Groundwater Management in Underground Construction
Groundwater behaviour within soil and rock masses remains unpredictable, especially in mixed-face conditions or fractured geology. Excess water ingress can increase hydrostatic loading, reduce lining durability, and impose significant structural stresses during both temporary and permanent works. Effective groundwater control requires precise design, reliable drainage pathways, and long-term resilience.
Hydrostatic Pressure and Its Impact on Tunnel Linings
Hydrostatic pressure accumulation behind linings is a primary cause of cracking, reinforcement corrosion, and progressive structural degradation. Inadequate water redirection intensifies loading conditions and accelerates maintenance demands. A controlled system is therefore essential to mitigate pressure buildup across the service life of the structure.
Drainage Mesh Solution for Continuous Pressure Relief
The webinar introduces a proven drainage mesh system that integrates directly into monolithic shotcrete applications. This method establishes continuous and controlled water pathways, allowing pressure to be relieved before it transfers onto the lining. The approach enhances structural durability, shortens construction cycles, and significantly reduces CO₂ footprint compared with conventional methods.
Key Learning Outcomes
- Understanding the technical challenges associated with groundwater ingress and hydrostatic loading
- Principles of continuous drainage design integrated within tunnel linings
- Performance benefits of mesh-based drainage systems in reducing maintenance and construction duration
- Review of international case studies demonstrating long-term effectiveness
Presenter – Johnny Poulsen
Johnny Poulsen, CEO of Dolenco Tunnel Systems, brings over 25 years of specialist experience in waterproofing solutions for underground structures. His expertise spans tunnelling, basements, retaining structures, and advanced drainage technologies, with a focus on sustainable and adaptable engineering solutions.
Why This Topic Matters
Effective groundwater and hydrostatic pressure control is fundamental to the long-term performance of underground structures. Engineers seeking to improve durability, optimise construction efficiency, and enhance resilience against water-related deterioration will benefit from the practical guidance and proven methodologies presented in this session.
If you have any questions or would like to discuss how these topics relate to your projects, please feel free to contact us.