A127/A130 Fairglen Interchange

A new ‘Southern Link Road’ linking the A130 southbound to a new signalised junction on the A1245.

Client: Ringway Jacobs (Supervisor) |Essex Highways (Client)

Project Value: Part of £1bn pipeline of infrastructure investment.

Site Investigation Value: £228,700

Project Overview:

The project involved a new ‘Southern Link Road’ linking the A130 southbound to a new signalised junction on the A1245. Widening of slip roads on all Fairglen Roundabout arms, additional slip lanes on both A127 on-slip roads, improvements at Rayleigh Spur Roundabout and a new bridge for pedestrians and cyclists.

Site Investigation Overview:

The purpose of the contract was to undertake an intrusive ground investigation on land surrounding the highway and supply the client and their designers with information regarding geological, geotechnical and geo-environmental conditions present on the site.

What did Soils Limited Bring To The Table:

As part of the tending process the site was considered in context to its surrounding environs to allow suitable facilities to complete the contract safely. On successful tending planning of the activities was commenced to allow production of a site risk assessment and method statement (RAMS). The site was classified as a yellow and suitable PPE and safety equipment were determined to complete site activities safely regarding contamination. Considerations were given to the type of activities required to complete the site works and their specific health and safety requirements.

The site spanned multiple landowners, which required management and coordination to limit the impact on the owners and their land. Landowners were contacted to introduce Soils Limited, explain what we were going to be doing, when we would like to undertake the works, what we would be brought onto their land, the impacts this could cause and how we would minimise disturbance to their land. We then worked closely with landowners, listening to concerns and works modified where necessary.

The site works included cable percussive drilling, windowless sampler drilling, machine excavated trial pitting and hand excavated trial pitting for underground utility identification. Site reconnaissance was undertaken to determine site logistics and any health and safety considerations regarding environs.

The investigation included:

· Full utility clearance and surveying of service locations

· 14 No. Cable percussive boreholes

· 25 No. Machine excavated trial pits

· 6 No. Windowless sampler holes

· 6 No. Hand dug trial pits

· 26 No. Hand dug service slit trenches

· 11 No. Continuous Surface Wave tests to measure ground stiffness

· Logging of exploratory holes in accordance with BH5930:2015

· Chemical laboratory analysis

· Geotechnical laboratory analysis

· Factual reporting

On successful completion of the investigation the project was reviewed, experiences noted, and any improvements identified for further contracts.