CONDITION APPRAISAL AND REMEDIAL TREATMENT CIRIA Research Project RP692 MASONRY AND BRICK ARCH BRIDGES:

Dr. John Perry(Project Director) Mr. Leo McKibbins(Project Manager) Dr. Carlos Sicilia(Co-author) Professor Clive Melbourne(Co-author) Mr. Simon Walker(Co-author) CONDITION APPRAISAL AND REMEDIAL TREATMENT MASONRY AND BRICK ARCH BRIDGES:

The problem:  Masonry arch bridge construction long abandoned in the UK  UK transport network dependent on masonry and brick arches  Subjected to ever increasing traffic levels, speeds and loads  Frequently 100+ years old  Some are damaged or have simply deteriorated gradually NEED FOR MAINTENANCE, REPAIR AND STRENGTHENING NEED FOR BEST PRACTICE GUIDANCE

UK Infrastructure Key elements of UK transport infrastructure:  Network Rail  London Underground Limited  British Waterways  Highways Agency

British Waterways  canals circa 1800's

Network Rail  railways circa 1850's

London Underground  underground circa 1900's

Highways Agency  motorways and trunk roads circa 1960's onwards

 canals circa 1800's  railways circa 1850's  underground circa 1900's  motorways and trunk roads circa 1960's onwards UK infrastructure

Magnitude of the problem: Masonry and brick arches comprise:  40% of UK bridge stock (largest single group)  40,000 arch highway bridges  33,000 railway arch spans  Very high proportion of British Waterways’ assets

 To present best practice guidance  To facilitate knowledge sharing  To provide an enabling document  To have national application  To recommend maintenance strategies representing best value for money  To provide impartial assessment and advice Purpose of the Project

Main User Groups The report should provide guidance for:  Clients (asset owners and operators) in railways, road and canals infrastructures  Engineers (consultants and contractors)  Maintenance managers

Approach  Asset Management  Structural Behaviour of masonry and brick arch bridges  Loss of bridge performance  Condition appraisal and assessment of capacity  Preventative, remedial and strengthening measures  Monitoring  Environmental and heritage considerations  Future research

Method  Literature review  Consultation  Case histories  Assessment of information  Conclusions and reporting

The Consultation Process Involve individuals and organisations with experience and expertise in brick and masonry arch bridges. Contribution of knowledge, user’s perspective, views on content and material for inclusion (e.g. case-studies). Consultation Workshop Consultation Workshop Questionnaires (available on CIRIA website) Questionnaires (available on CIRIA website) Ongoing consultation (RP692 Steering Group, correspondence and interviews with individuals) Ongoing consultation (RP692 Steering Group, correspondence and interviews with individuals)

Today - the Consultation Workshop  Your opportunity to contribute to the report  Aiming to explore relevant issues, discuss report content and define industry best-practice  Open-forum discussion based around topics:  Asset management  Bridge performance, appraisal and assessment  Maintenance and repair  The future of masonry and brick arch bridges

Asset Management  What are the performance requirements for masonry and brick arch bridges?  Are they likely to change in future?  How are masonry and brick arch bridge assets currently managed?  What are the main issues of concern for owners/managers of these structures?  What are the key issues to be dealt with in the report?  What guidance should be given as to best practice in asset management?

Condition Appraisal and Assessment  How is bridge condition currently appraised?  What are the requirements for routine and special investigations?  What are the causes of loss of performance and how can their effects be assessed?  What are the principal structural assessment methods?  What are the main considerations in their use?  What key issues should be considered in the report?  What guidance should be given as to best practice?

Maintenance and Repair  What are the principal factors in the selection and design of remedial works?  How can future maintenance requirements best be assessed?  Which strategies and techniques have proven effective, and which ineffective, in the past?  What key issues should be addressed in this report?  What guidance should be given as to best practice in this area?

The Future  What is the outlook for masonry and brick arch bridges in the future?  What areas would benefit from improved knowledge and experience?  Are there any promising new developments in the areas discussed?  What lessons have been learned from our experience with these structures to date?  How can we best ensure the long-term serviceability of these bridges as part of our transport infrastructure?

Producing the report: what happens now?  Ongoing consultation process  Issue and return of Questionnaires  Direct consultation via correspondence and/or interviews  All contributions gratefully received  Benefit of advice, knowledge, experience  Case-studies illustrating good or poor practice  Photographs, diagrams, illustrations

Closing Points  Thank you for your contribution today!  Please visit the CIRIA website and complete and return a Questionnaire  Any further contributions to the report, ideas or discussion of its content, should be directed to Leo McKibbins (Mott MacDonald)