Serviceability Assessments

Underground structures have been constructed since the Stone Age.  Mines and tunnels in the UK, dating from the Industrial Revolution, are still in use today, often as visitor attractions or as part of the railway and canal network.  In London, the Thames Tunnel was built by Sir Marc Brunel between 1825 and 1843 and parts of the Metropolitan line date back to 1863.

Owners of underground structures still in use must secure the long-term service capability of their asset systems through sound asset management and maintenance practices.

Underground Serviceability Assessments

A key element of serviceability assessments is to understand the serviceability failure performance of the structure concerned, i.e., when the actual displacement of the structure exceeds the maximum allowable displacement.   Underground structures involved may comprise:

  • Tunnels and tunnel linings
  • Portals and shafts
  • Metro stations
  • Retaining walls
  • Piles

Although design information can usually be readily obtained for more modern structures, with historic structures such information is not generally available. London Bridge Associates (LBA) have the experience to provide clients with simple and practical assessments of both modern and historic structures.

Long-term service

LBA can undertake serviceability assessments so that prudent judgments about the long-term ability of the assets to deliver the required level of service now and in the future can be made. We also aim to provide our client’s with recommendations with regard to any repairs, strengthening or modification of their infrastructure that may be required to maintain or extend the life of the asset.