承受高内水压力的穿黄工程盾构隧洞结构型式研究

Study on Structural Types of Shield Tunnels under Yellow River Subjected to High Internal Water Pressure

针对对南水北调中线穿黄工程盾构隧洞内水压力较高的特点,对双衬联合受力方案、单衬受力方案及双衬单独受力方案结构型式进行了研究,分析了不同结构型式对隧洞内、外衬内力和变形以及管片接缝状态的影响,推荐穿黄工程隧洞采用结构受力明确、结构安全度高的双衬单独受力方案。

Due to the high internal water pressure applied to the lining of the shield tunnel under Yellow River on the middle line of south-to-north water diversion project, the study on structural types was carried out. The single lining, the combined bearing double-lining and the independent bearing double-lining are discussed. Through the analysis of the influence of different structural types on the deformation of inner lining and outer lining, internal force and the behavior of joints between segments, the independent bearing double-lining is proposed due to its explicit behavior and high security.