CAN CSA-S501-2014 Moderating the effects of permafrost degradation on existing building foundations (First Edition).pdf

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39、1-14National Standard of CanadaCAN/CSA-S501-14Moderating the effects of permafrost degradation on existingbuilding foundationsDecember 2014 2014 CSA Group 1ContentsTechnical Committee on Northern Built Infrastructure 3Working Group on Permafrost Degradation 5Preface 60 Introduction 71 Scope 71.1 Mit

40、igation techniques and other actions 71.2 Applicable foundation types 81.3 Application 81.4 Terminology 82 Reference publications 93 Definitions 94 Measures to maintain permafrost beneath and adjacent to existing buildings or structures 114.1 General 114.2 Site grading and drainage 124.3 Ventilation

41、 134.4 Snow management 134.5 Monitoring the effectiveness of existing mitigation measures 134.6 Ground temperature monitoring 135 Assessment of structures impacted by changing permafrost conditions 135.1 General 135.2 Indicators of potential permafrost related foundation distress 135.3 Initial site

42、investigation 165.3.1 General 165.3.2 Types of background information to collect 165.3.3 Inspection of structure and site 165.3.4 Collection of site-specific subsurface data 175.3.5 Preparation of an investigation report 175.4 Establishing a monitoring program 185.4.1 General 185.4.2 Observations an

43、d documentation to be included 185.4.3 Collection of ground temperature data 185.5 Producing a final evaluation report 186 Mitigation techniques for structures impacted by changing permafrost conditions 196.1 Applicability of remediation techniques to different foundation types 196.2 Coordination of

44、 remediation work activities 206.3 Site techniques 206.3.1 Shading 206.3.2 Drainage 20CAN/CSA-S501-14Moderating the effects of permafrost degradation on existingbuilding foundationsDecember 2014 2014 CSA Group 26.3.3 Snow accumulation management 206.4 Techniques applied to the building or structure

45、216.4.1 General 216.4.2 Ventilation 216.4.3 Ground insulation 216.4.4 Foundation adjustment and levelling 216.4.5 Mechanized refrigeration or thermosyphons 226.4.6 Foundation replacement 226.5 Abandonment and demolition 226.5.1 Site abandonment 226.5.2 Structure demolition 227 Long term performance

46、of foundation rehabilitation 22Annex A (informative) Background information on foundation types for permafrost areas 24Annex B (informative) Background information on permafrost 35CAN/CSA-S501-14Moderating the effects of permafrost degradation on existingbuilding foundationsDecember 2014 2014 CSA Gr

47、oup 3Technical Committee on Northern BuiltInfrastructureS. Brown Northwest Territories Association of Communities(NWTAC),Yellowknife, Northwest TerritoriesCategory: Owner/Operator/ProducerChairJ. Streicker City of Whitehorse,Whitehorse,YukonCategory: General InterestVice-ChairH. Auld Risk Sciences I

48、nternational,Ottawa, OntarioCategory: Supplier/Contractor/Consultant InterestS. Dueck Yukon Government Community Services,Whitehorse,YukonCategory: Government and/or Regulatory AuthorityD.W. Hayley Hayley Arctic Geoconsulting,Kelowna, British ColumbiaCategory: Supplier/Contractor/Consultant Interest

49、K.R. Johnson Stantec Consulting Ltd.,Edmonton, AlbertaCategory: Supplier/Contractor/Consultant InterestC. Larrive OURANOS Impacts b) provide an explanation of circumstances surrounding the actual field condition; andc) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address theissue.Committee interpretations are processed in accordance with the CSA Directives and guidelines governingstandardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.5) This Standard is subject to