铁道标准设计
鐵道標準設計
철도표준설계
RAILWAY STANDARD DESIGN
2015年
5期
111-114,115
,共5页
地铁%单拱大跨%拱墙开洞%倾斜二维钢架%分段拼装
地鐵%單拱大跨%拱牆開洞%傾斜二維鋼架%分段拼裝
지철%단공대과%공장개동%경사이유강가%분단병장
Metro%Large span single arch%Arch wall opening%Tilted two-dimensional steel arch frame%Segmental assembly
基于重庆地铁暗挖车站单拱大跨的特点，车站主体隧道在其拱墙部位开附属洞门时，势必会在主体与附属接口拱部形成临空面，尤其是大断面附属接口形成的长大临空面存在较大的施工风险；为有效降低隧道拱墙开洞的施工风险，实现“随挖随支、钢架步步封闭”的施工原则，结合工程实际提出倾斜二维钢架接口支撑体系，详细介绍大跨拱墙开洞时支撑钢架步步封闭的分段拼装施工工序，并通过对现场施工监测数据的分析，验证该技术的可靠性。
基于重慶地鐵暗挖車站單拱大跨的特點，車站主體隧道在其拱牆部位開附屬洞門時，勢必會在主體與附屬接口拱部形成臨空麵，尤其是大斷麵附屬接口形成的長大臨空麵存在較大的施工風險；為有效降低隧道拱牆開洞的施工風險，實現“隨挖隨支、鋼架步步封閉”的施工原則，結閤工程實際提齣傾斜二維鋼架接口支撐體繫，詳細介紹大跨拱牆開洞時支撐鋼架步步封閉的分段拼裝施工工序，併通過對現場施工鑑測數據的分析，驗證該技術的可靠性。
기우중경지철암알차참단공대과적특점，차참주체수도재기공장부위개부속동문시，세필회재주체여부속접구공부형성림공면，우기시대단면부속접구형성적장대림공면존재교대적시공풍험；위유효강저수도공장개동적시공풍험，실현“수알수지、강가보보봉폐”적시공원칙，결합공정실제제출경사이유강가접구지탱체계，상세개소대과공장개동시지탱강가보보봉폐적분단병장시공공서，병통과대현장시공감측수거적분석，험증해기술적가고성。
Due to the characteristics of large span single arch of Chongqing metro station where subsidiary portal is made in the arch wall of station main tunnel, a free face is created in the main body and the arch the construction risk of tunnel arch wall opening and prepare steel frame supporting immediate after excavation, this paper proposes the tilted two-dimensional steel arch frame supporting system based on engineering practices and introduces segmental construction process with supporting steel frame put in place with the progress of the opening. In addition, the reliability of the technology is verified by the analysis of field construction monitoring data.
