桩承式加筋路堤等沉面高度影响因素分析

Analysis on Factors Affecting Height of Equal Settlement Section in Pile-supported Reinforced Embankment

以台缙高速公路桩承式加筋路堤工程为依托,利用有限差分软件FLAC3D建立了桩承式加筋路堤三维数值模型,研究了桩帽净间距、路堤填土内摩擦角、路堤填土粘聚力、水平加筋体拉伸强度对等沉面高度的影响。计算结果表明:等沉面高度与桩帽净间距的比值为3.0～3.7;路堤填土内摩擦角越大,等沉面高度越小;路堤填土粘聚力、水平加筋体拉伸强度的大小对等沉面高度没有影响。

Based on the pile-supported reinforced embankment project along Taizhou-Jinyun Highway, a 3D numerical model thereof is established with finite difference software FLAC3D so as to study how clear spacing of pile cap, internal friction angle of embankment fill, cohesion of the fill and tensile strength of horizontal reinforcement affect height of equal settlement section. The results show that ratio of the equal settlement section height to the clear spacing is 3.0- 3.7; and as the internal friction angle increases, this height decreases; however, the cohesion and the tensile strength have no influence on this height.