Design Method and Application of Rock and Support System for Super large Span Tunnel(超大跨度隧道围岩支护体系构件化设计方法及其应用研究) |
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引用本文: | LYU Gang,LIU Jianyou,ZHAO Yong.Design Method and Application of Rock and Support System for Super large Span Tunnel(超大跨度隧道围岩支护体系构件化设计方法及其应用研究)[J].隧道建设,2018,38(9):1520-1528. |
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作者姓名: | LYU Gang LIU Jianyou ZHAO Yong |
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作者单位: | (1. 中铁工程设计咨询集团有限公司, 北京 100055; 2. 中国铁路经济规划研究院, 北京 100038) |
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摘 要: | In order to guarantee the stability of surrounding rock and support structure of super large span tunnel and realize quantification of support structure design, the optimal excavation contour line shape is obtained based on study of influence of initial ground stress on bearing arch of surrounding rock; a new quantitative design method, in which the surrounding rock is regarded as an arch structure, bolts, cables, shotcrete and lining are designed to satisfy the intensity, rigidity and stability of the arch structure, is presented to design the support structure system. The method has been successfully applied to super large span tunnel of Badaling Great Wall Station on Beijing Zhangjiajie High speed Railway; and the applicable results show that the maximum accumulative settlement of crown top of large span section is only 17.3 mm, and the relative subsidence of crown top is only 0.09%, which can meet safety requirements.
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关 键 词: | super large span tunnel optimal excavation contour line surrounding rock bearing arch supporting structure system |
收稿时间: | 2018-03-06 |
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