北京地铁6号线东四站洞桩法施工工艺

6620111No13u北京地铁6号线东四站洞桩法施工工艺12(1.714000;2.065201)[]洞桩法又称为PBA工法(pile-桩,beam-梁,arc-拱),是浅埋暗挖法的一种以/先护后挖,及时支撑0为原则,先开挖小导洞,再施做桩梁拱作为支护系统将各个导洞连接起来本文针对具体实例就洞桩法的施工工艺进行探讨,着重介绍了洞桩法的施工总方案,导洞和扣拱施工的关键工艺[]PBA导洞扣拱ThePBAConstructionTechnologyINDongsistationofBeijingmetroline6Abstract:TheholepilemethodisalsocalledPBAprocess,itisakindofshallowtunneling.Basedonprincipleoffirstlyprotec-tingthandigging,timelysupporting,smalldriftisfirstlyexcavated,thenpiles,beamsandarchareconstructedassupportingsystemtoconnecteachdrift.Basedonpracticalexamples,thispaperdiscussestheholepileconstructiontechnology,emphaticallyintroducesthetotalconstructionmethodofholepileandthekeytechniqueofdriftandbucklearch.Keywords:PBA;smalldrift;bucklearch:,,,:,,,:1,,,19218,2313,158m,14m,1315~14m,,PBA,:,-,-2:,,,15m,,,,,,3,:,,,(3-5),,,,u20111No1367,,:(A)(D),(,31,(A)(D),),:(B)(C),(),(2)(3),:ÑÒÓ,ÑÒÓ(Ò,ÑÓ,ÑÓ,),,,3/,,,,,0++1),,,,,,C25,,,2),,,,,\10d,\5d(d)522,,@1000mm,(5d,10d,d),(,,),5615,150@150,,,,,542@3125mm,115m,,3),,,,4)542@3125mm,L=018m,2m,,3(),011~013MPa4,,1):,,,,,2):,,,:CRD,,,,,,,PBA[1]王梦恕1地下工程浅埋暗挖技术通论[M].安徽教育出版社,20041[2]关宝树1隧道工程施工要点集[M].人民交通出版社,20031[3]董小龙1青年大街站PBA工法大跨扣拱关键技术[J].山西建筑,2009,(6).[4]黄瑞金1地铁浅埋暗挖洞桩法车站扣拱施工技术[J].地下空间与工程学报,2007,(2).[5]刘明忠,黄瑞金,范京玲,等1北京地铁10号线团结湖站洞桩法交叉部位扣拱施工技术[J].铁道标准设计,2008,(12).