上海地铁2#线淤泥质地层地铁隧道浅埋暗挖施工技术方案研究

结合上海地铁2#线西延伸工程威宁路站3#出入口通道工程,介绍了在上海含水淤泥质地层条件下,采用管幕超前预支护、掌子面深孔注浆加固、短开挖、强支护等综合浅埋暗挖施工技术。并应用大型有限元软件——ANSYS,采用有限元数值方法对其施工效应进行了计算分析。分析结果表明,施工过程中洞室结构稳定,浅埋暗挖管幕预支护施工方法可行,并可实现洞内施工安全和施工地面沉降的控制要求,解决了明挖施工对城市交通的干扰,所得结果可为后续类似工程提供一定的理论参考。

STUDY ON CONSTRUCTION TECHNIQUE SCHEME OF SHALLOW EMBEDDED TUNNEL OF SHANGHAI SUBWAY #2 LINE IN SILTY STRATUM

Based on Weining station #3 passageway of #2 line west extending engineering in Shanghai subwayt,he synthetic construction techniques of pipe pre-support,deep hole grouting in working face,short excavation and strong support are used in silty stratum.The construction effect is analyzed using finite element program-ANSYS;and a lot of significant results are gained which can prove that the structure of tunnel is steady during construction and the surface settlement meets the demand of the city environment,and the designed scheme is satisfied with the safety of construction inside tunnel and control standards of surface subsidence,which can solve the problems of urban transportation caused by open-excavated subway tunnel.And the results can act as theoretic basis and reference for the design and construction of similar projects later.