LABOUR SUPPLY brochure - Flipbook - Page 36
Case studies: HS2, Mandeville Road
Engineering challenges and
solutions
Deep excavation stability: Managed through staged
excavation sequences, real-time geotechnical
monitoring, and adaptive temporary works design
to control ground movement
Groundwater control: Continuous dewatering
strategy supplemented by localised sealing and
lining systems to maintain dry and stable working
conditions
Interface with operational rail assets: Detailed
planning and coordination with Network Rail to
mitigate settlement risk and ensure compliance
with asset protection requirements
Confined shaft environment: Optimised logistics
planning, including vertical material handling
systems, shaft hoists, and multi-level working
platforms
Complex structural interfaces: Integration of SCL
primary linings with cast in-situ secondary linings
and RC shaft structures using precise setting-out
and tolerance control
Quality assurance: High-specification QA/QC
processes for sprayed concrete application,
reinforcement fixing, and cast-in component
installation
Added value and technical strengths
Robust temporary works and construction
sequencing minimised ground movement and
programme risk
Advanced SCL techniques enabled safe and
efficient excavation in constrained subsurface
conditions
High-integrity waterproofing and lining systems
designed to achieve long-term durability and asset
performance
Digital engineering and coordinated modelling
improved interface management across civil,
structural, and MEP disciplines
Strong safety performance maintained throughout
high-risk activities, including deep shaft
excavation and lifting operations
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Joseph Gallagher Limited | Specialist, technical workforce supply
