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隧道水平围岩压力计算方法(英文)

, PP. 10-17

Keywords: 隧道工程,围岩压力,中隔壁变形,水平荷载,压力计算方法

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Abstract:

分析了采用中隔壁法施工时隧道中隔壁的变形特性,研究了中隔壁变形和水平荷载之间的内在关系,提出了一种新的隧道水平围岩压力计算方法。采用结构力学分析理论,建立了中隔壁变形和水平围岩压力之间的关系,利用中隔壁变形监测数据,得到水平围岩压力。基于天恒山土质浅埋隧道Ⅴ级围岩,采用谢家?法计算的水平围岩压力为88~145kPa,采用新算法计算的水平围岩压力为110kPa。其中,当围岩摩擦角为45°时,采用谢家?法计算的水平围岩压力为115kPa,与采用新算法计算的水平围岩压力接近,两者相差5kPa,验证了新算法的可行性。

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