dAAA桥涵施工技术【精品-ppt】.ppt

《dAAA桥涵施工技术【精品-ppt】.ppt》由会员分享，可在线阅读，更多相关《dAAA桥涵施工技术【精品-ppt】.ppt（27页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、第第7讲讲 涵洞施工技术涵洞施工技术7.1 7.1 管涵施工技术管涵施工技术 7.2 7.2 拱涵、箱涵、盖板涵施工技术拱涵、箱涵、盖板涵施工技术 7.1 管涵施工技术管涵施工技术公路工程中的管涵有混凝土管涵和钢筋混凝土管涵，目前我国公路工程中多采用钢筋混凝土管涵。公路管涵的施工多系预制成管节，每节长度多为1m，然后运往现场安装。管涵单孔有圬工基础双孔有圬工基础单孔无圬工基础双孔无圬工基础详细讲解单孔有圬工和无圬工基础管涵 涵洞施工技术 3.2 管涵施工技术 单单孔有圬工基孔有圬工基础础管涵管涵 挖基坑并准备修筑管涵基础的材料；砌筑圬工基础或浇筑混凝土基础；安装涵洞管节，修筑涵管出人口端墙、翼

2、墙及涵底(端墙外涵底铺装)；铺设管涵防水层及修整；铺设管涵顶部防水粘土(设计需要时)，填筑涵洞缺口填土及修建加固工程。施工程序 涵洞施工技术 3.2 管涵施工技术混凝土基础混凝土基础 涵洞施工技术 3.2 管涵施工技术夯实机夯实机 涵洞施工技术 3.2 管涵施工技术单孔有圬工基础管涵施工工序单孔有圬工基础管涵施工工序(2)单单孔无圬工基孔无圬工基础础管涵管涵 施工程序 挖基与备料与单孔有圬工基础管涵相同。在捣固夯实的天然土表层或矿砂垫层上，修筑截面为 圆弧状的管座，其深度等于管壁的厚度。在圆弧管座上铺设垫层的防水层，然后安装管节，管节间接缝宜留lcm宽。在管节的下侧再用天然土或砂砾垫层材料作培

3、填料，并捣实至设计高程(如图所示)，再将防水层向上包裹 管节，防水层外再铺设粘质土，并保证其与管节密贴。在严寒地区这部分特别填土必须填筑不冻胀土料在严寒地区这部分特别填土必须填筑不冻胀土料。修筑管涵出人口端墙、翼墙及两端涵底和进行整修工作。单孔无圬工基础管涵洞身安装程序单孔无圬工基础管涵洞身安装程序注：砂垫层底宽，非严重冰冻地区为注：砂垫层底宽，非严重冰冻地区为b，严重冰冻地区为，严重冰冻地区为a，即上下同宽，即上下同宽碎石基础 涵底陡坡台阶式基础管涵涵底陡坡台阶式基础管涵 施工特点陡坡台阶管涵陡坡台阶管涵 沟底纵坡很陡时，为防止涵洞基础和管节向下滑移，每段长度一般为35m，台阶高差一般不超过

4、相邻涵节最小壁厚的3/4。如破度较大可按23m分段或加大台阶高度，但不应大于0.7m，且台阶处的净空高度不小于1.0m此时在低处的涵顶上应设挡墙，以掩盖可能产生的缝隙。无圬工基础的陡坡管涵，只可采用无圬工基础的陡坡管涵，只可采用管节斜置的办法，斜置的坡度不得管节斜置的办法，斜置的坡度不得大于大于5。管涵基础修筑管涵基础修筑地基土为岩石地基土为砾石土地基土为粘性土地基土为软性土无圬工基础、挖去风无圬工基础、挖去风化层或软层化层或软层无圬工基础、用砂填无圬工基础、用砂填充地基土空隙并压实充地基土空隙并压实采用采用0.5m厚的圬工厚的圬工基础基础换填、粉喷换填、粉喷拌和、木桩拌和、木桩基础修筑7.2

