筒仓贮料侧压力系数研究

Study on Lateral Pressure Ratio of Stored Material in Silos

本文提出一种根据总摩擦力确定筒仓贮料侧压力系数k值的方法，给出了两种仓壁情况下k值测试分析结果及一组筒仓贮料压力模型实验测试数据。文中说明，采用相应测试k值按詹森（Janssen）公式计算的贮料压力与模型实验测试数据相近。作者将现有各种k值确定方法与两种仓壁测试k值进行数值比较后，推荐采用按静止土压力系数乘以系数λ的取值方法。

This paper puts forwared a method of determining the value of k which accounts for the lateral pressure ratio of the stored material in silos based on the total frictional forces. The total frictional forces are obtained by the measurement and analysis of the test results under two different wall surface conditions. Furthermore, a group of tests for the lateral pressure in a model of silo has also been carried out. It shows that the lateral pressure values calculated by Janssen formula with the test value k are consistant with the test results from the model. The writers recommand to determine kbased on static soil pressure ratio multiplied by a coefficient λ after comparing the values determinedby various existing methods with the tWo test values of k.