Our Projects

Guided Auger Boring – Installing 60m of DN300 – Leeds

Project Overview
YW investigated a flooding event adjacent to a foul sewer. Further CCTV and investigation work
found that a DN300 VC foul water sewer pipeline was 100% full of concrete. The foul sewer was
then placed on mitigation until a solution was found.
A solution was presented to YW by an alternative contractor which required the replacement of
60m of DN300 VC at a depth of 3.5 metres by open cut installation. The proposed solution would
have required a full road closure in the city centre for a duration of 16 weeks. Leeds City Council
Highways department rejected the proposal.
Description of Works
Trenchless Solutions were appointed to undertake a trenchless installation, construct the shafts,
and provide attendances. The new section of pipeline was constructed using DN300 Naylor Denlok
NC vitrified clay jacking pipe, following installation the new pipeline was connected into the existing
foul sewer in the drive and reception shafts by a selection of bends and stub pipes.

 

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Proposed 16 Week Open Cut Construction	As Built 5 Week Trenchless Construction
Restricted Access: • Leeds General Infirmary • Local Business & Residents • Proposed Full Road Closure for 16 Weeks • Increased Construction Traffic • Road Diversions	Restricted Access: • Leeds General Infirmary • Local Business & Residents • Reduced Construction Traffic • No Road Diversions
Health & Safety: • Risk from Existing Utilities • Temporary Deep Trenches • Increased Temporary Works	Health & Safety: • Reduced Risk from Existing Utilities • No Temporary Deep Trenches • Reduced Temporary Works
Cost Saving: • Proposed 16 Week Duration of Project • Material Reinstatement Costs, Tipping / Inert	Cost Savings: • As Built 5 Week Duration of Project • Reduced Material Reinstatement Costs
Environmental: • CO2 Emissions (tonnes) as Built – 52.8 • Noise • Dust	Environmental: • CO2 Emissions (tonnes) as Built – 12.5 • Reduced Noise • Reduced Dust

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