Evaluation of design method of embankment including arch culverts with harmony of landscape

连拱式涵洞路堤是沿道路延伸方向连续安装多个预制拱涵的一种新型填筑结构。成功设计的关键是估算拱涵安装的实际间距，明确考虑地震影响时填筑材料与预制结构的相互作用行为。本文通过动力离心模型试验和动力有限元分析，研究了连拱涵洞间距对其受力性能的影响，并对其在地震作用下的受力性能进行了探讨。结果表明，单元间距较窄的情况下，由于刚性较小的填方处体积减小，拱涵弯矩和周围土体变形较小，整体上具有较高的刚度。

Multi-arch culverts embankment is a new type of filling structure where several precast arch culverts are installed continuously in the direction of the road extension. The key of the successful design is to estimate the practical interval between installed arch culverts and to clarify the interactive behavior between filling material and precast structure in considering the seismic influence. In this study, dynamic centrifugal model experiments and dynamic FEM analyses have been carried out to investigate the influence of spacing between multi-arch culverts and mechanical behavior under seismic conditions has been discussed. From the results, it was found out that the case with narrow unit interval has high rigidity as a whole because the volume in the fill part where the rigidity is comparatively small decrease and bending moment of arch culvert and deformation of surrounding soil become small.