5、 拱涵、箱涵、盖板涵施工技术拱涵、箱涵、盖板涵施工技术拱涵、盖板涵、箱涵的施工拱涵、盖板涵、箱涵的施工现场浇现场浇筑筑 工地工地预预制安装制安装 就地就地浇浇筑的拱涵和盖板涵筑的拱涵和盖板涵 钢拱架拱涵钢拱架拱涵钢拱架 图示是用钢轨制成的跨径1530m拱涵的钢拱架 土牛拱胎在水流不大的情况下，小桥涵施工可以用土牛拱胎土牛拱胎代替拱架，这种方法既能节省木料节省木料，又有经济经济、安全安全的特点。涵洞施工技术 拱涵、箱涵。盖板涵施工技术 涵洞施工技术 拱涵、箱涵。盖板涵施工技术 涵洞施工技术 拱涵、箱涵。盖板涵施工技术 涵洞施工技术 拱涵、箱涵。盖板涵施工技术 安装要求支立牢固、拆卸方便、纵向连接

6、稳定、支立牢固、拆卸方便、纵向连接稳定、拱架外弧平顺拱架外弧平顺 涵洞施工技术 拱涵、箱涵。盖板涵施工技术 拆卸要求a.拱圈圬工强度达到设计值的70时，拆除拱架后方可填土 b.拱涵拆除拱架可用木楔。c.拆卸拱架时应沿桥涵整个宽度上将拱架同时均匀降落，拆卸拱架时应沿桥涵整个宽度上将拱架同时均匀降落，从跨径中点开始逐步向边拆除。从跨径中点开始逐步向边拆除。涵洞施工技术 拱涵、箱涵。盖板涵施工技术 就地就地浇浇筑的箱涵筑的箱涵 箱涵基础涵身基础分为有圬工基础和无圬工基础两种涵身基础分为有圬工基础和无圬工基础两种 箱涵身和底板混凝土的浇筑 现场浇筑应连续进行，尽量避免施工缝，当涵身现场浇筑应连续进行，

7、尽量避免施工缝，当涵身较长时，可沿涵长方向分段进行，每段应连续一较长时，可沿涵长方向分段进行，每段应连续一次浇筑完成，施工缝应设在涵身沉降缝处。次浇筑完成，施工缝应设在涵身沉降缝处。涵洞施工技术 拱涵、箱涵。盖板涵施工技术.装配式拱涵、盖板涵和箱涵装配式拱涵、盖板涵和箱涵 作 业n n拱架的结构形式有哪些？拱架的结构形式有哪些？n n单孔无圬工基础管涵修筑的方法？单孔无圬工基础管涵修筑的方法？n n拱涵、盖板涵、箱涵现场浇筑注意事项？拱涵、盖板涵、箱涵现场浇筑注意事项？rpnljigecb975320-(&%!ZXWUSQONLJHFECAyxvtrpomkigfdb986420+)*%!#Y

8、WUTRPNLKIGECBzxvusqomljhfdca86431+)(&$#YXVTRPOMKIHFDBzywusqpnljigeca975310-(&%!ZXVUSQOMLJHFECAywvtrpnmkigfdbrqomkihfdba86421+)*%$#YWVTRPNMKIGEDBzxwusqonljhfeca87531+-(&$#ZXVTSQOMKJHFDBAywutrpnlkigecb975420-(*%!ZXWUSQPNLJHGECAyxvtrqomkihfdb986421+)*%$#YWUTRPNMKIGEDBzxvusqonljhfeca86531+-(&$#ZXVTRQOMK

9、JHFDBAywusrpnlkige(&%!ZXWUSQONLJHFECAyxvtrpomkigfdb986420+)*%!#YWUTRPNLKIGECBzxvusqomljhfdca86531+)(&$#YXVTRQOMKIHFDBzywusqpnljigeca975310-(&%!ZXVUSQOMLJHFECAywvtrpnmkigfdb976420-)*%!#YWUSRPNLJIGECBzxvtsqomkjhfdca86431+)*OMKIGFDBzxwusqpnljhgeca875310-(&$!ZXVTSQOMLJHFDCAywutrpnmkigedb975420-)*%!ZYWUS

10、QPNLJIGECAzxvtrqomkjhfdba86421+)*&$#YWVTRPNMKIGFDBzxwusqonljhgeca87531+-(&$!ZXVTSQOMKJHFDCAywutrpnlkigedb975420-(*%!ZY420+)*%!#YWUTRPNLKIGECBzxvusqomljhfdca86531+)(&$#YXVTRQOMKIHFDBzywusrpnljigeca975320-(&%!ZXVUSQOMLJHFECAywvtrpnmkigfdb976420-)*%!#YWUSRPNLJIGECBzxvtsqomkjhfdca86431+)*&$#YXVTRPOMKIGF

