56 | the rail engineer | november 2011
Modular
concrete
walls
enlarging a station in a limited W hen area, the resulting excavation often
Glasshoughton Station.
results in a retaining wall being speciďŹ ed. These walls can sometimes be quite high, and as they are in public areas have to be decorative as well. Cast in-situ walls are sometimes not the best solution, a modular system such as Keystone may be better. Keystone retaining wall units are manufactured from high strength, durable concrete which are laid dry and can be used in conjunction with a geogrid to provide tall walls or to accommodate high surcharges. Keystone’s ability to connect positively with
Abutment on Channel Tunnel Rail Link.
proprietary geogrid systems has enabled it to be built to heights of over 15 metres worldwide - making it ideal for rail and bridge applications and its simple, dry build construction enables it to handle the most challenging site design.
Fixing pins It can also be used with or without a concrete backing to create a gravity wall. It uses a unique high strength ďŹ xing system which securely locks the component parts in place. At the centre of the system are pultruded G.R.P. pins which offer a high sheer strength that will last the lifetime of the wall. A combination of Keystone modular units, positive pin and comb connections and soil reinforcing geogrids delivers ‘rock solid’ stability and performance. Its enhanced connection between grid and block is critical to ensure economic designs and is available on a design and supply basis.
New solutions There are two recent additions to the Keystone family of retaining wall products. Slope-Loc is intended for similar applications
SLOPELOC
to Keystone but it offers a sloped face ďŹ nish which in certain situations is more preferable to the traditional vertical face. Stepoc is designed as a direct replacement for shuttered concrete and is ideal for use in a wide variety of retaining wall applications, including retaining walls, sheer walls, laterally-loaded panels and blast walls. So next time you need a “simpleâ€? wall, there may be more choice than you think.
KEYSTONE
FIRST CLASS - MODULAR RETAINING SYSTEMS SLOPELOC™
KEYSTONE™
A STRAIGHT-FORWARD DRY LAY BLOCK THAT PROVIDES A DURABLE HARD FACING TO REINFORCED SOIL SLOPES
THE No.1 MODULAR REINFORCED EARTH RETAINING WALL SYSTEM ON THE MARKET TODAY.
Offers a characteristic sloped face finish which in certain situations is more preferable to the traditional vertical face. (designed to BS 8006 and HA 68/94). s !VAILABLE IN A RANGE OF COLOURS
MODULAR SYSTEMS REDEFINED For further information on Stepoc, Keystone and other associated products contact the Anderton Concrete, sales information centre on 01606 535300 or email civils@andertonconcrete.co.uk
www.andertonconcrete.co.uk
Truly Functional and elegant. Replacing gabion, crib and cast-in-situ walls. Radiused or straight build, ideal for rail, roadside and bridge locations. (Meets HA requirements for durability.) s !VAILABLE IN A RANGE OF COLOURS
SALES ENQUIRIES Anderton Concrete Products, Units 1 & 2, Cosgrove Business Park Soot Hill, Anderton Northwich, Cheshire CW9 6AA. T: 01606 535300 F: 01606 75905