土层摩阻力对圆形隧道的结构内力分析研究  

Study of Internal Force of Ring Tunnel in Stratum Skin Friction

作　　者：王瑜[1] 左红伟[1] 闫强刚 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]青岛市勘察测绘研究院,山东青岛266033

出　　处：《烟台大学学报（自然科学与工程版）》2007年第1期67-72,共6页Journal of Yantai University(Natural Science and Engineering Edition)

基　　金：国家自然科学基金资助项目(50574050)

摘　　要：将圆形隧道衬砌结构视为土体中的自由变形的弹性均质圆环,在考虑影响摩阻力主要因素的条件下,采用结构力学中的弹性中心法,推导在摩阻力作用下圆形隧道任意截面中的内力解析解.通过算例验算的结果表明,摩阻力对衬砌内力总体有减小的趋势,且顶部和侧壁减小的程度较大.因而在圆形隧道的设计中,计算衬砌内力时应考虑地层对衬砌的摩阻力影响,以便更加全面地配置衬砌材料.Lining structure of round tunnel is looked as freely changing isotropic elastic circular ring in soil. Based on the elastic centre method of structural mechanics, considering main factors affecting skin friction, the internal force formula of arbitrary section of round tunnel is deduced in the paper. From computation result of an example, it can be got that the affected trend of internal force of lining structure by skin friction is decreasing, especialy on the top and at the side of tunnel. At last, the authors suggest that the influence of skin friction should be consided in the calculation of internal force of lining structure in order to rationally allocate lining material in the design of round tunnel.

关 键 词：圆形隧道 内力 摩阻力 弹性中心法 

分 类 号：U451.57[建筑科学—桥梁与隧道工程]