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ADECO-RS工法在隧道洞口浅覆段施工的应用与对策 被引量:2

Applications and Strategies of ADECO-RS Approach for Construction of Tunnel Entrance with Shallow Overburden
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摘要 近年来,随着环境保育观念的提升,减少地表开挖的理念,已逐渐落实在隧道设计及施工实务上。以往,隧道洞口浅覆段采用明挖法,已逐渐被暗挖法直接穿越所取代。即使在地质、地形或环境条件上不尽理想之区段,基于整体路线考量,亦有非采用不可之情形。本文以台湾北部正施工中的双线双车道公路隧道为例,探讨ADECO-RS工法在隧道洞口浅覆进洞的应用与对策。由于该案例位处山凹处,属谷部地形,不仅覆盖极薄,开挖过程中更遭遇到废煤矿碴与多雨的气候,使得降雨所汇集的地表水,不断入渗至隧道内,开挖面自立性极差。几乎非原设计之NATM工法足以因应。但经采取ADECO-RS工法之管幂加劲、土心加固及拱盖培厚等超前约束与加固理念后,勉为通过,其处理经验与心得,希供后续类似案例之参考。 近年来,随着环境保育观念的提升,减少地表开挖的理念,已逐渐落实在隧道设计及施工实务上。以往,隧道洞口浅覆段采用明挖法,已逐渐被暗挖法直接穿越所取代。即使在地质、地形或环境条件上不尽理想之区段,基于整体路线考量,亦有非采用不可之情形。本文以台湾北部正施工中的双线双车道公路隧道为例,探讨ADECO-RS工法在隧道洞口浅覆进洞的应用与对策。由于该案例位处山凹处,属谷部地形,不仅覆盖极薄,开挖过程中更遭遇到废煤矿碴与多雨的气候,使得降雨所汇集的地表水,不断入渗至隧道内,开挖面自立性极差。几乎非原设计之NATM工法足以因应。但经采取ADECO-RS工法之管幂加劲、土心加固及拱盖培厚等超前约束与加固理念后,勉为通过,其处理经验与心得,希供后续类似案例之参考。
出处 《隧道建设》 2011年第S1期346-353,共8页 Tunnel Construction
关键词 新意法 浅覆隧道 管幂工法 新奥法 ADECO-RS method tunnel with shallow overburden pipe-roofing method NATM
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