Soil Compactibility Classes (2)

Based on the previous page, a finer differentiation and assignment of compactibility classes and soil types is done based on German standard which is used for the structural calculation of pipelines [ATVA127].

Table:

Soil Classification [DWAA139:2009]

Groups according to ATV-DVWK-A 127		Abbreviation as per DIN 18196	Compaction class as per ZTV A-StB 97
G1	non-cohesive soils, gravel,	GW widely graded gravel-sand mixtures GI alternately graded gravel / sand mixtures GE closely graded gravels	V1 V1 V1
G1	sand	SW widely graded sand / gravel mixture SI alternately graded sand / gravel mixture SE closely graded sands	V1 V1 V1
G2	semi-cohesive soils, gravel,	GU gravel / silt mixture GT gravel / clay mixture	V1 V1
G2	sand	SU sand / silt mixture ST sand / clay mixture	V1 V1
G3	mixed cohesive soils, fine-grained soils	GU gravel / silt mixture GT ) gravel / clay mixture SŪ sand / silt mixture ST ) sand / clay mixture UL slightly plastic silts UM medium plastic silts	V2 V2 V2 V2 V3 V3
G4	fine-grained soils, organic soils admixtures	TL slightly plastic clays TM medium plastic clays TA distinctly plastic clays UA distinctly compressible silt OU silt with organic admixtures OT clays with organic admixtures OH-coarse to mixed-grained soils mixed with humic admixtures	V3 V3 –^) –^) –^) –^) –^**)
COMMENTS: ) Cohesive soil with fines from 15% to 40% *) Not suitable for backfilling within the road space

Further soil characteristics according to EAU 1996 can be found in the following Table