Non-cohesive (granular) soils and foundations

Sands and gravels are non-cohesive and generally have good drainage and bearing capacity when compact. Loose or saturated granular soils can be problematic. Ground investigation confirms density and water table; the structural engineer designs accordingly.

Non-cohesive (granular) soils and foundations usually becomes urgent when recurring symptoms begin affecting programme confidence, compliance, or delivery reliability.

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When you might need this

Teams usually investigate non-cohesive (granular) soils and foundations when early warning signs start affecting reliability, compliance, or project timelines. This is often the point where decision makers move from observation into scoped technical action.

Common warning signs

The symptoms below are the most common triggers we see before diagnosis and repair planning.

• Sand or gravel in boreholes
• Density and compaction important
• Dewatering may be needed in excavation
• Good bearing when compact
• Settlement still to be checked

What to expect from the work

Ground investigation provides parameters. We deliver strip, pad, raft or piling to the structural engineer's design.

How we approach the fix

We excavate and construct foundations to design. We manage water and compaction as specified. We provide certification.

Cost and complexity factors

Cost and complexity usually depend on access constraints, total scope, existing condition, and whether related works need to be coordinated in the same programme window.

How we work through the job

We keep delivery structured so scope, sequencing, and sign-off remain clear.

1. Step 1: Initial assessment

   What this step delivers: Root cause and scope are confirmed.

2. Step 2: Method planning

   What this step delivers: Practical repair strategy is agreed.

3. Step 3: Delivery and verification

   What this step delivers: Work is completed and validated.