Shaft Sinking at Parsons Street Underbridge, Bristol. M215

Client
Network Rail

Project
Construction of a new dual carriageway.

Description

shaft sinking

The proposed route of a new dual carriageway was fouled by existing live Network Rail lines. To allow the road to be constructed a new under bridge is required which will carry the railway above the new road. The bridge is to be supported on foul large piles that will transmit the loads to a suitable rock strata. The piles are located in very close proximity to the live lines and this required steel piles to be installed to support the track.

Using our horizontal directional drilling equipment we installed eight large high tensile steel rods horizontally below the live railway track, these rods were then utilized as tie rods to link the opposite pre piled walls thus preventing any deflection or rail movement. Following the pre-tensioning of the tie rods a reduced level dig was undertaken to reach the top of pile level. The piles were formed by constructing four DN3000 x 20m deep segmentally lined jacked caisson shafts, prefabricated steel reinforcement cages were lowered into the shafts, the shafts were completely filled with ready mixed concrete to form the piles on which the bridge superstructure will be built.

Ground Conditions were Firm CLAY overlying weak MUDSTONE overlying strong SANDSTONE.

Study Project Date  
Shaft Sinking at Bryn Cowlyd Water Treatment Works, Dolgarrog, Wales. M236 06/02/2017
Shaft Sinking at Llanberis Waste Water Treatment Works. M237 03/10/2016
Shaft Sinking at Wythenshawe. M226 06/07/2015
Shaft Sinking at Parsons Street Underbridge, Bristol. M215 06/07/2015
Shaft Sinking at Collingwood Road/Melville Road Shaft, Bristol, Avon. M206 07/04/2014
Shaft Sinking at Pool Close, Puriton, Somerset. M205 13/01/2014
Shaft Sinking at Ipswich Chord Sewer Diversion, Ipswich. M194 03/06/2013
Shaft Sinking at Wellwood Street FAS, Amble, Northumberland. M188 05/11/2012
Shaft Sinking at Shepton Mallet STW Upgrade, Shepton Mallet. M183 27/07/2012
Shaft Sinking to Heald Green Station UTX, Cheadle, Manchester. M180 29/02/2012
Shaft Sinking at Howdon STW, Newcastle Upon Tyne. M179 30/11/2011
Microtunnelling at Denshaw Road, DG5, Delph, Lancashire. M173 31/10/2011
Shaft Sinking at Colby FTS, Appleby-in-Westmorland, Cumbria M169 30/04/2011
Microtunnelling at Hunter Street CSO, Glasgow. M163 30/09/2010
Shaft Sinking at Mill Brow Flood Alleviation Scheme, St Helens. M156 31/05/2010

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