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Index properties of the analyzed boulder clays and thickness of layers and sublayers_
| Properties\thickness | Boulder clay (brown) III layer | Boulder clay (gray) IV layer | IVa (m) | IVb (m) | IVc (m) | |
|---|---|---|---|---|---|---|
| Water content wn (%) | 10.0–11.0 | 10.5–13.5 | ||||
| Unit density ρ (t·m−3) | 2.1–2.2 | 2.1–2.2 | ||||
| Liquid limit wL (%) | 21.0–24.9 | 22.0–26.0 | ||||
| Plasticity index IP (%) | 11.0–13.0 | 12.0–14.0 | ||||
| Consistency index IC (−) | 0.93–1.0 | 0.89–0.96 | ||||
| Content of fraction (%): | ||||||
| Sand (0.063–2 mm) Sa | 62–63 | 56–59 | ||||
| Silt (0.002–0.063 mm) Si | 25–28 | 28–29 | ||||
| Clay (≤0.002 mm) Cl | 10–12 | 13–15 | ||||
| The thickness of layers and sublayers below the foundation level (m) (depth of foundation level = 4.4 m below ground level) | CPTs | 0.8–1.0 | 5.2 | |||
| 1.2 | 1.6 | 2.4 | ||||
| DMTs | 1.0 | 1.8 | 2.4 |
Results of statistical analysis of the dilatometer modulus ED and the constrained modulus M from DMTs_
| Test type/measure | Layers | Number of determinations n (−) | Mean value Xmean (kPa) | Min. value Xmin (kPa) | Max. value Xmax (kPa) | Standard deviation Sx (kPa) | Coefficient of variation Vx (−) |
|---|---|---|---|---|---|---|---|
| DMT: ED | III + IV together | 137 | 55,527 | 16,214 | 116,592 | 19,621 | 0.353 |
| DMT: M | 117,863 | 26,676 | 273,266 | 53,331 | 0.452 | ||
| DMT: ED | III | 20 | 85,336 | 16,214 | 116,592 | 20,287 | 0.238 |
| DMT: M | 201,715 | 26,676 | 273,266 | 51,754 | 0.257 | ||
| DMT: ED | IV | 117 | 50,432 | 23,683 | 87,444 | 14,233 | 0.282 |
| DMT: M | 103,529 | 40,265 | 205,619 | 38,277 | 0.370 | ||
| DMT: ED | IVa | 20 | 68,106 | 45,544 | 87,444 | 11,218 | 0.165 |
| DMT: M | 157,888 | 105,708 | 205,619 | 26,800 | 0.170 | ||
| DMT: ED | IVb | 36 | 54,552 | 29,039 | 74,582 | 11,225 | 0.206 |
| DMT: M | 115,362 | 52,880 | 164,621 | 27,986 | 0.243 | ||
| DMT: ED | IVc | 61 | 42,205 | 23,683 | 60,118 | 9,634 | 0.228 |
| DMT: M | 78,724 | 40,265 | 117,792 | 21,111 | 0.268 |
Results of statistical analysis of cone resistance qc and constrained modulus M from CPT_
| Test type/measure | Layers | Number of determinations n (−) | Mean value Xmean (kPa) | Min. value Xmin (kPa) | Max. value Xmax (kPa) | Standard deviation Sx (kPa) | Coefficient of variation Vx (−) |
|---|---|---|---|---|---|---|---|
| CPT: qc | III + IV together | 104 | 11,098 | 2,500 | 17,000 | 3,666 | 0.333 |
| CPT: M | 90,498 | 19,866 | 139,524 | 30,329 | 0.335 | ||
| CPT: qc | III | 15 | 8,493 | 2,500 | 16,000 | 3,773 | 0.444 |
| CPT: M | 69,384 | 19,866 | 131,175 | 31,093 | 0.448 | ||
| CPT: qc | IV | 89 | 11,537 | 5,200 | 17,000 | 3,459 | 0.300 |
| CPT: M | 94,056 | 41,349 | 139,524 | 28,707 | 0.305 | ||
| CPT: qc | IVa | 23 | 13,857 | 6,600 | 17,000 | 2,751 | 0.199 |
| CPT: M | 113,710 | 53,658 | 139,524 | 22,303 | 0.197 | ||
| CPT: qc | IVb | 31 | 13,661 | 10,000 | 17,000 | 2,100 | 0.154 |
| CPT: M | 111,646 | 81,312 | 139,326 | 17,343 | 0.155 | ||
| CPT: qc | IVc | 35 | 8,217 | 5,200 | 13,000 | 1,872 | 0.228 |
| CPT: M | 66,428 | 41,349 | 105,996 | 15,509 | 0.233 |
Characteristic values of the constrained modulus M from CPTs and DMTs and the calculated and measured settlements of pad footing H-16_
| Test type | Layers | Settlement calculated using | sm (mm) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mmean | Bayesian statistics | Schneider's formula | prEN 1997-1:2022-09 | ||||||||||
| Mmean (kPa) | Σscal (mm) | Mmean (kPa) | Σscal (mm) | Mk (kPa) | Σscal (mm) | Vx (−) | kn | (1 − knVx) | Mk (kPa) | Σscal (mm) | |||
| CPT | III + IV together | 90,498 | 7.8 | 90,498 | 7.8 | 75,261 | 9.4 | 0.335 | 1.67 | 0.441 | 39,910 | 17.7 | 7.0 |
| III | 69,384 | 50,020 | 53,292 | 0.448 | 1.82 | 0.185 | 12,840 | - | - | ||||
| IV | 94,056 | 8.3 | 100,900 | 9.1 | 79,621 | 10.2 | 0.305 | 1.68 | 0.488 | 45,899 | 27.4 | 7.0 | |
| III | 69,384 | 50,020 | 53,292 | 0.448 | 1.82 | 0.185 | 12,840 | - | - | ||||
| IVa | 113,043 | 125,079 | 101,420 | 0.197 | 1.75 | 0.655 | 74,480 | - | - | ||||
| IVb | 111,221 | 115,218 | 102,460 | 0.155 | 1.73 | 0.732 | 81,410 | - | - | ||||
| IVc | 66,428 | 8.2 | 66,688 | 9.1 | 58,560 | 9.6 | 0.233 | 1.71 | 0.602 | 39,990 | 24.4 | 7.0 | |
| DMT | III + IV together | 117,863 | 6.0 | 117,863 | 6.0 | 91,100 | 7.8 | 0.452 | 1.67 | 0.245 | 28,876 | 24.5 | 7.0 |
| III | 201,715 | 195,768 | 175,165 | 0.257 | 1.77 | 0.545 | 109,935 | - | - | ||||
| IV | 103,529 | 5.8 | 104,441 | 5.8 | 84,309 | 7.1 | 0.370 | 1.67 | 0.382 | 39,548 | 14.4 | 7.0 | |
| III | 201.715 | 195,768 | 175,165 | 0.257 | 1.77 | 0.545 | 109,935 | - | - | ||||
| IVa | 157,887 | 154,300 | 144,139 | 0.170 | 1.77 | 0.699 | 110,364 | - | - | ||||
| IVb | 115,361 | 118,200 | 101,117 | 0.243 | 1.71 | 0.584 | 67,371 | - | - | ||||
| IVc | 78,724 | 5.3 | 81,241 | 5.3 | 68,080 | 6.1 | 0.268 | 1.68 | 0.550 | 43,298 | 9.1 | 7.0 | |