NEW FOUNDATION FOR PAISLEY RAIL BRIDGE REPLACEMENT
When a rail bridge requires replacement, construction time is of vital importance. When the ground foundation material is found to be weak a lightweight solution is required. The low weight, high stability and speedy installation attributes of Leca® LWA solved both problems in the replacement of an old, wrought iron bridge structure in Scotland for Network Rail.
The Stirrat Street Bridge at Paisley was removed and a new, low maintenance permanent-way structure was built to carry the track. As road traffic no longer passed below the bridge, it was determined that the void should be filled to enhance the embankment stability. However, the ground condition survey flagged up that the foundation material in the area was not up to modern load bearing standards and that using traditional heavy fill would overload the existing ground base. Leca® LWA was selected to provide the void fill without overloading the support substrate.
Amount of material: 1200m3 of LECA® LWA (10-20mm)
Interesting Fact: The Stirrat Street Bridge at Paisley was removed and a new, low maintenance permanent-way structure was built to carry the track.
Delivery Method: 2.2m3 Build Bags
Client: Network Rail