10 
Part A - Introduction 
Execution 
Erection 
- Production of the 
foundation ele 
ments; 
- Inspection of the 
ground conditions 
with regard to con 
sistency with the 
design; inspection 
of production of the 
foundation body; 
monitoring of the 
development of ex 
cess pore water 
pressure in the load- 
bearing part of the 
foundation; monitor 
ing of subsidence 
and tilting of the 
foundation body. 
- Pile driving log/pile 
driving report, man 
ufacturing report re 
garding in-situ con 
crete piles; 
- Eventual deforma 
tion measurements, 
as far as is reasona 
ble; 
- Eventual excess 
pore water pressure 
measurements, as 
far as is reasonable; 
Monitoring in the con 
struction phase 
Supporting docu 
ments to be submit 
ted in connection 
with the inspection 
documents: 
- Reports of findings 
and assessments in 
the context of 
Standard Design 
audited by an 
inspector 
Operations 
Operations, 
maintenance 
and monitor 
ing 
- Monitoring struc 
tural behaviour un 
der working loads; 
- It should be made 
possible to be able 
to take counter 
measures in good 
time against behav 
iours which differ 
from those in the 
design. 
- Monitoring sediment 
dynamics in the ca 
ble route corridors 
within and outside 
the windfarm. 
- Deformation meas 
urements on se 
lected offshore 
structures within the 
offshore wind farm; 
- Monitoring scour at 
regular intervals on 
each foundation 
Operations monitoring 
(geotechnical monitor 
ing) 
Supporting docu 
ments to be submit 
ted in connection 
with the inspection 
documents: 
- Reports of findings 
and assessments 
audited by an in 
spector 
3 Provisions 
This guideline describes the minimum requirements of the Federal Maritime and Hydrographic 
Agency in its role as an approval authority regarding geotechnical surveys and investigations 
as well as field and laboratory studies including geotechnical assessments as part of the 
design basis for the structural components of an offshore wind farm as well as monitoring 
construction and operations. In this respect the present guideline is based on the Standard 
Design which conforms to Eurocode (EC) and the codes of practice set out in DIN. With re 
gards to subsoil, EC 7 (DIN EN 1997-1 and DIN EN 1997-2) with national annexes and sup 
plementary guidelines (DIN 1054 and DIN 4020 in particular, with their normative references) 
are decisive. Technical codes of practice, standards, guidelines etc., which are referred to by 
this standard are valid in their most current version. 
Geotechnical surveys and investigations must be coordinated with the planned foundation 
concept, where on the one hand the difficulties regarding the foundation structure and also 
the soil conditions and other boundary conditions on the other hand must also be properly 
taken into account. It must always be carried out in such a scope that all characteristics of the 
respective ground conditions can be established in good time before construction of the 
structures.