A EXAMINATION ON SUBGRADE ELASTIC MODULUS FOR PAVEMENT STRUCTURE USING LIGHTWEIGHT GEOMATELIAL MIXED WITH EPS BEADS

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  • 発泡ビーズ混入軽量化土を用いた 舗装構造のための路床弾性係数に関する検討
  • ハッポウ ビーズ コンニュウ ケイリョウカド オ モチイタ ホソウ コウゾウ ノ タメ ノ ロショウ ダンセイ ケイスウ ニ カンスル ケントウ

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Abstract

The lightweight geomaterial mixed with EPS beads (LWGME), a mixture of superlight EPS beads and normal geomaterial, is one of the geoform. As for LWGME, the applicability as subgrade soil is checked. However, the design parameter as the subgrade soil of LWGME is not clear. This study, as a part of our studies to make clear the design parameter of LWGME used for subgrade, conducted the resilient modulus test. Moreover, resilient modulus from resilient modulus test is a non-linear elastic modulus depending on a stress state. Therefore, subgrade resilient modulus was computed by structural analysis of the pavement using GAMES, and the estimate equation in consideration of combination conditions is proposed so that subgrade resilient modulus could be computed easily.

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