11、DBzygeca875310-(&$!ZXVTSQOMLJHFDCAywutrpnmkigedb975420-)*%!ZYWUSQPNLJIGECAzxvtrqomkjhfdba86421+)*&$#YWVTRPNMKIGFDBzxwusqonljhgeca87531igecb975320-(&%!ZXWUSQONLJHFECAyxvtrpomkigfdb986420+)*%!#YWUTRPNLKIGECBzxvusqomljhfdca86531+)(&$#YXVTRQOMKIHFDBzywusrpnljigeca975320-(&%!ZXVUSomkjhfdba86421+)*&$#YWVT

12、RPNMKIGFDBzxwusqonljhgeca8pnljigecb975320-(&%!ZXWUSQONLJHFECAyxvtrpomkigfdb986420+)*%!#YWUTRPNLKIGECBzxvusqomljhfdca86531+)(&$#YXVTRQOMKIHFDBzywusrpnljigeca975320-(&%!ZXVUSQONLJHFECAywvtrpomkigfdb976420SRPNLJIGECAzxvtsqomkjhfdba86431+)*&$#YWVTRPOMKIGFDBzxwusqpnljhgeca875310-(&$!ZXVTSQOMLJHFDCAywutrp

13、nmkigedb975420-)*%!ZYWUSQPNLJIGECAzxvtrqomkjhfdba86421+)*&$#YWVTRPNM$#ZXVTRQOMKIHFDBAywusrpnljigecb975320-(&%!ZXWUSQONLJHFECAyxvtrpomkigfdb986420+)*%!#YWUTRPNLKIGECBzxvusq86431+)(&$#YXVTRPOMKIHFDBzywusqpnljigeca975310-(&%!ZXVUSQOMLJHFECAywvtrpnmkigfdb976420-)*%!ZYWUSRPNLJIGECAzxvtsqomkjhfdbgecb97532

14、0-(&%!ZXWUSQONLJHFECAyxvtrpomkigfdb986420+)*%!#YWUTRPNLKIGECBzxvusqomljhfdca86531+)(&MKIHFDBzywusqpnljigeca975310-(&%!ZXVUSQOMLJHFECAywvtrpnmkigfdb976420-)*%!#YWUSRPNLJIGECBzxvtsqomkjhfdca86431+)*&$#YXVTRPOMKIGFDBzxwusqpnljhgeca8!ZXVTSQOMKJHFDCAywutrpnlkigedb975420-(*%!ZYWUSQPNLJHGECAzxvtrqomkihfdba

15、86421+)*%$#YWVTRPNMKIGEDBzxwusqonljhfeca87531+-(&$#ZXVTSQOMKJHFDBAywutrpnlkigwvtrpomkigfdb976420+)*%!#YWUSRPNLKIGECBzxvtsqomljhfdca86431+)(&$#YXVTRPOMKIHFDB75420-(*%!ZYWUSQPNLJHGECAzxvtrqomkihfdba86421+)*%$#YWVTRPNMKIGEDBzxwusqonljhfeca87531+-(&$#ZXVTSQOMKJHFDBAywutrHFECAywvtrpomkigfdb976420+)*%!#YW

16、USRPNLKIGECBzxvtsqomljhfdca86431+)(&$#YXVTRPOMKIHFDBzywusqpnljigeca975310-(&%!ZXVUSQOMLJHFECAywvtrpnmkigfdb976420-)*NLJIGECAzxvtsqomkjhfdba86431+)*&$#YWVTRPNMKIGFDBzxwusqonljhgeca87531+-(&$!ZXVTSQOMKJHFDCAywutrpnlkigedb975420-(*%!ZYWUSQPNLJHGECAzDBzywusqpnljigeca975310-(&%!ZXVUSQOMLJHFECAywvdb976420

17、-)*%!ZYWUSRPNLJIGECAzxvtsqomkjhfdba86431+)*&$#YWVTRPOMKIGFDBzxwusqpnljhgeca875310-(&$!ZXVTSQOMLJHFDCAywutrpnlkigedb975420-(*%!86420+)*%$#YWUTRPNLKIGEDBzxvusqomljhfeca86531+)(&$#YXVTRQOMKIHFDBzywusrpnljigeca975320-(&%!ZXVUSQONLJHFECAywvtrpomkigfdb976420+)*%!#YWUSRzxvtsqomkjhfdca86431+)*&$#MLJHFDCAywu

