M1-A1 Link Road
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Thorpe Lower Lane Bridges
Contents
1 Introduction
2 Background
3 Construction, Structures
4 Dolphin Lane Footbridge
5 Lofthouse Interchange
6 Lofthouse Interchange
7 Thorpe Lower Lane Bridges
8 Sharpe Lane, Aire Valley
9 Newsam Green, Drainage
The existing bridge carrying the M1 over Thorpe Lower Lane was found to be understrength and required widening to accommodate the additional lanes from the northbound slip roads of the free flow link at the Lofthouse interchange. Since the abutments were found to be satisfactory, only the existing deck and top of abutments were demolished during closures of the motorway in April and August of 1998.
The top of the abutments required removal to accommodate the new bearing shelf, and this was carried out by drilling approximately 200 cores per abutment to facilitate demolition. The new bearing shelf features an inspection gallery to allow easy inspection of the structure. The new deck was constructed from prestressed concrete Y beams with an in-situ concrete slab supported on elastomeric bearings.
A new bridge was required at Thorpe Lower Lane to accommodate the extended southbound slip roads to Lofthouse Interchange. The bridge is of integral construction requiring no joints or bearings and the deck is formed of prestressed concrete Y beams with an in-situ concrete slab.
The new bridge constructed to the east of the existing bridge. The retaining walls to the south were constructed in reinforced earth and the hexagonal facing panels used in construction can be seen before the brick cladding was constructed. Photograph taken 15 August 1998.
Prestressed concrete Y beams used in the deck of Thorpe Lower Lane West Bridge prior to erection.
The south bearing shelf of the west bridge under construction. Photograph taken September 1998.
The elastomeric bearings shortly before the beams were placed. Photograph taken September 1998.
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