桥梁快速施工技术在鱼山大桥中的创新应用课件.pptx
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1、桥梁快速施工技术在鱼山大桥中的创新应用,2108.11,汇报内容Outline,01,项目背景Project context,宁波舟山港主通道线位图,Main aisle linemap of Ningbo-Zhoushan Port,Connect with Fuchimen bridge,Zhoushan-Daishan bridge,Yushan bridge,鱼山大桥线位图,岱北大围垦,linemap of Yushan bridge,Yushan bridge,工程难点,鱼山大桥孤悬海外 Yushan bridge stand lonely on the sea.岱山和鱼山距离本岛在
2、16km以上 Daishan and yushan are more than 16km away from the island.桥位缺乏遮蔽 Bridge position lack of shelter.,支撑条件缺乏Lack of support conditions,建设条件复杂Complex conditions,建设规模浩大Great scale of construction,建设工期紧迫Urgent construction period,Engineering difficulties,风力 6级为173天, 8级为66天。 Wind power 6 is 173 days
3、 Wind power 8 is 66 days有效工作日仅200天左右。 The effective working day is only about 200 days.,季风、台风 monsoon and typhoon,桥位水流速度大High speed of water flow at bridge site,最大设计流速2.84m/s Maximum design flow rate is 2.84m/s大于其他跨海大桥的设计流速。 Design flow rates higher than other sea- crossing bridges.,基岩埋深大于100m,最大埋深1
4、40m The buried depth of bedrock is more than 100m, and the maximum buried depth is 140m岩性复杂,可分为6大类12小类。 The complex lithology can be divided into 6 categories and 12 sub-categories.,地质条件复杂Complex geological conditions,工程难点,支撑条件缺乏Lack of support conditions,建设条件复杂Complex conditions,建设规模浩大Great scale o
5、f construction,建设工期紧迫Urgent construction period,Engineering difficulties,通航孔桥跨越舟山国家柔性直流输电示范工程舟岱线海底电缆Navigation zone aross the ntricate submarineDC cables,海底电缆DC cable,路线总长8.815km,海域桥长7.782km,墩台共114个 The overall length of the route is 8.815 km, and the bridge length of sea area is 7.782 km, and there
6、 are a total of 114 piers.上部结构全部节段预制拼装,共计2370榀节段梁,及89m长钢箱梁 All sections of the superstructure are prefabricated and assembled, with a total of 2,370 trusses of segmental beams and 89m steel box beams下部结构包括170余根超大超长桩基,最大桩径5m,最大桩长148.2m The substructure consists of more than 180 super-long piles with
7、a maximum pile diameter of 5m and a maximum length of 148.2m.,工程难点,支撑条件缺乏Lack of support conditions,建设条件复杂Complex conditions,建设规模浩大Great scale of construction,建设工期紧迫Urgent construction period,Engineering difficulties,通车Open to traffic,2016/9,2018/12,开工Commencement of Work,2017/1,2018/1,27months,跨海大桥
8、7782米/1座The bridge is 7782 meters across the sea,无案例可借鉴No case to learn,工程难点,支撑条件缺乏Lack of support conditions,建设条件复杂Complex conditions,建设规模浩大Great scale of construction,建设工期紧迫Urgent construction period,Engineering difficulties,支撑条件缺乏Lack of support conditions,建设条件复杂Complex conditions,建设规模浩大Great sca
9、le of construction,建设工期紧迫Urgent construction period,快速、高质量完成complete this huge project quickly with better quality,创新“三减少”管理理念 “three reductions” management concept,三减少Threereductions,海上作业工序减少到最少Minimize construction works at sea,海上作业人数减到最少Minimize the number of constructors at sea,海上作业时间减到最短Minimiz
10、e construction time at sea,设计方面Bridge Design,施工组织 Construction Organization,设计方面Design aspects,鱼山大桥全桥分为3个区域,通航孔桥,岱山侧通航孔桥,鱼山侧通航孔桥 The bridge is divided into 3 zones, navigationzone , non-navigationzone near by Daishan island and non-navigationzone near by Yushan island.非通航孔桥分为靠近通航孔桥的深水区和靠近岸边的浅水区 Non-
11、navigation zone is divided into deep water zone and shallow water zone.,桥梁区域划分Zones of the bridge,上部结构 Superstructure,下部结构 Substructure,全桥节段梁segmental girder of full bridge,通航孔桥navigation bridge,非通航孔桥non-navigable bridge,主跨260main span 260m,深水区:70mDeep water: 70m span,群桩承台结构Group pile platform struc
12、ture,桩径: 3.8-3.0pile diameter: 3.8-3.0双曲面花瓶墩:3.6Double curved vase pier: 3.6,桩径: 4.5-4.0 5.0-3.8Pile diameter:4.5-3.8 5.0-3.8双曲面花瓶墩:3.6Double curved vase pier: 3.8,单桩独柱结构Single pile single column structure,浅水区:50m跨Shallow water: 50m span,项目背景Project context,标准化设计,项目背景Project context,通航孔桥设计Zones of t
13、he bridge,通航孔桥跨布置为70+140+180+260+180+140+70m,总长1040m,通航孔桥涵盖了水深大于15m的深槽,且桥梁跨径缓缓变化,协调大方,相较工可减少了4个桥墩,降低了船撞风险。,项目背景Project context,非通航孔桥设计Zones of the bridge,岱山侧非通航孔桥布置为:3(450)+2(550)+4(470)+2(570)m,总长2920m;鱼山侧非通航孔桥布置为:4(570)+3(470)+(370+64.75)+550+4(450)+50+7+50+3(50)m,总长3821.75m,桩基施工25天Pile foundation
14、 construction 25 days,墩身施工7天Construction of the pier 7 days,常规桥梁Conventional bridge,鱼山大桥Yushan bridge,项目背景Project context,统筹设计,减少作业时间Overall design for reducing construction period,项目背景Project context,施工工效分析Construction efficiency analysis,上部结构100%预制,混凝土箱梁节段预制,钢箱梁整节预制。 100% prefabricated for Superst
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