Protectionofbelowgroundstructures againstwateringress-Codeofpractice
Publishing and copyright information
Published by BSI Standards Limited 2022
Contents
Page
Scope Foreword iii 1Normative references 13 Terms and definitions Design philosophy 24.1 4 General 4 44.2 Design team 54.3 Principal considerations Figure 1 - Design flowchart 5 85 Site evaluation 95.1 5.2 Inspection and survey for existing structures General 10 96 Water resisting design 126.1 Waterproofing protection Groundwater 12 136.2 Figure 2 Schematicilustrations ofType A Type Band Type C waterproofing protection TypeA (borrier) protection 15Figure 3 -Schematic ilustrations of Type A Type B and Type Cwaterproofing protection Type B (structurally integral) protection 15Figure 4 - Schematic ilustrations of Type A Type B and Type C waterproofing protection TypeTable 1 Use of different protection types based on woter toable classificotion C (drained) protection 16 17Table2Waterproofing protection Grades ofperformance forbelow ground spces 196.3 External sub-surface drainage Exclusion of surface water 20 206.4 Figure 5 - Sub-surface drainage positioning 216.5 Buried decks below ground level 226.6 Figure 6 - Typical details of a buried deck with drainage Ground gases 23 247 General construction issues 247.1 7.2 Site dewatering Unexpected hazards 24 257.3 Structural elements 267.4 Protecting waterproofing Continuity in construction 26 267.5 8 Type A (barrier) protection 278.1 Structural aspects 2Figure 7 - Effect of structure on applied waterproofing barrier Figure 8 - Exomples of pile to floor slab junction 298.2 Waterproofing barrier materialsTable 3 - Waterproofing barriers Figure 9 - Effect of bonded or partially bonded barriers 31 339 Type B (structurally integral) protection 369.1 9.2 Materials for structurally integral protection General 98 369.3 Embedded retaining walls 3910 Type C (drained) protection 4110.1 Structural aspects 41
10.2 Cavity drain systems 41Figure 10 - Example of α multi-level system 4410.3 Figure 1 - Example of a food loop discharge Servicing and maintenance 46 4711 Remedial measures 4811.1 External grouting or injection General 48 4911.2 11.3 Repair with cementitious or polymeric systems 5011.4 Replacement of locally defective material 5011.5 Masonry structures Bibliography 5152
Foreword
Publishing information
This British Standard is published by BSI Standards Limited under licence from The BritishStandards Institution and came into effect on 31 March 2022. It was prepared by Technical Committee B/526 Geotechnics. A list of organizations represented on this mittee can be obtainedon request to its mittee manager.
Supersession
This British Standard supersedes BS 8102:2009 which is withdrawn.
Information about this document
s s (6) otd aea Supaans 06 u pausnd Aeuo sem pepus usg sa full revision of the standard and introduces the following principal changes:
2) an increase in the provision of residential basements;
3) development and use of new materials for waterproofing:
b) a more detailed assessment is provided of the risks inherent in below ground construction andhow these might best be addressed.
It is noted that the figures used in this document are only representative of different installation methods and are not to be translated directly into practice without first checking all the parametersspecific to the installation.
This publication can be withdrawn revised partially superseded or superseded. Information regarding the status of this publication can be found in the Standards Catalogue on the BSI website /standards or by contacting the Customer Services team.
Where wehsites and webpages have been cited they are provided for ease of reference and arecorrect at the time of publication. The location of a webpage or website or its contents cannotbe guaranteed.
Use of this document
As a code of practice this British Standard takes the form of remendations and guidance. It is notto be quoted as if it were a specification. Users are expected to ensure that claims of pliance are not misleading.
Users may substitute any of the remendations in this British Standard with practices ofequivalent or better oute. Any user claiming pliance with this British Standard is expected tobe able to justify any course of action that deviates from its remendations.
It has been assumed in the preparation of this British Standard that the execution of its provisions will be entrusted to appropriately qualified and experienced people for whose use it hasbeen produced.
