sustainable infrastructure december 2008. sustainable infrastructure… “sustainability of...
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SUSTAINABLE INFRASTRUCTURE
December 2008
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Sustainable Infrastructure…
“Sustainability of Infrastructure is about correct design (including cost recovery &
affordability) and maintenance over the life of the infrastructure”
Consideration Given To:RoadsSewage Network and TreatmentWater Purification and NetworkStorm WaterElectrical Reticulation
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Roads…
Road design is based on geometrical and pavement designGeometrical design is set for the lifetime of the roadPavement design incorporates certain maintenance actions along the life of the road structureFor pavement design roads are divided into four categories:
Category (A)- Road Class 1,2 – Freeway & Major ArterialCategory (B)- Road Class 3,4 – Minor arterials and collectorsCategory (C)- Road Calls 5(a), 5(b) – Residential access collectors and car parksCategory (D) – Road Class 5(b), 5(f)- Local access roads, loops, cul-de-sac etc
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Roads…
Category A Maintenance:Lower capital cost with structural design for 20 years
Resurfacing at 12 years
Structural rehabilitation at 20 years
Resurfacing at 26 years
Higher capital cost with structural design for 30 years
Resurfacing at 8, 16, 23 years
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Roads…
Category B Maintenance:Structural design for 20 years
Resurfacing at 12 yearsStructural rehabilitation at 20 yearsResurfacing at 26 years
Category C MaintenanceStructural design for 20 years
Resurfacing with overlay 10 years and patch repair as and when required
Category DResurface and patch repair 12 years
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Sewage Network and Treatment
Sewage TreatmentDesign is based on per capita usageDesign should be modularDesign treatment works for regular maintenance of plant without have to shut plant downMaintenance schedules should be documented (e.g. daily maintenance, monthly, annual etc)Maintenance staff should be well trainedFull compliment of maintenance staff required (electrical, fitters, welders, foreman etc)Fully stocked maintenance store required
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Sewage Network and Treatment
Sewage NetworkDesign is based on per capita usage
Network should be designed for ease of access
Maintenance schedules should be documented (e.g. daily maintenance, monthly, annual etc)
Maintenance staff should be well trained
Full compliment of maintenance staff required (electrical, fitters, welders, foreman etc)
Fully stocked maintenance store required
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Water Reticulation and Purification
ReticulationWater a scarce commodityNeed for meters to measure consumption and leakageWater reticulation is pressurizedMaintenance of network to minimize leaks,Maintenance of pressure valves etcMaintenance schedules should be documented (e.g. daily maintenance, monthly, annual etc)Maintenance staff should be well trainedFull compliment of maintenance staff required (electrical, fitters, welders, foreman etc)Fully stocked maintenance store required
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Water Reticulation and Purification
PurificationPurification plants designed per capita demand
Maintenance schedules should be documented (e.g. daily maintenance, monthly, annual etc)
Maintenance staff should be well trained
Full compliment of maintenance staff required (electrical, fitters, welders, foreman etc)
Fully stocked maintenance store required
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Storm Water Drainage
Design influenced by catchment factors, slope runoff surface, predicted storm size and frequencyMaintenance often over looked however schedules should be documented (e.g. daily maintenance, monthly, annual etc)Maintenance staff should be well trainedFull compliment of maintenance staff required (electrical, fitters, welders, foreman etc)
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Electrical Reticulation
Maintenance schedules should be documented (e.g. daily maintenance, monthly, annual etc)Replacement of cables, transformers and switchgear required and frequency needs to be determinedMaintenance staff should be well trainedFull compliment of maintenance staff required (electrical, fitters, welders, foreman etc)
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Maintenance Planning
All services require maintenance plans that detail:
Item to be maintained
Frequency of maintenance
Shut down/isolation procedures
Stock required in stores
Communication with stakeholders
Staff compliment and plant required
Authorization sequence
Cost of maintenance program for each item
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Maintenance Planning Required for New Infrastructure
Investment
Rail
Fre
ight
Serv
ices
Energ
y
Pro
duction
National R
oads
Com
mute
r R
ail
Serv
ices
Airport
s
2010 W
orld C
up
Sta
dia
Tra
nsport
Support
ing
Infr
astr
uctu
re
Oth
er
Tota
l
%
%
Infrastructure Spend 2006-2010: R 420 billion
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Maintenance Planning Required for New Infrastructure Investment Including Peter
Mokaba Stadium