水域水位变化对邻近复合支承路堤刚性桩力学特性的影响研究

近水域公路路堤施工中，常出现支承路堤稳定性不足的问题，为研究支承路堤的邻域水位变化对其稳定性的影响规律，采取有限差分法构建了FLAC3D数值模型，分析邻域水位变化对路堤支承桩的力学影响和支承路堤的变形影响。结果表明:路堤周边水域的存在能显著改变支撑桩受力状态；路堤周边水域出现时间前后对支承路堤稳定性的影响存在差异；邻域水位骤降能明显增大支承桩发生弯曲破坏的可能性。

Research on the Influence of Water Level Change on the Mechanical Properties of Rigid Piles of Adjacent Composite Supporting Embankment

During the construction of highway embankments near waters, the problem of insufficient stability of supporting embankments often occurs. In order to obtain the influence of water level changes in the neighborhood of supporting embankments on its stability, a FLAC3D numerical model was constructed using the finite difference method and the mechanical influence of adjacent water level changes on the embankment supporting piles and the deformation influence on supporting embankments was analyzed. The results show that the existence of the surrounding waters of the embankment can significantly change the stress state of the supporting piles; the influence of the occurrence time of surrounding waters of the embankment on the stability of the supporting embankment was different; the sudden drop of the water level in the neighborhood can significantly increase the possibility of bending failure of the supporting piles.