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D50 Underpinning

GENERAL

115 UNDERPINNING DESIGN AND CONSTRUCTION
• Purpose: site specific.
• Extent: site specific.
• Standards: site specific.
• Requirement:
- Loads: site specific.
- Load factor: site specific.
- Assumed bearing strata: site specific.
- Design working life category: 25 years.
• Design proposals: Confirm as adequate for the particular ground conditions
revealed in the works or submit alternatives.

117 EUROCODES
• National Annexes: Reference to a Eurocode shall be deemed to include the
appropriate United Kingdom National Annex, and nationally determined
parameters shall apply.
• Substitution of alternative design rules for Application Rules: Permitted when it can
be demonstrated that the alternative rule is in accordance with the relevant
principles and that structural safety, serviceability and durability of the resulting
structure will be at least that required by the Eurocode.

120 PILING SPECIFICATION
• Standard: Comply with the current edition of 'Specification for piling and
embedded retaining walls' (SPERW) except where specified otherwise.
- Amendments to requirements: site specific.
• Substitution of British Standards for SPERW requirements: None.
• Definitions: Interpret references in SPERW as follows:
- Driven piles: Piles described in this section as displacement.
- Engineer: The person named in Preliminaries section A10 as administering the
contract on behalf of the employer.

125 PILE PERFORMANCE TESTS
• Submit: Proposals for demonstrating: site specific.

135 PILE WORKING PERFORMANCE
• Substandard performance: Give notice if the performance of any pile will be less
than that specified.

RotF generic (intermediate) NBS 2014 6118-AEW-XX-XX-NBS-A-01