UNEVENNESS ALLEVIATION STRUCTURE AND UNEVENNESS ALLEVIATION METHOD FOR PAVED ROAD: Fid-Bau Portal

UNEVENNESS ALLEVIATION STRUCTURE AND UNEVENNESS ALLEVIATION METHOD FOR PAVED ROAD

KAWANISHI ATSUSHI / SAKAFUJI YUTA

To provide an unevenness alleviation structure and unevenness alleviation method for paved road that effectively alleviates unevenness and does not significantly hinder the passage of vehicles even when there are large steps on a road due to a large-scale earthquake and the like.SOLUTION: An unevenness alleviation structure is constructed by estimating an unevenness alleviation shape through the application of a nonlinear FEM analysis in consideration of a rigidity reduction rate based on an initial rigidity and a rigidity after reduction in order to alleviate an unevenness when an uneven subsidence causes unevenness near a boundary between a roadbed 120 or a base course 110 of a paved road and a structure 130. The unevenness alleviation structure includes a reinforcement mat 10 that is laminated and embedded in the vertical direction in advance in the roadbed 120 or the base course 110 directly above the boundary. The reinforcement mat 10 is formed by surrounding a filler 20 with a reinforcement material 30 with at least one laminated layer provided on one side in the length direction. A rigid member 40 having a rigidity higher than that of the filler 20 is arranged on the unevenness side predicted to occur near the boundary.SELECTED DRAWING: Figure 1

【課題】大規模な地震等により道路に大きな段差が生じた場合であっても、段差を効果的に緩和して、車両の通行に大きな支障を来さない舗装道路の段差緩和構造と舗装道路の段差緩和工法を提供する。【解決手段】不同沈下によって舗装道路の路床１２０または路盤１１０と構造物１３０との境界部付近に段差が生じた場合に、段差を緩和するために、初期剛性及び低下後剛性に基づく剛性低下率を考慮した非線形ＦＥＭ解析を適用して段差緩和形状を推定することにより段差緩和構造を構築する。段差緩和構造は、予め境界部付近直上の路床１２０または路盤１１０内に、上下方向に積層して埋め込まれた補強マット１０を備えている。補強マット１０は、充填材２０を補強材３０で囲み込んで形成され、積層された少なくとも１層は、長さ方向の一側であって境界部付近で生じると予測した段差側に、充填材２０よりも剛性が高い剛性部材４０が配設されている。【選択図】図１

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