堆载作用下加筋高填方边坡区桩身被动荷载研究

Passive Load on Piles in Reinforced High Fill Slope Area under Stacking Action

加筋土技术在码头陆域高填方工程中得到越来越广泛的应用,而在加筋高填方区内修筑码头桩基,在堆载作用下码头桩身的被动荷载确定是其内力与变形求解的关键因素。基于局部塑性理论,开展了堆载作用下加筋填方区桩身水平被动荷载的计算推导,并得出了桩基剩余推力及剩余水平附加应力计算方法。通过室内物理模型试验,开展了堆载作用下加筋高填方区桩身被动荷载研究,验证了理论推导计算方法的正确性。最后,通过数值模拟计算的方法,开展了不同因素下桩身被动荷载影响分析和合理桩间距研究探讨。

Reinforced soil technology has been widely used in high-fill projects in the land area at harbor.In order to construct wharf’s pile foundation in reinforced high-fill area,the passive load on pile body under stacking action is the key factor for the solution to its internal force and deformation.Local plasticity theory is used to calculate and derive the horizontal passive load on pile body in reinforced fill area under stacking action,which leads to the calculation method for residual thrust and horizontal extra-stress on pile foundation.The above passive load is studied on the basis of indoor physical model test,which verifies the derivation and calculation method.Finally,the application of numerical simulation calculation method promotes the analysis of passive load on pile body affected by different factors and the research on reasonable spacing between piles.