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.

• 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。