资源描述:
《桩板式挡土墙施工作业指导书(挖孔桩施工)》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、桩板式挡土墙施工作业指导书1、桩板式挡土墙施工工艺流程图:施工准备施工测量土体开挖墙后回填施工桩施工挡土板施工检查验收2、桩板式挡土墙桩的施工工艺流程:放线定桩位及高程→开挖桩孔土石方→支护壁模板放附加钢筋→浇筑护壁砼(高出地面300mm)→检查桩位(中心)轴线→架设垂直运输架→安装卷扬机→安装吊桶、照明、活动盖板、水泵、通风机等→逐层往下循环作业→开挖扩底部分→检查验收→绑扎钢筋→放砼串筒(导管)→浇筑桩(柱)身砼(随浇随振)。3、挖孔桩施工方法:3.1、施工准备:档土墙施工前,silkdeficiencybuckleduetosetssilk
2、Shipullteethintoknifevolumetoobig,andpullteethofteethedgednotsharp,andteethedgedhasdamaged,andcutXiaofironslagaccumulated,reasonsdueto,toguaranteethreadquality,setssilktimesusedautomaticallysetssilkmachine,setssilkprocessingtimesfor1~4timesranging,DN15~DN32sets2times,DN40~DN5
3、0sets3times,DN70abovesets4times,Screenwhenyouarefinishedusingthestandardgaugestested.Drainagepipeslopeisnotuniform,tape,wireandothertoolstocheckthatpipeslopesmeetacceptancerequirement.2valveinstallationinstallationwithoutstrengthandtightnesstestwiththebrands,models,withthespe
4、cificationsofannexsamplingvalve10%andnotlessthan1,strengthandtightnesstest,mainshutoffvalveonthepipeshouldbeindividuallyforstrengthandtightnesstest.FlangeinstallationShiflangeendssurfaceparalleldegreesenough,tightsolidmethodnotmeetrequirementstwomethodblueendsurfaceeachotherp
5、arallel,itsdeviationnotisgreaterthanmethodblueODof1.5‰;twisttightboltShitosymmetriccrossfor3healthapparatusinstallationandwareconnectionoftodrainroadinterfaceseepagecheckseepageparts,againreplacedandwareconnectionofwateraccessoriesordrainagetied;checkseepageparts,againreplace
6、ddamagedpipelineannex.Healthapparatusinstalledlooseorhorizontal,verticaldeviation.Wareinstalledposition,9首先测定桩位、平整场地;安装井架;修筑出碴道路`;应做好截、排水及防渗设施。3.2、挖孔桩孔口部分处理:根据桩孔孔口段土质情况将井口挖至1.0m深时,即采用与桩身同级的钢筋砼浇注成锁口。用来防止下节井壁开挖时井口沉陷。锁口顶面平整,并略高出原地面300mm。3.3、桩孔开挖:3.3.1、充分做好施工准备工作。开挖采取边挖边护的方法。每节挖深
7、1m后,浇筑砼护壁,护壁厚根据地质情况具体确定。遇到特殊地质时开挖深度视地质情况确定,如石质风化易破碎或有地下水出露地段,井壁容易发生坍方,每节开挖深度相应缩短,整体岩层直接开挖,不护壁。3.3.2、开挖中为减轻开挖时对井壁的震动,土质地段采用人工从上到下逐段用镐、锹进行,坚硬土层用锤、钎或风镐破碎,挖土次序先中间后周边,挖孔软岩地段采用人工配合风镐进行,桩基嵌岩深度范围不得采用爆破施工。开挖过程中遇到地质破碎的地带采用钢箍或木头加强支护,同时加紧护壁的施工,使护壁尽快达到固壁作用。施工中随时检查孔径、中线及标高,每次开挖后都作好井身地质的观察和
8、记录,描绘地质柱状图,地质与设计不符时报请监理工程师,并采取相应的处理措施。3.3..3、为保证桩的浇筑支模的需要,桩的开挖尺寸应按设计