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土工格室柔性挡墙极限主动土压力计算方法

, PP. 24-28

Keywords: 路基工程,土工格室,柔性挡墙,极限主动土压力,计算方法

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Abstract:

利用有限元法分析了土工格室柔性挡墙水平变位特征,得到了墙体中部水平变位的分界点,提出了主动土压力的计算方法。分界点上部位移模式接近平动,采用库仑主动土压力理论计算上部的土压力,分界点下部位移模式接近绕墙脚的转动,采用水平微分单元法计算下部的土压力,并比较了计算结果与实测结果。比较结果表明土压力计算结果与实测结果沿墙高的分布形态及增长趋势基本一致,计算值比实测值略偏小一些,偏差最小为0.2kPa,最大为2.9kPa,平均偏小为1.2kPa,可见土压力计算方法可靠。

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