A414 Chelmsford to Harlow

The A414 Chelmsford to Harlow works involved an on-and-off carriageway intrusive ground investigation and pavement investigation to assist in the redesign, modification and widening of the carriageway

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

Site Investigation Value: £77,700

Project Value: £16m

Soils Limited was contracted to undertake an intrusive ground investigation of the site and to establish the ground conditions, suitability of the natural geological strata as a founding stratum, to undertake a pavement investigation of the existing surfaces and locate and confirm any and all services running adjacent to the carriageway. 

Using our extensive experience in large road widening / alteration schemes, Soils Limited successfully supervised the site works which involved traffic management on busy ‘A’ roads and four way roundabouts.

Site works comprised:

– Full utility clearance and surveying of locations and services

– 2No Boreholes using a dynamic windowless sampling rig

– 12No. Concrete coring locations 

– 12No. Dynamic cone penetrometer tests

– 6No. Hand excavated slit trial pits to identify services

– Logging of windowless sampler boreholes in accordance with BS5930:2015 

– Logging of road cores 

– Chemical Laboratory Analysis

– Geotechnical Laboratory Analysis

– Onsite PAH testing

– Factual Reporting 

– Pavement investigation reporting

Soils Limited’s in-house surveying team carried out a full GPR survey of the embankments in order to locate a service that was reported on the STATS plans but was not found within any of the slit trenches. This survey resulted in additional potential target being identified.

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