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1、重庆交通大学教案《公路工程机械化施工与管理》授课章节第四章 路面基层(底基层)施工主要内容§4-1稳定土拌和机作业特点§4-2稳定土厂拌设备作业特点§4-3稳定土摊铺机作业特点§4-4碎、砾石基层(底基层)施工§4-5稳定土基层施工§4-6石灰土废渣基层施工授课方式多媒体授课目的1.了解和掌握稳定土拌和机、厂拌设备以及稳定土摊铺机的基本结构和作业特点2.了解和掌握常见碎石基层(底基层),砾石基层(底基层)、稳定土基层以及石灰土废渣基层的施工工艺及质量要求教学内容要点第四章 路面基层(底基层)施工一、基础知识1.无机
2、结合料稳定材料在粉碎的或原状松散的土中掺入一定量的无机混合料(包括水泥、石灰或工业废渣等)和水,经拌和得到的混合料在压实与养生后,其抗压强度符合规定要求的材料。2.基层(底基层)在路面结构中,将直接位于路面面层之下的主要承重层称为基层,铺筑在基层下的次要承重层称为底基层,但一般常将二者统称为基层。基层承受由面层传递而来的行车荷载垂直应力作用,抵御环境因素的影响,是构成路面整体强度的主要组成部分。3.半刚性基层(底基层)由于无机结合料稳定材料的刚度介于柔性路面材料和刚性路面材料之间,常称此为半刚性材料,以此修筑的基层
3、或底基层亦称为半刚性基层(底基层)。integratedenergy,chemicalsandtextileYibincity,arethethreecorepillarsoftheindustry.In2014,thewuliangyebrandvalueto73.58billionyuan,thecity'sliquorindustrysliptostabilise.Promotingdeepdevelopmentofintegratedenergy,advancedequipmentmanufacturing
4、industry,changningdistrict,shalegasproductioncapacityreached277millioncubicmetres,builtthecountry'sfirstindependenthigh-yieldwellsandpipelinesinthefirstsection,theleadinfactoryproductionandsupplytothepopulation.2.1-3GDPgrowthfigure2.1-4Yibin,Yibincity,Yibincit
5、y,fiscalrevenuegrowth2.1.4topographyterrainoverallisSouthwest,North-EasternState.Lowmountainsandhillsinthecitylandscapeasthemainridge-and-Valley,pingbasmallfragmentednaturepicturefor"waterandthesecondlandofthesevenhills".236metersto2000metersabovesealevelinthe
6、city,lowmountain,46.6%hills45.3%,pingbaonly8.1%.2.1.5developmentofYibinlandscapesanddistinctivefeatureinthecenterofthecity,withlimitations,andspatialstructureoftypicalzonalgroup,2012-citiesinbuildingwithanareaofabout76.2km2.Fromcity-buildingsituation,"oldtown-
7、theSouthBank"Centerconstructionislaggingbehind,disintegrationoftheoldcityisslow,optimizationandupgrading,qualitypublicserviceresourcesarestillheavilyconcentratedintheoldtowntogether.SouthbankCentrehasnotbeenformed,functionsoftheserviceareaspaceismissing.Meanwh
8、ile,peripheralgroupcentresservicewasweakandinadequateaccountingforcitydevelopment,"suspicious"patterncouldnotbeformed.Asregardstransport,withtheoutwardexpansionofcities,citieshaveb