TRL aids Highways Agency with M2 motorway hole investigation

The UK’s transport research Laboratory (TRL) provided a rapid response when asked for help as part of the investigation of the recent appearance of a hole in the central reservation of the M2 between junctions 5 near Sittingbourne and 6, near Faversham. The hole that appeared is believed to be a dene hole; an historic man made hole which may have been used to mine for chalk hundreds of years ago. The hole was filled in when the M2 was constructed, but recent wet weather contributed to the destabilisati
February 21, 2014 Read time: 2 mins
The UK’s transport research Laboratory (491 TRL) provided a rapid response when asked for help as part of the investigation of the recent appearance of a hole in the central reservation of the M2 between junctions 5 near Sittingbourne and 6, near Faversham.  

The hole that appeared is believed to be a dene hole; an historic man made hole which may have been used to mine for chalk hundreds of years ago. The hole was filled in when the M2 was constructed, but recent wet weather contributed to the destabilisation of the ground, causing the hole to appear.

Within a few hours of being asked for assistance, TRL was able to mobilise a team to be on site to provide two coring rigs and staff to undertake investigations of the carriageway in one lane either side of the hole to establish its integrity. The carriageway is constructed of jointed reinforced concrete with a thick asphalt overlay.

Two TRL teams working round the clock cored approximately 38 holes to help determine the extent of the problem.

The 503 Highways Agency has now stabilised the hole with forty tonnes of pea shingle and further geotechnical investigations by TRL confirm that the ground beneath the M2 is safe for traffic to use.

Further resurfacing work has finished, with all lanes now re-opened, nine days after the 15ft deep hole swallowed up the road surface.

For more information on companies in this article

Related Content

  • Putting the brakes on smart motorways
    February 28, 2022
    The UK government has announced that development of its all-lane running highways is going to be put on hold for another few years to assess safety data. Adam Hill finds out why
    Read More
  • Managed motorways, hard shoulder running aids safety, saves time
    January 30, 2012
    The announcement that, in 2012/13, work to extend Managed Motorways to Junctions 5-8 of the M6 near Birmingham in the West Midlands is scheduled to start marks the next step for the UK's hard shoulder running concept, first introduced on the M42 in 2006. The M6 scheme is in fact one of several announced; over the next few years work will start on applying Managed Motorways to various sections of the M1, M25 London Orbital, M60 and M62. According to Paul Unwin, senior project manager with the Highways Agency
    Read More
  • M25 upgraded to ‘smart’ motorway
    November 10, 2014
    Road users on the vast majority of the UK’s M25 will benefit from four-lane capacity now that the final section between junctions 25 and 27 has become a smart motorway. The road has been upgraded from three to four lanes in each direction, with the hard shoulder converted for use as a permanent traffic lane and enhanced on-road technology to manage traffic flow to improve the reliability of journey times, providing a boost for businesses and the wider economy.
    Read More
  • South west’s first smart motorway opens
    January 15, 2014
    The first smart motorway scheme in the UK’s south west has been officially launched, covering seven miles of motorway around the Almondsbury interchange and including junctions 19-20 on the M4 and junctions 15-17 on the M5. It is designed to help reduce congestion and improve safety and journey times by introducing variable speed limits and opening the hard shoulder during busy traffic periods. The improvements to the M4 and M5 use a range of technologies and operational systems to reduce congestion and
    Read More

Highlighted Content