曲线挡墙上主动散粒体压力分析及应用

ANALYSIS ON ACTIVE BULK-SOLID PRESSURES ON CURVY WALLS AND ITS APPLICATIONS

首先,利用极限平衡理论得到曲线挡墙上主动散粒体压力分布规律及计算方法,然后,通过对直线挡墙计算公式的修正,得到曲线挡墙情况下散粒体压力计算的简便方法。该简便方法主要考虑直线挡墙和曲线挡墙2种情况下滑动楔体的体积不同,从而在直线挡墙计算公式中引入1个体积修正系数以得到相应曲线挡墙的计算公式。由于直线挡墙墙背主动土压力的计算普遍采用著名的库仑理论,因此,该简便方法即在库仑公式中引入1个体积修正系数。最后,将上述理论应用于浅圆仓,计算结果与实测结果相符较好。

The method of wedges (or the limit equilibrium method) is employed to analyze the distribution of active bulk-solid pressure on curvy walls, and then the method called modified Coulomb's formula for curve retaining wall is developed by modifying the formula for beeline wall. The method considers the difference of the two slipping wedges behind the beeline wall and the curvy wall, and a volume-revising coefficient is introduced. Finally, the method is applied to the squat silo walls, and the results agree well with those of the full-sized silo experiment.