The site is a road in the historic fishing village of Lower Upnor, situated on the River Medway. The road served a new Taylor Wimpey’s development at Mariners Way. A man-made slope adjacent to the road showed significant signs of instability, caused primarily by filling at the top of the steep slope.
Some earlier remedial action, involving ballast bund bags at the base of the slope, had failed following significant rainfall caused shear tears and deep fissuring within the slope. Further rainfall continued to lubricate the shear failure through the fissuring, causing the slope to became so unstable that it caused the displacement of the bags onto the pavement and trees which were being monitored on the slope slid down the slope some 100 metres.
GSS Piling was commissioned to design a solution that would stabilise the slope. Our solution involved the design and construction an engineered berm at the base of the slope to prevent further base heave, as well as the installation of a buttressed contiguous bored pile wall.