The existing superstructure at Finnieston Bridge was removed and replaced with an embankment. The embankment was designed in accordance with EC7.
Design Works included;
• Slope stability (modelled using GeoStudio)
• Settlement of ground below proposed embankment
• Structural and hydraulic design of a proposed drainage pipe under embankment
MHB also carried out temporary works designs on the site including temporary support for services/cables, support for electrification masts and abutment walls.
The proposed works comprised the installation of disabled access ramp to both Platforms 1 and 2 at Milliken Park Station. The layout of the ramp and stair structures was agreed with Scotrail and Network Rail at Form F001 stage.
The design was in accordance with DDA, BS 8300, Eurocodes and all appropriate Network Rail Standards.
The existing Platform 1 access stairs and ramps were to be replaced with a Network Rail standard steel ramp which transitioned into a masonry and concrete ramp at platform level. A Network Rail standard steel stair was installed adjacent to the ramp.
The existing access at Platform 2 consists of a tarmac ramp with a non-compliant 1 in 12 gradient from Corseford Avenue, with recently installed steel handrails. The existing Platform 2 access ramp was replaced with a new ramp consisting of a reinforced concrete slab founded on imported granular fill and masonry walls. A concrete stair with masonry walls was installed adjacent to the ramp.
Steel handrails were installed on both sides of the ramps.
The ramps were installed at a gradient of 1 in 16 to meet DDA requirements.
David Carmichael joined MHB Consultants as a CAD Technician on 20 January 2014. He was previously employed by Parsons Brinkerhoff in Edinburgh on the Edinburgh Trams Project.
The proposed works comprised the installation of Ram-Arch steel mesh as temporary support to the tunnel lining between 61 and 62 chains in order to stabilise heavily spalled and loose brick at the crown and haunches. The mesh comprised welded Grade B500B reinforcing bars, and was fixed to the existing lining using Hilti resin anchors.
A permanent solution, which also remdiates ingress of water through the lining, is planned for the future.
The Ram-Arch mesh was analysed linearly as a steel arch using Strand7 finite element analysis software. An elastic-perfectly plastic model was used to describe material behaviour. The arch was assumed to be pinned at its base, with spring supports applied round the perimeter to model restraint provided by the tunnel lining.
Loading on the mesh was generated by the tunnel lining. It is conservatively assumed that the Ram-Arch was required to support the entire lining from springing level on either side of the tunnel.
The proposed Ram-Arch mesh, when supplied galvanised, has a design life of 120 years. The proposed temporary works scheme has a design life of 10 years as it is anticipated that a permanent solution will be installed within this timescale.
We recently gained accreditation of our Environmental and Health & Safety Management Systems to the ISO 14001 and OHSAS 18001 Standards respectively. This is in addition to our Quality Management System which complies with ISO 9001.
Damien Moore completed an Industrial Roped Access (IRATA Level 1) course in December 2013. This enables us to carry out inspection and supervision works on difficult access sites, such as beneath bridge decks and on steep slopes where conventional methods are not possible.