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长大竖井围岩稳定性有限元分析
Authors
周舒威
徐宏斌
李庶林
Publication date
15 August 2010
Publisher
Abstract
对以混凝土为内衬支护结构的长大竖井井筒,采用理想弹塑性材料本构关系及Drucker-Prager屈服准则建立三维有限元模型,对围岩受力及变形特征进行分析,给出围岩的应力与位移分布特征、竖井周边特征点的变形(位移)大小及破坏区的范围;对比讨论了现浇混凝土支护结构不同支护厚度对围岩稳定性的影响,分析计算结果表明围岩稳定性良好,竖井的初步设计是合理的,改变支护厚度对纵向及总位移影响较大,随支护厚度的增加围岩应力分布更均匀。按一定深度建立竖井水平剖面的二维模型对井筒的稳定性进行分析,将二维与三维分析结果进行对比分析,其结果表明二维分析存在较大误差,说明了二维简化分析的不合理性
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Last time updated on 16/06/2016