【摘要】 南水北调中线穿黄工程洞为全段面输水高压输水隧洞,最大埋深为35m,承受最大外部水压力为0.45MPa。设计隧洞衬砌分为内衬和外衬两部分,外部水压力由预制混凝土管片承担,因此外衬管片的施工质量非常重要。管片的施工质量包括两方面工作:一是在管片生产过程中的质量控制,二是在盾构掘进过程中管片的安装质量,其中管片的制作质量是管片质量控制的基础。现主要论述了管片生产过程的质量控制,从管片混凝土配合比设计、混凝土浇筑、管片蒸养、脱模后养护等几个方面阐述了管片生产过程中的质量控制,对国内同类工程施工中管片制作质量控制有一定的借鉴意义。更多还原

【Abstract】 Yellow River Crossing Project of Diversion Water from South to North are high pressure water tunnels,the max depth is 35 m underneath,the max water pressure is 0.45 MPa.There are two layers concrete lining for the tunnel,outer concrete liner and inner one.Outer water pressure is bored by concrete segment,so the construction quality of the concrete segment is very important.The article mainly explains the quality in process from concrete mixture design to concrete set,etc.and can provide some reference to similar projects.更多还原