AE-02 Open cut method module: Installation of Pipes

Compaction Test

Dynamic Plate Load Test (2)

The conversion of the dynamic modulus of deformation EVd to the degree of compaction DPr is carried out using the following table.

Table: 

Excerpt from "Assignment of degree of compaction and deformation modulus VV2 or EVd (according to ZTVE-StB 94, ZTVT-StB 95, Federal Railway Guideline A2015)".
Soil group according to DIN 18196 Degree of compaction
DPr in %		 Dynamic modulus of deformation
Dynamic Plate Load Test EVd
Gravels and sands with ≤ 7 wt. %
< 0.0025 in (0,063 mm) (GW, GI, GT, GU)		 ≥ 100 ≥ 50 MN/m²
≥ 98 ≥ 40 MN/m²
≥ 97 ≥ 35 MN/m²
Narrow-graded gravels and sands, wide-graded and intermittent sands (GE, SE, SW, SI)
 ≥ 100 ≥ 40 MN/m²
≥ 98 ≥ 35 MN/m²
≥ 97 ≥ 32 MN/m²
Mixed-grained gravels and sands with 7 – 15 wt. % n < 0.0025 in (0,063 mm) (GU, GT, SU, ST) ≥ 100 ≥ 35 MN/m²
≥ 97 ≥ 25 MN/m²

 

The use of the dynamic plate load test is severely restricted in soils containing coarse gravel or stones, since even a single stone > 2.5 in (63 mm) near the load plate has a considerable influence on the measurement results. In these cases, a layer of fine sand must be prepared in advance, on which the plate load test is then performed. The following pictures show a trench bottom that requires a levelling layer of fine sand.

Video: HMP LFG4 - The dynamic plate load test by means of the Light Weight Deflectometer [YouTube]

/ 92