Ground preparation for Smartraft® is simple, the ground needs just to be left or excavated to 200mm below ground level with a firm, but not solid base.
The shallow depth required significantly reduces the risk of damage to underground services such as fibre optics, gas, water etc. This also then facilitates much faster preparation times compared to traditional size raft foundations.
The side cast excavated material (as shown in the image) or imported finished level material can be backfilled in to the perforations in the Smartraft® which in turn can lead to reduced vehicle movements and removal of material from the installation area.
With Smartraft® the required position of the posts for the VRS is all designed off site and the sockets cast at the required locations in the Smartraft®. This reduces the need for the installer to know the required post spacings and eliminates the risk of posts being set in the wrong positions. This is particularly relevant in modern times, with a large array of system types and post spacing required for main line works, transitions, terminals etc and creates a right first time every time environment.
The shallow foundation depth reduces the risk of conflict with other apparatus in the installation area, removing the risk of varying post positions from the specified criteria and therefore eliminating the risk of departures from standard and the associated liabilities incurred with them.
In this image, Smartraft® is being installed on a shallow bed of type 1 material, which makes an ideal preparation on to which to lay the Smartraft®. Where very hard or rocky ground is encountered, to ensure there is not large voids below the Smartraft® contact area or to ensure there is no cantilever effect on any single Smartraft® length then sharp sand or other compactable material can be used to prepare the installation area.
This image is of the same location as featured in the images above, was taken approx. 12 months after installation.
The material excavated at this location for the installation of the Smartraft® was used for the backfill of the perforation. The ground has settled well in and around the Smartraft® leaving just a small section exposed. Smartraft®, when installed and backfilled in this way, causes no issues for grass cutting equipment, and can even give an even clean edge to machinery to work up to or over.
Smartraft ®
A320 Surrey Project
Client | Surrey City Council |
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Project Cost | £900,000.00 |
Services | Supply & Installation of Smartraft® and VRS |
Location | A320, Surrey |
Army & Navy Junction Smartraft® Case Study
Client | Henderson & Taylor, Essex Highways |
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Services | Smartraft®, VRS |
Start Date | 29th March 2021 |
End Date | 25th May 2021 |
Location | Army & Navy Junction, Chelmsford Essex |
A14 Jct 36 Entry Slip Road Smartraft® Repair
Client | Ringway |
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Services | Smartraft®, VRS |
Start Date | 5th July 2021 |
End Date | 5th July 2021 |
Location | A14 Jct 36 Slip Road |
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