Apresentação realizada na feira RWM Brasil, 2013

1. Enabling works at the Olympic Park:
Effectively delivering the preparation of
the construction site for the London 2012
games
Dr Jan Hellings
Dr Jan Hellings & Associates Ltd
Formerly Project Sponsor Olympic Delivery Authority
London
October 1st 2013

2. SUMMARY OF PRESENTATION
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Taking possession of the Olympic Park site
Site investigation
Ground/water considerations
Clean-up (Remediation) process
Typical contaminants
Treatment options
Materials movement & management
Photos
Lessons learned
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3. LOCATION OF 2012 OLYMPIC VENUES
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4. OLYMPIC PARK SITE - BEFORE
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5. TAKING POSSESSION OF THE OLYMPIC PARK SITE
• The assembly of a 250 hectare site is one of largest
Compulsory Purchase Orders to have taken place in the UK.
• 2,200 land ownerships to acquire
• Approximately 200 businesses relocated
• 98% of the 4,750 jobs secured
• Over 140,000 square metres of development space,
including three new LDA business parks constructed in
areas adjacent to the Park
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6. PLANNING PERMISSIONS
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7. SITE PLAN
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8. Site Investigation Statistics
No. of Intrusions
Total metres sampled
and tested
Geotech and contam
boreholes
880
30,800
Contam specific
boreholes
390
5,850
Window samples
(contam specific)
930
5,580
Trial pits (geotech
and contam)
600
2,400
2,800
44,630
TOTALS
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9. Plan of Olympic Park
Site Investigation
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10. Site Preparation Life Cycle
Global Remediation Strategy
Approvals
Site Specific Remediation Strategy
Vacant
Possession
Site Investigation
River Walls
Utility inputs
Invasive Species
Construction Roads and
Bridges (abutments)
Demolition
Remediation Method Statements (RMS)
Target
= 95%
re-use
Remediation
Bulk Earthworks
Mechanical Separation
Soil Washing
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Bioremediation
Stabilisation
Target
= 85%
re-use
Handover to
Venue Contractor

11. Conceptual Site Model – Risk Driven Remediation
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13. Treatment Methods
Soil Washing North Plant (100 tph) CZ 5b;
looking east the fine sands hydraulic separation
and output conveyor in foreground
Soil Washing Sout); looking at sludge
(fines at 15 tph *2) dewatering filter press
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Soil Washing North Plant (100 tph) CZ 5b;
looking north to fines separation and beyond to
Coarse fraction washing.
Soil Washing South (75 tph *3); looking north
towards the two soil washing plants in cZ4.
Note washed gravel output in left foreground

14. Treatment Methods
Mobile Soil Stabilisation Plant set up for
Treatment Trials (45t/hr) prior to Main
Equipment being Mobilised
Bioremediation Pile Cells Aeration, Leachate and irrigation
pipe systems being established beneath bio-piles
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Aerial view of site prior to start of projectfiled prior to
Bioremediation Pile Cells being
Soil Stabilisation Plant in South
Treatment Centre (60t/hr)
Aeration, Leachate and irrigation systems being
established, pipe work still to be connected

15. Treatment Methods
Complex Screening Plant setup in North
of the Park
In-situ Soil Mixer utilising Cement and/or lime to
allow geotechnical soil parameter improvement
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Unsorted Landfill Materials at Complex
Screening Plant

16. Treatment Centre Locations
• Two treatment centres
established – one in the north
and one in the south
• Each treatment centre has
several treatment processes
available
• Flexibility of approach and
competition between treatment
methods is encouraged
• Five soil washing plants at
site.
• Soil stabilisation
• Bioremediation cell pads
constructed
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17. • Materials Total approximately (2.5 Million m3)
• Demolition (500,000m3)
• Excavated Soil
(1.8 Million m3 cut of which 820,000m3 treated )
• Tunnelling soil (approximately 200,000m3)
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• Beneficial and optimal reuse strategies
• General fill (approximately 50% untreated)
• Separation layer (approximately 50%)
•Base coarse and sub-base
•Selected engineering fill
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18. Materials Balance – Enabling Works
Washed
Gravels
Sludge
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Washed
Sands
Waste

19. Demolition of Tower
Blocks on CZ6b, Clays
Lane
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20. Demolition of warehouse/office building
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21. Oblique photo looking North
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22. STADIUM SITE MID 2007
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23. OLYMPIC PARK LOOKING NORTH – JULY 2008
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24. OLYMPIC PARK LOOKING NORTH – AUGUST 2008
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25. OLYMPIC PARK LOOKING NORTH – NOVEMBER 2008
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26. OLYMPIC PARK LOOKING NORTH – MID 2009
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27. PARK VIEW LOOKING SOUTH – MID 2008
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28. PARK VIEW LOOKING SOUTH – November 2008
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29. PARK VIEW LOOKING SOUTH – MID 2009
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30. AQUATICS SITE – MID 2008
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31. AQUATICS SITE – MID 2009
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32. AQUATICS ROOF – NOV 2009
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33. LOOKING SOUTH – DEC 2011
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34. PARK – GAMES MODE
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35. AQUATICS COMPLEX
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36. VILLAGE - LEGACY
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37. MAIN STADIUM
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38. THE QUEEN LEAVES BUCKINGHAM PALACE WITH
JAMES BOND FOR THE OPENING CEREMONY
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39. THE QUEEN PARACHUTES INTO THE STADUIM –
OPENING CEREMONY
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40. OPENING CEREMONY

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42. THE LEGACY FRAMEWORK FOR THE PARK
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110 ha open space
Development platforms
comprising > circa 950,000 sqm
development
4,000 new housing units within
the village (> 9,000 overall)
Major investments in waterways,
rims, park edges
Venues transformed for legacy
Provides strong basis for further
development

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44. CLOSURE
The 2012 London Olympic and Paralympic Games
were a great success. We engineers can do the
‘impossible’!
Muito obrigado
jan@janhellings.com
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