Geotechnical Structures.
Retaining walls, foundations and ground engineering
for complex and challenging site conditions.
What lies beneath
matters most.
Ground conditions govern foundation choices, retaining wall design and site feasibility. Geotechnical engineering done right means fewer surprises during construction and a structure that performs reliably for its full design life.
IGG provides complete structural design for geotechnical structures of all types — from simple gravity retaining walls to complex embedded sheet pile systems, slope stabilisation works and deep foundation solutions. We work directly from geotechnical investigation reports and coordinate with geotechnical specialists to deliver structural documentation that reflects actual ground conditions, fully compliant with Eurocode 7.
Start Your Project- Gravity retaining wall design (EC7)
- Cantilever & counterfort wall design
- Sheet pile & embedded wall design
- Slope stability analysis & stabilisation
- Shallow foundation design (EC7)
- Deep foundation & pile cap design
- Ground anchor & tie-back design
- Embankment & fill structure design
- Drainage & waterproofing coordination
- Permit & construction documentation
- Peer review & quality assurance
Ground is never uniform.
Design must account for uncertainty.
Eurocode 7 Limit States
EC7 requires checking multiple geotechnical limit states — bearing resistance (GEO), sliding, overturning, structural failure (STR) and hydraulic heave (HYD). We verify all applicable limit states using Design Approach 1 with the correct partial factors.
Earth Pressure & Water
Lateral earth pressure — active, passive and at-rest — governs retaining wall and basement design. We account for groundwater conditions, drainage effectiveness and the influence of surcharge loading from traffic, structures and construction operations.
Settlement & Differential Movement
Absolute and differential settlement between foundation elements can cause structural distress in the superstructure. We size foundations to limit settlements within acceptable bounds and flag where variable ground conditions require special attention.
Slope Stability
Cut slopes, embankments and natural hillsides must be assessed for rotational and translational failure mechanisms. We calculate factors of safety under drained and undrained conditions, and design stabilisation systems where required.
Pile Design & Testing
Deep foundations require careful design of pile capacity in both compression and tension, group effects, negative skin friction and pile settlement. We size piles from soil parameters and coordinate pile testing programmes where required.
Working with Limited Investigation
Many projects have limited geotechnical data. We apply appropriate conservatism where ground conditions are uncertain, recommend targeted additional investigation where risk warrants it, and design structures that are robust to ground variability.
What we design.
Retaining Walls
Gravity, cantilever, counterfort and sheet pile walls for cut slopes, terracing and basement excavations.
Deep Foundations
Bored and driven pile systems, micro-piles and ground anchors for poor or variable ground conditions.
Slope Stabilisation
Soil nailing, rock anchoring, drainage schemes and reinforced fill for unstable slopes and embankments.
Basement Structures
Waterproof reinforced concrete basements, underpinning schemes and below-ground retaining systems.
Have a geotechnical project?
Send us your brief and we'll scope it within 24 hours.