JJM 3037 – Storage Yards – Remediation and Stabilisation
Project
JJM 3037 – Storage Yards – Remediation and Stabilisation
Location
Melton Road North Ferriby Hull
Client
RIX Group
Key works delivered
RDC Rapid Dynamic Compaction and Capping Stabilisation
Project Duration
6 weeks
Stabilised Area
40,000m2 RDC and Stabilisation
Earthworks
By JJMac Ltd
PROJECT OVERVIEW
Capping and Re-development of the former Local Authority Land Fill
The site required approx 20,000m3sup> of Material Remediation – to provide 600mm deep separation Capping Layer
Site to be used for Parking and storage in the short term
PROJECT CHALLENGES
Developing Remediation Strategy with Client and Consultants for submission and approval by EA to ensure the works are carried out efficiently and Cost effectively.
The project has a very stringent Validation Testing and Compliance schedule.
Proximity to other businesses on site meant very well managed works and deliveries were always required.
ENGINEERING AND SOLUTIONS TO OVERCOME THE CHALLENGES
Validation of soils to show that all soil concentrations are below the site specific remediation targets (SSRT) for the protection of human health, controlled waters and the wider environment.
Locked in stabilisation was specified for the Made Ground soils that were deemed to have soil leachate exceedances (with a min treatment thickness of 600 mm).
Replacement of material (as part of the cut and fill) in accordance with the Earthworks Specification and engineering requirements.
Our site team set to work with the MC team to develop a system to allow both earthworks and stabilisation to progress efficiently.
All Environmental Permitting including Standard Rules SR2008 remediation Permits including MPP2 – Mobile Plant Licence for Remediation of Land and Groundwater submitted by JJMac Ground Stabilisation Limited
REMEDIATION and STABILISATION WORKS
JJMac operate a fleet of very agile equipment.
Tractor mounted Wirtgen 250WS Mixers were selected for this project due to the challenging site conditions earlier on in the project.
Our Dustless Stehr was also utilised for all works near the existing offices during any windy
conditions which enabled us to progress works in all conditions.
REMEDIATION and STABILISATION WORKS
JJMac carried out Topographical Surveys of the site and created a Finished Level Model for the GPS Dozer
RDC Rapid Dynamic Compaction was carried out on the Land Fill Site prior to stabilisation of the Capping layer. The RDC will ensure sufficient compaction in the upper 2.0m of existing fill.
This particular 16tn RDC roller will influence approx 6.0m deep 300mm layers for cement stabilsiation.
EXCAVATIONS AND REMOVAL OF OBSTICLES
Sitewide excavations to approx. 600mm deep was undertaken to ensure a clean separation capping is provided between the landfill and finished levels
Screening and Crushing of made ground material was carried out prior to being replaced in 300mm layers for cement stabilsiation.
STABILISATION WORKS
Stabilisation was undertaken using Tractor Mounted Wirtgen WS320. Daily productivity by the stabilisation crew approx. 4,000m2 per day
COMPLETED WORKS
Stabilisation Layers completedType1 Capping to stabilised material
ADVANTAGES
The Cement Stabilisation works had numerous advantages to this site.
Encapsulation of all leachates with cement binder reducing the need for any offsite disposal.
Capping layers and subbase replacement offers huge Reduction of Primary Aggregates.
RDC Rapid Dynamic Compaction was carried out on the Land Fill Site prior to stabilisation of the Capping layer. The RDC will ensure sufficient compaction in the upper 2.0m of existing fill.
Type1 Capping to stabilised material
