Turning site investigation results into design decisions
Site investigation data becomes valuable when it changes a design decision. The engineering task is to connect observed ground conditions and test results to foundations, earthworks, drainage, temporary works and construction risk.
Build a ground model
Logs and test results are interpreted together to describe the likely sequence and variability of materials across the site. The model should identify uncertainty between investigation points, groundwater observations and any zones that may behave differently during excavation or loading.
Compare options against the evidence
Foundation type and depth depend on loading, settlement tolerance, bearing conditions and constructability. Earthworks decisions also need information on material suitability, compaction and moisture sensitivity. The report should give designers parameters and constraints without pretending that limited observations remove all uncertainty.
Carry assumptions into construction
Design drawings, specifications and tender information should state the ground assumptions that matter. During construction, exposed conditions can then be checked against the investigation. A clear hold point or engineer review process helps the team respond when the ground differs from the model.