Work is under way to stabilise both faces of a 15m high, 450m long rail cutting on the outskirts of Bristol. The cutting carries the main line between London, South Wales and the South West, and limited clearances require most of the work to be carried out during rail possessions.
CAN Geotechnical is using a wide range of its specialist drilling rigs to install more than 1,200 rock bolts up to 7m in length into Carboniferous sandstone. Drill masts, mounted on telehandlers and excavators, are forming holes in the lower level bolt locations, while the upper portion of the cutting is being accessed with A-frame drill rigs suspended over protective rockfall netting.
The bolts will be used to pre-tension netting over the entire rock face.
CAN has kept six drill rigs running continuously throughout the weekend possessions. It is also carrying out devegetation.
CAN is working for main contractor Alfred McAlpine, and is due to complete the work in late autumn.
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