LABOUR SUPPLY brochure - Flipbook - Page 30
Case studies: HS2, South Ruislip
HS2 WORKS, SOUTH
RUISLIP, MIDDLESEX
Sector Rail infrastructure
Client HS2 with SCS Railways as end-user / client
Location South Ruislip, Middlesex
Scope of works
Challenges and solutions
JGL delivered a full civil and structural package
for the South Ruislip Ventilation Shaft, including
the construction of two deep shafts, associated
headhouse structures, and underground
connections.
Works included:
Deep excavation and groundwater control
managed through continuous dewatering and
adaptive planning
Confined working conditions addressed with
phased logistics and multi-scale plant deployment
Complex interfaces between civil, structural,
and MEP elements coordinated through detailed
planning and modelling
High-precision installation requirements for castin components achieved through rigorous quality
control
* Deep excavation and construction of main and
satellite shafts
* Reinforced concrete base slabs, walls, and
secondary linings
* Construction of the ventilation basement and
headhouse structure
* Installation of maintenance adit (tunnel
connection)
* Comprehensive temporary works, lifting
systems, and access solutions
* Integration of MEP interfaces, cast-in
components, and drainage systems
* Delivery of multiple variation works, including
waterproofing, steel installation, and
diaphragm wall repairs.
Added value and strengths
Proactive planning and coordination reduced
rework and improved programme certainty
Efficient temporary works solutions accelerated
construction and enhanced safety
High-quality waterproofing systems improved
long-term durability and reduced maintenance
risk Precision engineering and detailing ensured
seamless integration with future works
Strong safety performance, with zero major
incidents across high-risk activities
Technical overview
Two shafts constructed:
Main shaft: 22m diameter, 36m deep
Satellite shaft: 14m diameter, 19.5m deep
Ground conditions: London Clay,
Concrete: 13,500m³+
Excavation (muck away): 41,000m³+
Reinforcement steel: 2,600 tonnes
Waterproofing: 5,600m²
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Joseph Gallagher Limited | Specialist, technical workforce supply
