JGL Corporate brochure - Flipbook - Page 43
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
Joseph Gallagher Group | CORPORATE PORTFOLIO | 2026
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