沉入式圆筒结构抗倾有效比及其确定

DETERMINATION FOR EFFECTIVE RATIO OF RESISTANCE TO OVERTURN BURIED CYLINDER

沉入式圆筒结构的抗倾有效比是一个重要的参数 ,它对结构自身的抗倾稳定和变位大小有很大的影响。该参数目前在我国没有进行过深入研究 ,也没有可靠的确定方法可循。本文采用模型实验以实测筒内、外和筒底土压力为依据 ,分析了内填料和地基土与无底圆筒结构的互相作用 ,着重探讨了圆筒结构在倾覆过程中摩阻力调整机理及抗倾有效比的变化规律。在此基础上确定了抗倾有效比的计算方法。并与试验结果进行了比较 。

A model test is used to determine the effective ratio of resistance to overturn the buried cylinder.Many measured data are got from the earth pressure on the inside,outside,and bottom of the open cylinder.The interaction of the filled materials,the subsoil,and the open cylinder are studied.It is discussed in detail for the mechanism of the frictional resistance and the variations of effective ratio.A method for calculating the effective ratio is proposed in the paper.The computing results are well agreed with that of the measured one