红谷隧道采用沉管法施工,沉管段为钢筋混凝土结构,沉管段后浇带混凝土为补偿收缩混凝土。选用CC-12高性能膨胀剂配制限制膨胀率≥0.025%的补偿收缩混凝土,加强膨胀剂进站抽查检测,延长搅拌时间,分层浇筑、加强振捣养护,确保后浇带混凝土密实,沉管段连接处建立有效膨胀,提高隧道整体防水效果。 Honggu Tunnel adopts the method of immersed pipe construction, the pipe sinking section is a reinforced concrete structure, and the pipe sinking section of the immersed pipe is compensated shrinkage concrete. Select CC-12 high-performance expansion agent to limit the expansion rate of ≥0.025% compensation shrinkage concrete, strengthen the expansion agent into the spot checks, extend the mixing time, layered pouring, strengthen the vibration conservation, to ensure that after pouring with concrete dense, The junction to establish an effective expansion to improve the overall waterproofing effect of the tunnel.