复杂环境下地铁基坑工程施工设计方案
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摘要
针对城市中心区域地铁建设面临的环境保护要求高,管线复杂,交通影响要求严格等各种难题。以在建的南京地铁5号线云南路站工程为背景,从改迁电力管线和原位保护电力管线的两条主线,结合明挖法、盖挖法、暗挖法地铁施工方法进行了施工方案设计。提出多种地铁施工方法结合的施工方案,基坑围护结构不封闭处理措施,电力管廊悬吊保护方案,从施工风险、工期要求、费用指标等方面综合分析各种施工方案的利弊,综合比较后采用明盖挖逆作结合的方案。
In view of various problems which thefuture Metro construction in urban central areas is faced with,such as high environmental protection requirements,complex pipelines and strict traffic impact requirements etc.,and with the project of Yunnan Road Station of Nanjing Metro line 5 under construction as the background,the design of construction scheme is carried outfrom the two main lines such as power pipeline relocation and in situ power pipeline protectionin combination with the subway construction methods such as the open-cut method,cover cut method and subsurface cut method. The construction scheme of combining several subway construction methods,treatment measures for not closing the foundation pit enclosure structure and suspension protection scheme for power pipe gallery are put forward. The advantages and disadvantages of various construction schemes are analyzed comprehensively in terms of construction risk,construction period requirement and cost index etc.,after which the scheme of open-cut method in combination with cover-cut top-down method is adopted.
In view of various problems which thefuture Metro construction in urban central areas is faced with,such as high environmental protection requirements,complex pipelines and strict traffic impact requirements etc.,and with the project of Yunnan Road Station of Nanjing Metro line 5 under construction as the background,the design of construction scheme is carried outfrom the two main lines such as power pipeline relocation and in situ power pipeline protectionin combination with the subway construction methods such as the open-cut method,cover cut method and subsurface cut method. The construction scheme of combining several subway construction methods,treatment measures for not closing the foundation pit enclosure structure and suspension protection scheme for power pipe gallery are put forward. The advantages and disadvantages of various construction schemes are analyzed comprehensively in terms of construction risk,construction period requirement and cost index etc.,after which the scheme of open-cut method in combination with cover-cut top-down method is adopted.
引文
[1] 霍亚超.明盖结合装配式铺盖法地铁车站施工几个关键问题研究[D].北京:北京交通大学,2012.
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[2] 汪玉华.洞桩法地铁车站设计施工关键技术[J].施工技术,2015,44(19):97-100.
[3] 张宝森.地铁车站盖挖逆作施工安全风险分析与控制研究[D].徐州:中国矿业大学,2016.
[4] 刘才平,付艳军,方超刚.高压电力管沟原位保护施工技术[J].水利水电施工,2016(5):87-90.
[5] 骆建军,张顶立,王梦恕.地铁施工对管线的影响[J].中国铁道科学,2006(6):124-128.
[6] 徐正良,刘涛,周生华.管线穿越条件下围护结构局部开口的可行性分析[J].建筑结构.2009(2):66-69.