Eurocode 7
Eurocode 7 — Design Approach 1 (Combinations 1 and 2)
EN 1997-1:2004+A1:2013Revision 2Required FoS ≥ 1
Use it in Slope
In a design, choose it under Analyze → Design factor set, and the PDF report runs it too. It runs several checks: to change one, copy that check from the library's New set.
Checked against the standard · Slope convention · Not yet validated
The governing combination is the one with the highest utilisation (G3).
Known limitations
- Each combination runs its own search; the result is the combination with the highest utilisation.
Combination 1 — required FoS ≥ 1
Checked against the standard · Not yet validated
Known limitations
- Pore pressure is factored with the soil weight (×1.35), which EN 1997-1 permits but does not require (2.4.6.1(8)); a margin on the water level is the alternative.
- Variable loads are taken at their characteristic value; ψ factors (EN 1990) are not applied.
- Tendon, bar, plate, nail, layer and pile capacities are not factored: EN 1997-1 gives a factor only for an anchor's geotechnical pull-out (Table A.19).
Values
Actions
| Soil weightγ | Unfavorable | ×1.35 |
| Favorable | ×1.35 | |
| Permanent loadγG | Unfavorable | ×1.35 |
| Favorable | ×1.00 | |
| Variable loadγQ | Unfavorable | ×1.50 |
| Favorable | ×0.00 | |
| Seismic coefficientγE | ×1.00 | |
Resistance
| Earth / global resistanceγRe | ÷1.00 | |
Materials
| Effective cohesionγc′ | ÷1.00 | |
| Friction (tanφ′)γφ | ÷1.00 | |
| Undrained strength (cu)γcu | ÷1.00 | |
| Shear strength (other models)— | ÷1.00 | |
Reinforcement
| Anchor — pull-outγpo | ÷1.10 | |
Sources
Document: EN 1997-1:2004+A1:2013
Actions
| Factor | Value | Source |
|---|---|---|
| Soil weight — unfavorable | ×1.35 | A.3.1(1)P, Table A.3, A1 γG, PDF p136 · Tested against an independent reference |
| Soil weight — favorable | ×1.35 | 11.5.1(12), PDF p126 · Slope convention · Not yet validated — Single source: one factor on all soil weight (2.4.2(9)P NOTE); this slot is not read. |
| Permanent load — unfavorable | ×1.35 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Permanent load — favorable | ×1.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Variable load — unfavorable | ×1.50 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Variable load — favorable | ×0.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Seismic coefficient | ×1.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
Materials
| Factor | Value | Source |
|---|---|---|
| Effective cohesion | ÷1.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Friction (tanφ′) | ÷1.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Undrained strength (cu) | ÷1.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Shear strength (other models) | ÷1.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
Resistance
| Factor | Value | Source |
|---|---|---|
| Earth / global resistance | ÷1.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
Reinforcement
| Factor | Value | Source |
|---|---|---|
| Anchor — pull-out | ÷1.10 | A.6(2)P, Table A.19, R1, PDF p144 · Not yet validated |
Combination 2 — required FoS ≥ 1
Checked against the standard · Not yet validated
Known limitations
- Variable loads are taken at their characteristic value; ψ factors (EN 1990) are not applied.
- Tendon, bar, plate, nail, layer and pile capacities are not factored: EN 1997-1 gives a factor only for an anchor's geotechnical pull-out (Table A.19).
Values
Actions
| Soil weightγ | Unfavorable | ×1.00 |
| Favorable | ×1.00 | |
| Permanent loadγG | Unfavorable | ×1.00 |
| Favorable | ×1.00 | |
| Variable loadγQ | Unfavorable | ×1.30 |
| Favorable | ×0.00 | |
| Seismic coefficientγE | ×1.00 | |
Resistance
| Earth / global resistanceγRe | ÷1.00 | |
Materials
| Effective cohesionγc′ | ÷1.25 | |
| Friction (tanφ′)γφ | ÷1.25 | |
| Undrained strength (cu)γcu | ÷1.40 | |
| Shear strength (other models)— | ÷1.25 | |
Reinforcement
| Anchor — pull-outγpo | ÷1.10 | |
Sources
Document: EN 1997-1:2004+A1:2013
Actions
| Factor | Value | Source |
|---|---|---|
| Soil weight — unfavorable | ×1.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Soil weight — favorable | ×1.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Permanent load — unfavorable | ×1.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Permanent load — favorable | ×1.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Variable load — unfavorable | ×1.30 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Variable load — favorable | ×0.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Seismic coefficient | ×1.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
Materials
| Factor | Value | Source |
|---|---|---|
| Effective cohesion | ÷1.25 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Friction (tanφ′) | ÷1.25 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Undrained strength (cu) | ÷1.40 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
| Shear strength (other models) | ÷1.25 | A.3.2(1)P, Table A.4, PDF p136 · Slope convention · Not yet validated — EC7 gives γqu = 1.4 only for unconfined-strength models; other strength models take the M2 general 1.25. |
Resistance
| Factor | Value | Source |
|---|---|---|
| Earth / global resistance | ÷1.00 | 2.4.7.3.4.2, Tables A.3, A.4, A.14, A.19 · Not yet validated |
Reinforcement
| Factor | Value | Source |
|---|---|---|
| Anchor — pull-out | ÷1.10 | A.6(2)P, Table A.19, R4, PDF p144 · Not yet validated |