Part B - Verifications and approval requirements
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To the extent that subsoil deformations are relevant in terms of the design but cannot be pre
dicted with the necessary level of accuracy, the resulting problems shall be bypassed using
suitable design measures if circumstances permit. Otherwise, the observation method in ac
cordance with DIN EN 1997 (EC 7) shall be applied (Appendix 3-IV).
Where cyclic loads are applied to an offshore structure, one can expect the load-bearing be
haviour of the foundation to differ considerably from that of static and variable loads. Cur
rently, there are no generally accepted or suitably validated calculation models for designing
foundation elements which are subject to cyclic loads. Accordingly, the codes of practice set
down in this standard do not currently contain any standard regulations in this respect. With
respect to the application of the codes of practice set down in this standard to offshore wind
turbines in the EEZ, the scope for action with regard to planning and testing within the current
application process is specified in the application notes contained in the Appendices 3-I.2,
3-I.3, 3-I.4 and 3-II.
3.2 Development phase
3.2.1 Technical codes of practice
The technical codes of practice to be applied are detailed in section B3.3.1.
3.2.2 Requirements and required verifications
The requirements pertaining to the geotechnical documents and required verifications during
the development phase are regulated in the Standard Ground Investigations.
3.2.3 Documents to be submitted for the 1 st release
The documents required to obtain the 1 st release shall be supplemented by the following veri
fied geotechnical documents in accordance with the BSH Standard Ground Investigations:
[Doc. No. 310] Geological report,
[Doc. No. 311] Preliminary ground investigation report
[Doc. No. 312] Subsoil and foundations survey (development phase)
[Doc. No. 313] Verification report pertaining to Docs. No. 310, 311 and 312.
3.3 Design phase
3.3.1 Technical codes of practice
3.3.1.1 Hierarchy of codes
The foundation elements shall be designed in accordance with Eurocode 7; in addition, the
DIN standards in their respective latest white copy versions shall also apply. The BSH reserves
the right to exclude individual standards or parts thereof from the obligation to apply the
above standards.
In addition, the following provisions of this standard shall apply:
Appendix 3-I Consideration of cyclic loads in the design of foundation elements
Appendix 3-II Verification of the limit states for foundation elements taking into ac
count cyclic loading
Dynamic pile load tests
Appendix 3-ill