Case Studies

Botley landslip repair scheme

Customer – Geoffrey Osborne Ltd.

When – February 2014

Type – Sheet piling, Earthworks

Overview:

After torrential prolonged periods of rain, an embankment gave way between Eastleigh and Fareham, making it impassable for trains.

Suttle Projects was tasked with the following at Botley:

  • Installation of 1 mile of access road.
  • Excavation and muck away of 35,000t saturated material provided by our colleagues at Suttle Stone Quarries.
  • Installation of over 600 sheet piles in various lengths with excavator with attached Movax unit – the piles have been driven down to prevent any further movement of the earth.
  • Backfill exceeding 40,000t of crushed aggregate levelled in 150mm layers by the 34t machine onsite and compacted by a road roller.
  • Installation of over 1,000m of drainage to enhance the railway.

The existing embankment material was not of sufficient quality to be used or remain on use. The collaboration between designer, contractor and Suttles brought the opportunity to install much-needed drainage along the toe of the embankment.

As nominated specialist sub-contractor to Osborne, we provided specific work package plans and associated task briefings to detail individual tasks and associated risks. We provided lift plans for lifting operations. We were involved with the close call and improvement opportunity reporting system.

The railway was opened a week later than anticipated. The ever-changing work scope required a strong interface between designer, main contractor and Suttles – especially with regard to the extent of sheet pile lines and drainage layout. This was achieved by having a constant management presence on site from all parties.