Soil Survey Report - Comparison

  • Erstellt am 2017-02-27 14:09:48

Lückenfüller

2017-02-27 14:09:48
  • #1
Hello everyone!

For a potential building plot from the city (not yet purchased, multi-family house for 3 parties), I have requested offers for a geotechnical survey. Now the following formulations appear:

Company 1:

"...Carrying out exploratory drilling in soils of soil classes 1 - 5 according to DIN 18 300 including sampling, depth approx. 5.00 – 6.00 m..."
"...Carrying out light dynamic probing according to DIN EN ISO 22476-2, depth approx. 5.00 – 6.00 m..."


Company 2:

"...Small percussion drilling ∅ 50/36 mm, for exploring the subsurface conditions from a geotechnical perspective, including repositioning the drilling equipment, classification of soil samples according to DIN 4022: (3 x 6 m = 18 m)..."

Cost-wise similar, different DIN standard. Are the services comparable or only marginally different?

The same regarding the "laboratory service"/chemical analysis of the soil:

Company 1:
"...Geotechnical investigation and foundation consulting with all services according to § 3, Appendix 1 HOAI (2011)..."
"...Not included item: Chemical analysis of a soil composite sample for parameters of the LAGA list TR soil..."


Company 2:
"...Evaluation of laboratory results, preparation of a project-related geotechnical expert report with description of the existing soil and groundwater conditions, specification of soil parameters, classification of the soils present into soil classes and soil groups according to DIN 18 300 and 18 196, indication of the allowable soil pressures and the expected settlements..."

Does Company 1 not conduct any laboratory analysis here (contaminated sites!), or is that already included in the HOAI?
 

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