中文摘要：

基于最小势能原理，分析了路堤填土、水平加筋体、桩（桩顶托板）及桩间土之间的相互作用，得到了桩体荷载分担比。研究了桩间距、路堤高度、桩顶托板宽度、路堤填土剪切模量、水平加筋体拉伸强度及桩土相对刚度对桩体荷载分担比的影响。结果表明：桩间距、路堤高度、托板宽度及桩土相对刚度对桩体荷载分担比影响较大，路堤填土剪切模量的影响次之，而水平加筋体拉伸强度的影响很小。设计桩承式加筋路堤时，主要应通过增大路堤高度与桩间距之比及桩顶托板宽度与桩间距之比来提高桩体荷载分担比。

英文摘要：

The interaction among embankment fill, horizontal geotextile, pile （cap） and subsoil was analyzed based on the principle of minimum potential energy, and pile efficacy was obtained. The effects of piles interval, embankment height, cap width, shear modulus of embankment fill, horizontal geotextile tensile strength and pile subsoil stiffness ratio on pile efficacy, were also carried out. The results show that pile efficacy is significantly affected by piles interval, embankment height ,cap size and pile-subsoil stiffness ratio, while shear modulus of embankment fill has less effect and geotextile strength has a little effect. In practice, the larger pile efficacy should be achieved mainly by increasing the ratios of embankment height to piles interval and cap width to piles interval.