被动桩土拱效应有限差分模拟研究

Numerical simulation study on soil arching effect of passive piles

采用有限差分软件FLAC3D,分析外荷载、桩间距和土体性质对土拱效应的影响,分析表明,在一定范围内随着外荷载的增加,桩体荷载分担比不断变大,土拱效应不断增强;随着桩间距的增大,土拱效应逐渐减弱;土体内摩擦角对土拱效应具有加强作用。

Using the finite difference software FLAG^3D, this paper analyzed the influence of external load, pile spacing and soil properties to soil arching effect, the analysis showed that, in a certain range with the increase of external loads, the pile load sharing ratio became larger and larger, the soil arch effect increased ceaselessly, with the pile spacing increased gradually, the soil arch effect weakened, the internal friction angle had strengthen effect to soil arching effect.