Case Studies

Clacton Flood Relief Tunnel Scheme - Essex

This project involved a 4.5 km flood relief tunnel along Clacton seafront. The scheme presented significant geotechnical challenges related to the stability of the London Clay cliffs and the presence of water-bearing granular deposits along the proposed tunnel alignment. Continue reading

Hobhole Pumping Station Replacement - Fishtoft, Lincolnshire

The scheme involved site investigation works for the replacement of the Hobhole Pumping Station and associated infrastructure. The investigation supported design of the new pumping station, cofferdam, crane and piling mats, and access improvements. Continue reading

Benacre and Kessingland Flood Risk Management Project - Suffolk

Client: Perfect Circle JV on behalf of the Internal Drainage Board Contract Value: Circa £205k Role: Principal Contractor This project involved the construction of two flood banks and two pumping stations south of… Continue reading

Geotechnical – Foreshore investigation – Southend-on-Sea

Project overview A F Howland Associates were commissioned to investigate ground conditions for the replacement of ramps and jetties in Southend-on-Sea as part of a maintenance contract. The work required nearshore and offshore investigations… Continue reading

Geotechnical - Subsidence investigation – Norwich

Project overview On Christmas Eve in 2010, a property in Finklegate, Norwich, experienced significant subsidence, with an estimated movement of 300 mm. Consulting Engineers Canham Consulting engaged us to carry out a site investigation… Continue reading

Geotechnical - £28 million 4.5 km foul sewer emplacement – Clacton

Project overview Anglian Water Services Limited commissioned the emplacement of a 4.5 km foul water flood relief tunnel along Clacton seafront. The project posed significant geotechnical challenges, particularly regarding the stability of the London… Continue reading

Geotechnical - Realignment of the B1039 Royston Road – Chrishall, Essex

Project overview The B1039 Royston Road was proposed to be realigned to reduce traffic loadings that were contributing to the failure of an adjacent retaining wall (Chrishall Retaining Wall, Essex County Council Bridge No. Continue reading

Geotechnical - Geotechnical consultancy for trenchless construction – West Coast Mainline Route Modernisation, Staffordshire

Project overview As part of the West Coast Mainline Route Modernisation works, multiple trenchless constructions were required in the form of guided auger bores for utility installations. Perco Engineering Services Limited was tasked with… Continue reading