Civil Engineering and Construction - Introduction

A1 (m) Bramham To Wetherby Upgrade Scheme, Paradise Farm

Client: Highways Agency
Consultant: Atkins
Main Contractor & Anchor Installer: Balfour Beatty Civil Engineering Ltd

Project Specification:

To facilitate the widening of the motorway and positioning of an additional carriageway under this
bridge it was necessary to remove the existing embankment forming the bridge abutment. The
exposed cut face needed to be made safe in the short term to allow for the construction of a new
reinforced concrete retaining wall.

Solution:

Excavation of the embankment was completed in 600mm stages from the top down with care not to
affect the structure of the bridge or expose its foundation piles. After each cut, anchors were installed
and a measured section of trench sheeting was secured into position by loadlocking the anchors. This
process was then repeated a further 10 times. A total of 25 B06TC anchors were installed into the top
six rows of sheeting and 32 B08TC anchors into the lower 4 rows. The ability to demonstrate
immediate anchor loads allowed for continuous excavation therefore reducing the overall
installation in time and cost.

Anchor System: B06TC & B08TC galvanised spheroidal graphite iron anchor each c/w 7m of 12mm & 16mm Ø galvanised steel wire tendon, 200mm x 200mm galvanised steel load plate, 12mm & 16mm galvanised steel wedge grip.

Quantity: 57

Anchor Design Life: 40yrs

Soil Type: Made Ground

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