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Pages 4-6

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From page 4...
... 4 Introduction 1.1 Background The purpose of a bridge approach system is to provide a smooth transition between a highway pavement and a bridge. However, as a result of several factors, differential settlement or bumps are often present at the end of bridges (Briaud et al.
From page 5...
... Introduction 5   Quality control (QC) measures incorporated during construction often include QC testing of the compaction of the backfill and smoothness assessment of the riding surface of the approach.
From page 6...
... 6 Practices for Bridge Approach Systems • Geotechnical considerations for settlement and compaction of backfill material; • Water management practices and mitigation strategies to address drainage issues; • Prioritization of major performance issues; and • Practices deemed effective by DOTs. 1.3 Synthesis Scope and Approach This synthesis includes a literature review, a survey of DOT practices, and case examples to detail and highlight the practices used by five state DOTs.

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