故施工工期受到多方面影响。道路全线总长7800米,其中道路建设长度为7800米,由于从K0+676-K0+682、K2+630-K2+698为两座中桥,根据平面图的地形、地貌、水文等条件可以知道在本路段要进行浸水路堤设计,为了防治河水冲刷对路堤造成破坏,故此路段的路堤采用了直接防护措施中的抛石防护的方法。在选线上,从道路所处地理条件,施工难度和经济上考虑,并且还要满足一级公路的行驶要求,确定主线。一级公路,对于平原微丘地形一般最小半径为1000m,极限最小半径650m:而对于山岭重丘地区地形一般最小半径为700m,极限最小半径600m。全线共设六处平曲线,纵断面上共设三处竖曲线,满足行驶最大坡度和长度要求,保证道路的通顺和良好的视野。新建路面设计总共分四层,规范规定高速公路、一级公路的面层由两至三层组成。根据规范推荐,本路面设计采用两层式沥青面层,表面层采用细粒式沥青混凝土(厚度4cm),中面层采用中粒式沥青混凝土(厚度6cm),基层采用石灰粉煤灰沙砾土(厚度26cm),下基层采用石灰土稳定碎石(厚度25cm)。当以设计弯沉值为指标及沥青层层底拉应力验算时,设计年限内一个车道上累计当量轴次1120万次,经验算弯沉值和拉应力均满足要求。施工组织设计主要确定了各项的施工工序和工艺流程。根据总体施工情况,总共设置了四个施工队平行施工。工期确定根据关键机器台班数量和工程量,施工工序相互协调确定,本次预计施工总工期大约七个月,由于天气或外界环境影响施工工期可以弹性变化。关键词平、纵、横路线设计,路面结构,施工组织。潍坊学院本科毕业论文第页IIABSTRACTThisisthedesignforthefirstclassroadinWeinan,ShanxiProvince.ThewholelineoftheroadlocatesinthebaiyangCounty,Weinanandthetotallengthis7800m.Theroadhasthecharactersasbelow:4-linedoubleway,80km/h,24.5mwideand7.5mwideperline.Fortheconcernofmountainousterrainanddifficultiesintheconstruction,theremightbemanyproblemsinthepracticalconstruction.Thetotallengthofthedesignis7800m.Theroadinconstructionisabout7800m.SinceK0+676-K0+682,K2+630-K2+698bridgefortwo,Undertheplantopographyoftheterrain,topography,hydrologicalconditionscanknowthatthesegmentforsoakingembankmentdesignTocombattheerosionoftheriverembankmentcauseddamage,Thereforesectionoftheembankmentusingadirectmeasureofprotectionriprapprotectionmethods.Whenchoosingthemainline,weconsiderthefactorsofmountainousconditions,constructiondifficultiesandfinancialbudget.Thereare5horizontalcurveswiththeradiuof1000m,and3verticalcurveswhichwouldensurethemaximumgradeandlengthrequirementsofdesign.Atthesametime,thetravelwouldbesmoothandthescopewillbefine.Theroadstructureconsistof6levels,Newpavementdesignledtoatotalbreakdown,normshighway,aroadsurfacebytwotothreecomponents.Accordingtonormsrecommendedthatthethree-tierdesignoftheroadasphaltsurface,usingfine-grainedsurfacelayerofasphaltmasticlithotripsy(4cmthickness),Faciallayerusedthetablets-gradedasphaltconcrete(5cmthickness),Belowlayerusingcoarseasphaltconcrete(thicknessof5cm)primaryuseofcementgravelsoils(thicknessunknown)andlimesoilstabilityscheduledlithotripsy(20cmthickness),thegrassrootsusinginterstitiallithotripsy(20cmthickness).Whenadesigndeflectionvalueofindicatorsandbottomlayersofasphaltstresscalculation,Designlifeofalanecumulativeequivalentaxleof11.2milliontimes,experiencecountdeflectionvalueandtensilestresscanmeetthedemands.Thispartofdesignisaboutmakingtherightsequenceofconstruction.Accordingtothegeneralsituation,weorganizefourdifferentgroupsworkinginparallel.Themethodforconstructionisdecidedbytheprojectquntumnandtechnologiesintheconstruction。Thetimeforconstructionisdeterminedbydainclassandtheprojectquntumn.Theoveralltimeofconstructionisestimatedtobesevenmonthswhichmightvaryduetotheweatherchanges.KEYWORDSpeace,verticalandhorizontallinedesign,surfacestructure,constructionmanagement,budget潍坊学院本科毕业论文第页III目录前言.1第1章总说明.41.1地形、地貌.41.2地质条件.41.3水文地质.41.4气候条件.51.5;旅游资源.51.1.6地震.5第2章路线设计.62.1设计概况.62.2平面线形设计.62.2.1路线定线、选线规则.62.2.2平曲线要素计算.82.3纵断面线形设计.122.3.1设计原则及要求.122.3.2竖曲线要素计算.152.4横断面线形设计.162.4.1本设计路段横断面设计形式.16第3章路基设计.173.1设计原则和依据.173.1.1设计原则.173.1.2设计依据.173.2横断面的设计情况.17潍坊学院本科毕业论文第页IV3.2.1路基横断面设计.173.2.2加宽设计说明.183.3路基排水系统结构和布置.203.3.1路基路面排水设计原则.203.3.2路基排水设计.203.3.3路面排水设计.22第4章路面设计.254.1路面设计原则.254.2设计步骤.264.2.1设计路面简介.264.2.2设计弯沉值和容许拉应力计算.264.2.3新建路面未知层(石灰土稳定碎石层)厚度计算.284.2.4设计指标汇总.29第5章公路施工组织设计.335.1编制依据.335.2编制原则.335.3工程概况.345.3.1主要技术标准.345.3.2工地交通条件.34工程所在区域的交通条件较好,但进场施工便道须拓宽,施工现场无现成可利用施工便道,需新建施工便道.345.4公路工程施工准备.345.4.1施工现场准备.345.4.2劳力、机具设备和材料准备.355.4.3技术准备.375.5地面道路施工.385.5.1原地面清理和填前碾压.38