Reduction of lateral loads in abutments using ground anchors

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Title: Reduction of lateral loads in abutments using ground anchors
Authors: Laefer, Debra F.
Truong-Hong, Linh
Le, Khanh Ba
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Date: 1-Nov-2013
Abstract: In bridge design, economically addressing large, lateral earth pressures on bridge abutments is a major challenge. Traditional approaches employ enlargement of the abutment components to resist these pressures. This approach results in higher construction costs. As an alternative, a formal approach using ground anchors to resist lateral soil pressure on bridge abutments is proposed herein. The ground anchors are designed to minimise lateral forces at the pile cap base. Design examples for high stem abutments (heights 6–8 m) are conducted for a simple 33 m long concrete bridge span, with two to three traffic lanes. The abutments are supported by driven, reinforced concrete piles. As lateral forces at the pile cap are significantly reduced, only one row of piles is needed. When compared with common abutment design, the proposed approach halved the number of piles required and decreased the required abutment volume by 37%.
Type of material: Journal Article
Publisher: Thomas Telford Ltd.
Copyright (published version): 2013 Thomas Telford Ltd.
Keywords: bridgesanchors & anchorages
DOI: 10.1680/grim.12.00002
Language: en
Status of Item: Peer reviewed
Appears in Collections:Earth Institute Research Collection
Civil Engineering Research Collection

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