M8 Kingston Civil Engineering

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Overview

Location: Glasgow, Scotland

Client: Glasgow City Council

Scope: Tensile Bar Stressing and Goruting

Stobcross on-ramp joins the west bound M8 motorway with the Kingston Bridge, one of Europe's busiest river crossings with 180,000 vehicles crossing per day. The £11M refurbishment of the on-ramp is part of the on-going repair and strengthening works of the Kingston Bridge and its associated structures.

Hevilifts were employed to undertake the installation, stressing and grouting of 64 No. 50mm diameter high tensile steel bars thought preformed holes. These bars were installed to clamp the concrete deviator and anchor blocks to the existing bridge deck. The deviator and anchor blocks were needed for the post-tensioning system to be installed at a later date as part of the over-all strengthening scheme.

Specialist hydraulic equipment was used to permanently stress each bar in incremental stages to loads of up to 1400kN. Upon completion of the stressing sequence, the bars were then grouted in-situ with a blended comentitious grout to provide protection to the bar from the ingress of corrosive contamination.