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无衬砌浅埋隧洞松散压力的数值分析法

DOI: 10.3969/j.issn.1674－0696.2012.03.07, PP. 380-384

Keywords: 极限平衡理论,弹塑性理论,折减,数值分析,松散压力,limitingequilibriumtheory,elastic-plastictheory,reduction,numericalanalysis,surroundingrockpressure

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Abstract:

:？将极限平衡理论和弹塑性理论相结合，利用ANSYS和FLAC3D数值分析软件来计算浅埋隧道松散压力。计算时先将土体强度参数进行折减，隧道开挖后不做衬砌，在拱顶施加与重力方向相反的节点力，通过调整施加的反力大小使隧道处于破坏极限状态，即极限平衡状态;通过软件是否收敛来判断隧道是否破坏。该方法考虑了土体材料的特殊性，有严格的力学依据，计算结果与实际情况更加接近，为求解浅埋隧道松散压力提供了一种新的方法。

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