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

多拱涵路堤是在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。设计成功的关键是在考虑地震影响的情况下，估算出拱涵的实际安装间距，并明确填充材料与预制结构之间的相互作用。本文通过动力离心模型试验和动力有限元分析，探讨了多拱涵间距对地震作用下结构力学性能的影响。结果发现，单位间距较窄的情况下，由于刚度较小的填土部分体积减小，拱涵弯矩和周围土体变形变小，整体刚度较高。

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.