董金玉, 赵志强, 黄志全, 郑珠光, 杨继红. 2016: 不同侧压系数条件下深埋洞室围岩应力和变形特征数值分析. 工程地质学报, 24(s1): 983-989. DOI: 10.13544/j.cnki.jeg.2016.s1.142
    引用本文: 董金玉, 赵志强, 黄志全, 郑珠光, 杨继红. 2016: 不同侧压系数条件下深埋洞室围岩应力和变形特征数值分析. 工程地质学报, 24(s1): 983-989. DOI: 10.13544/j.cnki.jeg.2016.s1.142
    DONG Jinyu, ZHAO Zhiqiang, HUANG Zhiquan, ZHENG Zhuguang, YANG Jihong. 2016: NUMERICAL SIMULATION OF STRESS AND DEFORMATION OF THE SURROUNDING ROCK IN DEEP-BURIED TUNNEL AT DIFFERENT LATERAL PRESSURE COEFFICIENT. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 983-989. DOI: 10.13544/j.cnki.jeg.2016.s1.142
    Citation: DONG Jinyu, ZHAO Zhiqiang, HUANG Zhiquan, ZHENG Zhuguang, YANG Jihong. 2016: NUMERICAL SIMULATION OF STRESS AND DEFORMATION OF THE SURROUNDING ROCK IN DEEP-BURIED TUNNEL AT DIFFERENT LATERAL PRESSURE COEFFICIENT. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 983-989. DOI: 10.13544/j.cnki.jeg.2016.s1.142

    不同侧压系数条件下深埋洞室围岩应力和变形特征数值分析

    NUMERICAL SIMULATION OF STRESS AND DEFORMATION OF THE SURROUNDING ROCK IN DEEP-BURIED TUNNEL AT DIFFERENT LATERAL PRESSURE COEFFICIENT

    • 摘要: 基于圆形和矩形两种典型断面洞室,利用岩土数值分析FLAC3D软件,模拟了不同侧压系数条件下其围岩的应力和变形特征。结果表明:侧压系数小于1时,洞室开挖后围岩的大主应力最大值、剪应变增量最大值分布在洞室左右两侧,位移最大值分布在洞室顶部,剪应变增量分布区域近似为长轴与Z轴平行的椭圆;大于1时,大主应力最大值、剪应变增量最大值分布在洞室顶部和底部,位移最大值分布在洞室左右两侧,剪应变增量分布区域近似为长轴与X轴平行的椭圆;进一步分析和得到了洞室围岩最大主应力、剪应力、位移以及剪应变增量在不同侧压系数下的变化规律。研究成果对地下洞室水平应力影响的研究和洞室断面形状的选择有一定的意义。

       

      Abstract: Taking the round tunnel and square tunnel as an example, the stress and deformation of the surrounding rock in deep-buried tunnel at different lateral pressure coefficient are simulated by FLAC3D.The research showed that the stress and deformation are relationship with the side pressure coefficient. When 1,the maximum of major principal stress and shear strain increment of the surrounding rock are located in the left and right sides of the tunnel, the maximum of displacements are located in the top of the tunnel, meanwhile, the distribution of the shear strain increment is approximately like an oval with it's longer axis are parallel to the Z-axis; When 1,the maximum of major principal stress and shear strain increment of the surrounding rock are located in the top and bottom of the tunnel, the maximum of displacements are located in the left and right sides of the tunnel, the distribution of the shear strain increment is approximately like an oval with it's longer axis are parallel to the X-axis. Furthermore, the variation law of major principal stress, shear stress, displacements and shear strain increment of the surrounding rock at different lateral pressure coefficient were analyzes and obtained. The research results can be helpful to the study on the relationship between horizontal stress and cavern excavation; also, it can be useful on the selection of cross sectional shape of tunnel.

       

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