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Webinar

3D ground penetrating radar assessment of the Tay Road Bridge

Event organised by ICE

Date
07 October 2021
Time
14:00 - 15:00 BST (GMT+1)
Location
Online
Online,
United Kingdom

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Overview

The focus of the event will be on the findings of a 3D Ground Penetrating Radar(GPR)  survey and its use to detect the thickness of the asphalt, the positions of the rebars within the concrete deck and to identify any anomalies within the bridge deck. 
 

Summary

The Tay Road Bridge is 2250m in length and spans the river Tay between Dundee and Newport-on-Tay. The bridge was designed by William A Fairhurst and took three years to build between 1963 and 1966 at a cost of £4.8m. In 2020, WSP were commissioned by Tay Road Bridge Joint Board to undertake a pavement surfacing investigation to develop a maintenance strategy. The pavement surfacing on the bridge is a fully flexible construction and is approximately 55 years old and has not required any major maintenance since its construction.  Surveys were carried out in lanes 1 and 2 along the northbound and southbound carriageways. The pavement investigation included a Digital video survey, 3D Ground Penetrating Radar (GPR) survey, profilometer survey, road cores of the surfacing and laboratory analysis of the material.

 The GPR survey used a step-frequency ultra-wideband ground coupled and an air-coupled antennae manufactured by 3D-Radar. All data was positioned using Real Time Kinetic (RTK) GPS and was transformed into an Ordinance Survey Grid to enable an accurate 3D model of the bridge to be created of the GPR data. This presentation highlights some of the remarkable findings from the analysis of this 3D GPR model of the bridge deck.

You can join this webinar up to 10 minutes before the start time of 13:00 using the link below:
https://ice-org.webex.com/ice-org/onstage/g.php?MTID=e7cc2335beca055368ea8d75e6c1790d2

If prompted for a password, please enter scotevent



 

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