Use of Lightweight Fill Materials for MSE Wall

Daniel Huang, David Fuerth, Abe Choi

In the proceedings of: GeoSt. John's 2019: 72nd Canadian Geotechnical Conference

Session: Geosynthetics

ABSTRACT: Applying lightweight fill (LWF) as the backfill for the reinforced zone of a MSE wall can effectively reduce the vertical stress imposed on the base of the wall in order to manage weak foundation soils or sensitive structures underneath the MSE wall. LWF however also reduces the available resistance to lateral earth pressure and other loads as well hence impacting the MSE wall design. This paper briefly introduces common LWF materials, analyzes in detail how LWF impacts design (failure) modes and discusses conditions, limitations and requirements of using LWF in MSE walls. Two case histories of using LWF are also presented in this paper.

RÉSUMÉ: mécaniquement (MSSM) peut réduire efficacement la contrainte verticale exercée sur la base du mur, de manière à légers réduisent aussi la résistance à la pression latérale du sol et aux autres charges, ce qui influence la conception du mur. Le présent article décrit brièvement les matériaux de remblayage légers courants, analyse en détail leurs effets sur les modes de défaillance et expose les conditions, les limites et les exigences de leur utilisation dans les MSSM. Il

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