Xponexus Engineering • Geotechnical Engineering

Bearing Capacity (EC7 UK NA)

Standalone preliminary strip-footing check for DA1 Combination 1 (A1+M1+R1) and Combination 2 (A2+M2+R1), with groundwater sensitivity, eccentricity effects, and a structured engineering report.

EN 1997-1 UK NA factors Drained / Undrained Xponexus branded output

1) EC7 UK NA setup

Combination mode

Action model

UK NA Set B/Set C factors and M1/M2 parameters are used in this standalone tool.

2) Geometry and groundwater

Footing width B (m)

Embedment depth D (m)

Water table depth below GL (m)

Water unit weight γw (kN/m³)

Effective unit weight is reduced when water table is above foundation level.

3) Soil parameters (characteristic)

Analysis type

φ′k (deg)

c′k (kPa)

Bulk unit weight γ (kN/m³)

cu,k (kPa)

M2 factors apply to tanφ′, c′ and cu in accordance with UK NA approach.

4) Actions (characteristic per m run)

Permanent line load Gk (kN/m)

Variable line load Qk (kN/m)

Applied moment Mk (kNm/m)

Moment creates eccentricity e = M/N and effective width B′ = B − 2e.

5) Engineering sketches (Xponexus)

Strip footing geometry used for the simplified per-metre strip check.

Eccentric loading reduces effective width and increases design bearing stress.

6) Summary

Combination 1

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Combination 2

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Governing

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Scope: This is a concept/preliminary design check. Final designs should apply full EN 1997-1 procedure, ground model calibration, settlement assessment, and project authority requirements.

7) Report

Press “Run calculations”.