Figure 1
Example of the DMTA decay curve from the Stegny site.
Figure 2
Scheme of groundwater flow to the DMT membrane (DMTC) and assumed segment of sphere (Garbulewski et al., [21]).
Figure 3
Location of test sites in the region of Poland.
Figure 4
Grain size distribution curve obtained from laboratory tests for mineral soil from the described sites.
Figure 5
Typical soil profile at the Stegny Pliocene clay site showing the main dilatometer test DMT results.
Figure 6
Typical soil profile at the SGGW Campus boulder clay site showing the main dilatometer test DMT results.
Figure 7
Typical soil profile at the Nielisz dam organic mud and mud site showing the main dilatometer test DMT results.
Table 1
Index properties of mineral and organic soils at the Nielisz, Stegny and SGGW Campus test sites (Interrim reports [22]).
| Sites | Soil type | Organic content Iom (%) | CaCO3 content (%) | Water content wn (%) | Liquid Limit wL (%) | Unit density of Soil ρ (t/m3) | Specific density of Soil ρs (t/m3) |
|---|---|---|---|---|---|---|---|
| Nielisz | Organic mud (Mor) | 20–30 | - | 120–150 | 130–150 | 1.25–1.30 | 2.25–2.3 |
| Organic mud (Mor) | 10–20 | - | 105–120 | 110–130 | 1.30–1.45 | 2.30–2.40 | |
| Stegny | Pliocene clays (Cl) | - | - | 19.20–28.50 | 67.6–88.0 | 2.1–2.2 | 2.68–2.73 |
| SGGW Campus | Boulder clay (clSa) | - | - | 5.20–20.10 | 21.9–26.6 | 2.0–2.2 | 2.68–2.73 |
Figure 8
Comparison of test results obtained with the proposed formula and obtained immediately after field tests with a dilatometer.
Figure 9
Comparison of the hydraulic permeability (kh) value between the measured and proposed chart from the Nielisz dam and Stegny sites.
Figure 10
Proposed relationship between DMT, tflex (in minutes) and hydraulic permeability of the soil.
Figure 11
Pressure dependencies p0 and p1 together with isolines to determine the clay fraction
Figure 12
Pressure dependencies p0 and p1 together with isolines to determine the silt fraction.
Figure 13
Pressure dependencies p0 and p1 together with isolines to determine the sand fraction.
Figure 14
Comparison of the soil fraction obtained from laboratory and dilatometer (DMT) tests results.