JJMac | Viking Link Case Study

Project	JJM2643 – Contractors Compound
Location	Bicker Fen Lincs
Client	Siemens / National Grid
Key works delivered	Treating Stockpile of 6E material to create 9A material Contractors Compound
Project Duration	Nov 2021 - 2 weeks
Stabilised Area	4000 m²
Earthworks	By JJMac Limited

3,000m² Contractors Compound for new works on Bicker Fen Substation.
1,000m³ of material had been lifted from previous Haul Road and contaminated with subsoil and Geo Textiles during the lifting process.
Stockpile of material could not be used without being classified and a treatment plan implemented.
JJMac tested and classified the material as suitable for CBM cement bound material.

The project had challenges to overcome as the material required a separation membrane to be placed at formation. This ruled out In-Situ mixing of the 6E material.
The 6E material had to be lifted and riddled to remove any fabric and terram etc. The lifted and riddled material was mixed with the cement binder ex-situ and placed on the new Terram, trimmed and Compacted Stockpile material being raked Bricker 1

To overcome the project challenges set by the client, our team:

Worked with the client and advised on the findings of the Stockpile material testing and classification.
The challenge was to turn the 6E material into 9A material by mixing with cement and complying with the stringent testing regime.
Our site team set to work. Mixing the host material at the Stockpile and placing on the Terram for trimming and compacting.
JJMac team devised a methodology in order to simplify the job and creating a work flow in the area to allow the works to progress in a timely manner.
The final layer was trimmed with GPS dozer to 30mm tolerance and compacted.

Mixing and placing of Stabilised Material in flow Bricker 2

All Earthworks and Screening of material was carried out by JJMac working with Siemens and the land owners to ensure that all Bio Diversity measures were adhered to at all times. Bricker 4

The works had numerous advantages to this site.

Re-use of Granular material from another Haul Road saving disposal costs.
Elimination of Primary Aggregates on the Compound.
Elimination of Stone Lorries from the Villages and surrounding Road.

Cost Saving

60%

Programme Reduction

30%

Vehicle Movements Reduction

90%

Imported Aggregate Reduction

95%

Material Sent To Landfill Reduced By

100%

Stone Layer Depth Reduction

25%

Treating Stockpile

VIKING LINK – CONTRACTORS COMPOUND