挡土墙土压力公式在大型筒仓侧压力计算中的应用分析

APPLICATION ANALYSIS OF EARTH PRESSURE COMPUTATION FORMULAE IN LARGE SQUAT SILOS

为合理计算大型筒仓散料侧压力,将Rankine土压力公式和Coulomb土压力公式计算值与实测值进行比较;对《钢筋混凝土筒仓设计规范》(GB50077–2003)附录C浅圆仓侧压力公式加以分析验证;采用静力平衡方法,对Rankine公式进行修正,得到侧压力强度的计算公式。研究结果表明:Rankine土压力公式和Coulomb土压力公式计算值比实测值大;附录C浅圆仓侧压力公式在应用时需要补充;采用静力平衡方法所得公式计算简练,其计算值与实测值、有限元计算结果吻合较好。

In order to reasonably compute the bulk-solid lateral pressure,the pressures predicted by Rankine and Coulomb formulae are compared with those by experiments,the formulae of the Appendix C of Code for Design of Reinforced Concrete Silos（GB50077–2003） are analyzed and verified;and a formula of lateral pressure acting on the wall of large squat silos is obtained based on the static equilibrium method.The results indicate that the pressures predicted by Rankine and Coulomb formulae are larger than the actual values;the formulae of the current code Appendix C need to be supplemented in application process;and the formula based on the static equilibrium method is succinct and the predicted pressures agree well with the actual values and the finite element method results.