Stacy M.,Parsons Brinckerhoff |
Burr M.,Jacobs Engineering |
Jones P.,Laing ORourke |
Kenworthy N.,Laing ORourke |
And 3 more authors.
Proceedings of the Institution of Civil Engineers: Bridge Engineering | Year: 2014
The Metrolink phase 3 project in Manchester, UK, has created around 60 km of new tram lines and has incorporated over 380 structures including 160 bridges and tunnels. Nearly 80 bridges were refurbished, repaired or strengthened to provide a low-maintenance system with a minimum 50-year structural design life. The new tram lines have been built on new dedicated alignments and on former railway corridors, reusing existing structures with an age of up to 140 years. Various contractual and technical approaches were taken to address the risk due to structure condition, including risk-sharing arrangements and phased scope determination. Particular issues encountered by the project include: limited information on structure condition; corrosion of metallic structures; scope risk; strategy for repair versus replacement; vehicle incursion risk; determining appropriate specifications; retention of cast-iron structures and modifications to parapets due to electrification. The conclusions include lessons learned for projects dealing with the renewal and upgrade of legacy structures in an affordable manner.
Jones R.,University of Cardiff |
Brown D.S.,University of Cardiff |
Harris E.,Natural History Museum in London |
Jones J.,Capita Symonds |
And 3 more authors.
Journal of Helminthology | Year: 2012
Relatively few studies have examined the parasite fauna of British reptiles, partly due to the cryptic nature and low population density of these hosts. Here we examined 12 populations of the slow worm Anguis fragilis which, unlike other UK lizards, occurs at locally high population densities. Morphological examination of non-invasively collected faecal samples revealed the presence of Neoxysomatium brevicaudatum and a second unidentified nematode species. Although previously unrecorded from slow worms in the UK, N. brevicaudatum was present in 38% of animals (mean intensity 70.9, range 1-686). Morphological identification was confirmed by sequencing the 18S ribosomal gene. The use of the species-specific, cytochrome oxidase I mitochondrial gene primers proved an efficient alternative to conventional, microscope screening for parasites, although the original identification of N. brevicaudatum was dependent upon morphological characters. Sequencing also identified the second, smaller nematode as belonging to the Rhabdiasidae family: this species was even more common at a prevalence of 83% (mean intensity 102.8, range 1-2000). While increasing our knowledge of the UK macroparasite fauna, this work demonstrates the benefits of a combined morphological-molecular approach. © 2011 Cambridge University Press.
Tomkins J.,Capita Symonds
Proceedings of the Institution of Civil Engineers: Civil Engineering | Year: 2011
The 500 m long cut-and-cover Bell common tunnel was opened in 1984 as part of the M25 London orbital motorway. This paper describes a recent £90 million refurbishment to bring the tunnel up to european directive standards, including the replacement of all mechanical, electrical, operational and communication systems and the installation of passive fire protection. The project drew on lessons from a similar refurbishment of the nearby M25 Holmesdale tunnel, which was completed by the same team in 2007. Using the same principles of lean construction, the Bell common project finished ahead of programme, below target cost and with minimal disruption to the 85 million vehicles which passed through the tunnel during the works.
Witterick S.,Capita Symonds.
Health estate | Year: 2011
Susan Witterick, director of Acoustics and Air Quality at Capita Symonds, examines the important role of acoustics in healthcare facility design in the "Age of Austerity", warning that, despite being a key factor in creating an optimal hospital environment for patients, staff, and visitors, it is too often still viewed as "a poor cousin at the design team table".
PubMed | Capita Symonds.
Type: Journal Article | Journal: Health estate | Year: 2011
Susan Witterick, director of Acoustics and Air Quality at Capita Symonds, examines the important role of acoustics in healthcare facility design in the Age of Austerity, warning that, despite being a key factor in creating an optimal hospital environment for patients, staff, and visitors, it is too often still viewed as a poor cousin at the design team table.