Improvement in Dundee addresses the variable subsurface conditions shaped by glacial till, alluvial deposits, and post-industrial fill common along the Tay Estuary. Techniques are selected to meet the requirements of Eurocode 7 and BS 8004, ensuring bearing capacity and settlement control on sites where natural soils are too weak or compressible. Our approach often begins with unsaturated soil analysis to characterise near-surface silts and clays, followed by targeted solutions such as stone column design to reinforce soft cohesive strata.
These methods support residential developments, commercial warehouses, and infrastructure upgrades where deep foundations are uneconomical. For time-sensitive projects on compressible clays, we combine prefabricated vertical drain (PVD) design with surcharge to accelerate primary consolidation. Where granular soils pose liquefaction or densification challenges, vibrocompaction design delivers reliable, verifiable improvement. Every scheme is tailored to Dundee’s ground profile, balancing performance with practical execution.
Soil improvement comprises a set of techniques aimed at modifying the mechanical, hydraulic or strength properties of the ground, allowing construction on soils that originally would not meet design requirements. Its application is common in zones with soft, loose, expansive, collapsible soils or those with liquefaction potential under seismic loading.
Densification techniques include vibrocompaction for granular soils (improves relative density), dynamic compaction through controlled mass drop, and stone columns (vibroreplacement) which provide reinforcement and vertical drainage. Their effectiveness is verified through SPT, CPT tests and settlement measurements during and post-treatment.
Grouting (jet grouting, permeation, compaction grouting) modifies soil through cementitious, chemical or resin slurries that fill voids, increase strength and reduce permeability. Applications include excavation support, impermeable cutoffs, improvement of existing foundations and consolidation of collapsible or soft terrains.
Accelerated drainage techniques (prefabricated vertical drains, sand drains) reduce consolidation times in saturated cohesive soils, complemented with static surcharge. Monitoring of settlements, pore pressures and lateral deformations through specific instrumentation allows validation of acceptance criteria compliance and proceeding with construction on improved soil.