The existing stop butts at Whittington Ranges had not been used for many years and had fallen into a state of disrepair. Our client was tasked with reinstating the stop butts and bringing them up to current safety standards so that the range could be re-opened for use by the armed forces.
Two stop butts underwent reconstruction to increase their heights by approximately 4.0m to 12.5m, and also increase the angle of the front face from 15 degrees to 34 degrees.
The most cost effective and chosen method to achieve this was to form a geogrid soil reinforced slope.
Wrekin’s E’GRID 50R was used for the slope reinforcement with 6.4m long tails installed horizontally at 1.0m vertical centres as the primary reinforcement.
2.0m long tails were used as the secondary reinforced midway between each of the primary layers. The geogrid layers were carefully set out to achieve the required face angle, with site-won fill placed and compacted between each of the layers to form a stable reinforced soil construction.