A14 Cambridge to Huntingdon Improvement Scheme | Causeway Geotech
Project Title:
A14 Cambridge to Huntingdon Improvement Scheme | Causeway Geotech
Date:
May to November 2016; additional supplementary phases completed in 2017, 2018, 2019 and 2020
Location:
Cambridge, England
Client:
A14 Integrated Delivery Team (Balfour Beatty / Costain / Skanska JV)
Business Sectors:
Civil Infrastructure
Services (Technical Disciplines):
Ground investigation / Geotechnical and Geoenvironmental Engineering
Project Objectives/ Outcomes:
Causeway Geotech were appointed by A14IDT to carry out the Ground Investigation for the proposed bypass road between Huntingdon and Cambridge. The scheme covers a total of 35km and the investigation was scoped to provide assessment of geo-environmental conditions to assist the design and construction of the highway and associated structures.
The investigation was successfully completed under the supervision of a Chartered Engineer and five Site Engineers from Causeway Geotech working closely with the Client’s Representative and Client alike.
Our Role:
Causeway Geotech acted as the main ground investigation contractor for the scheme.
The scope of works included:
- 158 Cable Percussion boreholes to a maximum depth of 20m
- 83 Rotary cored holes using Geobor-S techniques to a maximum depth of 55m
- 43 Dynamic sampling boreholes to a maximum depth of 10m
- 3 Light Percussion boreholes with rotary follow on utilising a slope climbing rig to a maximum depth of 25m
- Static Cone Penetration Testing (CPTs) at 4 locations
- 87 Trial pits with a mechanical excavator to 4.5m depth.
- Insitu testing including SPTs, Dynamic Cone Penetrometer, Plate Loading Tests
- Monitoring installations including standpipes, gas monitor wells, piezometers and triple vibrating wire piezometers (VWPs) which were installed using cement bentonite grout.
- Site monitoring of water levels and gas concentrations, PID headspace readings, interface probe readings and VWP downloads.
- Specialist surveys including Laser Induced Fluoresence (LIF) and sampling for suspected anthrax.
The works were carried out across a variety of terrain including agricultural land, parkland, river banks, existing structures, carparks, existing road verges and carriageways under control of Traffic Management on day and night shift.
Geoscience Ireland Contact:
Darren O’Mahony (Darren.omahony@causewaygeotech.com)