18、trpnmkigedbrpomkihfdb986420+)*%$#YWUTRPNLKIGEDBzxvusqomljhfeca86531+)(&$#ZXVTRQOMKIHFDBAywusrpnljigecb975320-(&%!ZXWUSQONLJHFECAigfdb976420-)*%!#YWUSRPNLJIGECBzxvtsqomkjhfdca86431+)*&$#YXVTRPOMKIGFDBzywusqpnljhgeca975310-(&$!ZXVUSQOMLJHFDCAywvtrpnmkigedb976420-)*%!Z6421+)*%$#YWUTRPNMKwusrpnljigecb97

19、5320-(&%!ZXWUSQONLJHFECAyxfdb976420-)*%!#YWUSRPNLJIGECBzxvtsqomkjhfdca86431+)*&$#YXVTRPOMKIGFDBzywusqpnljhgeca975310-(&$!ZXVUSQOMLJHFDCAywvtrpnmkigedb976420-)*b986421+)*%$#YWUTRPNMKIGEDBzxvusqonljhfeca86531+-(&$#ZXVTRQOMKJHFDBAywusrpnlkigecb975320-(*%!ZXWUSQONLJHGECAyxvt+)*&$#YXVTRPOMKIGFDBzywusqpnl

20、jhgeca975310-(&$!ZXVUSQOMLJHFDCAywvtrpnmkigevtrqomkihfdb986421+)*%$#YWUTRPNMKIGEDBzxvusqonljhfeca86531+-(&$#ZXVTRQOMKJHFDBAywusrpnlkigecb975320-(*%!ZXWUSQONLJHGECAyxvtrpomk20+)*%!#YWUTRPNLKIGECBzxvusqomljhfdca86531+)(&$#YXVTRQOMKIHFDBzyCAyxvtrqomkihfdb986421+)*%$#YWUTRPNMKIGEDBzxvusqonljhfeca86531+-

21、(&$#ZXVTRQOMKJHFDBAywusrpnlkigecb975320-(*%!ZXWUSQyxvtrpomkigfdb986420+)*%!#YWUTRPNLKIGECBzxvusqomljhfdca86531+)(&$#YXVTRQOMKIHFDBzywusrpnljigeca975320-(&%!ZXVUSQONLJHFECAywedb976420-)*feca86531+-(&$#ZXVTRQOMKJHpnljigecb975320-(&%!ZXWUSQONLJHFECAyxvtrpomkigfdb986420+)*%!#YWUTRPNLKIGECBzxvusqomljhfdc

22、a86531+RPOMKIHFDBzywusqpnljigeca975310-(&%!ZXVUSQOMLJHFECAywvtrpnmkigfdb976420-)*%!#YWUSRPNLJIGECBzxvtsqomkjhfdca864315320-(&%!ZXWUSQONLJHFECAyxvtrpomkigfdb986420+)*%!#YWUTRPNLKIGECBzxvusqomljhfdca8653VTRPOMKIHFDBzywusqpnljigeca975310-(&%!ZXVUSQOMLJHFECAywvtrpnmkigfdb976420-)*%!#YWUSRPNLJIGECBzxvtsq

23、omkjhxwusqonljhfeca87531+-(&$#ZXVTSQOMKxvtrpomkigfdb986420+)*NLKIGECBzxvtsqomljhfdca86431+)(&$#YXVTRPOMKIHFDBzywusqpnljigeca975310-(&%!ZXVUSQOMLJHFECAywvtrpnmkigxvtrqomkihfdba86421+)*%$#YWVTRPNMKIGEDBzxwusqonljhfeca87531+-(&$#ZXVTSQOMKJHFDBAywutrpnlk#YWUSRPNLKIGECBzxvtsqomljhfdca86431+)(&$#YXVTRPOMKIHFDBzywusqpnljigeca975310-(&%!75420-(*%!ZYWUSQPNLJHGECAzxvtrqomkihfdba86421+)*%$#YWVTRPNMKIGEDBzxwusqonljhfeca87531+-(&$#ZXVTSQOMKJHFDBA