Case Study: Steel Sheet Pile Slope Stabilisation

Steel Sheet Pile Slope Stabilisation

Contract No:C881
Client:Balfour Beatty Regional Civil Engineering
Location:A1 Morpeth, North East of River Wansbeck
Value:Approximately £430,000
Summary:Supply and installation of steel sheet piles to provide permanent slope stabilisation to an existing cutting section of the Southbound A1 Carriageway. The slope stabilisation consisted 2 separate sections with the following quantities of sheet piles installed:

Sheet Piling UK Ltd were employed by Balfour Beatty Regional Civil Engineering to complete the installation of permanent steel sheet piles to two sections of existing cutting slope on the Southbound carriageway of the A1 near Morpeth. The sheet piles, ranging in length from 5.5m to 9.5m long were installed by ‘freehand’ conventional methods in individual locations.

The steel sheet piles were installed using a 100Te Capacity crawler crane positioned on the Southbound carriageway which was closed to traffic for the duration of the works. Initially installation was carried out using a crane suspended ICE1423 vibratory piling hammer to refusal and this was then followed by impact driving using a crane suspended HPH2400 hydraulic impact hammer and a 100Te capacity mobile crane.

The 482 no. sheet piles were installed during April 2012 during a period of carriageway closure working a continuous 7 day week. At peak 2nr gangs were employed for the sheet pile installation in addition to further resources cutting/trimming piles to final level.

On completion of the sheet pile installation works Balfour Beatty completed the reinstatement of the existing soil batter profile to original levels.