innovation from disaster - fig
TRANSCRIPT
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Christchurch EarthquakesSept 2010, Feb-Jun-Dec 2011, Present
Maurice PerwickRP Surv – NZIS
Accred Hydro Level 1
www.eliotsinclair.co.nz
Innovation from Disaster
Presented at th
e FIG W
orking Week 2016,
May 2-6, 2
016 in Christchurch, N
ew Zealand
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CHRISTCHURCH,BANKS PENINSULA , LYTTELTON HARBOUR, WAIMAKARIRI DIST..
SITE CALIBRATION – COMBINED GEOID
MODEL & INCLINED PLANE
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Global Approach
Modern Techniques & Equipment
Use of Geoid –Spheroid Correction
Models
National Geodetic datum & CORS
Stable and Reliable Ground
Monumentation
Archiving & Access to Data
Baseline & As-Built Surveys
Best Survey Practise
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Christchurch
Area: Total 1,426 km2 (550.6 sq mi) [Urban 452 km2 (174.5 sq mi)]
Population: 390,000
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4 September 2010 Earthquake
Greendale Fault
● Minor liquefaction to CBD
● Parapet damage
● Exceeded SLS event
Fault Line
● Structural damage largely confined to unreinforced brick masonry buildings
●
● Extensive liquefaction across eastern suburbs, Kaiapoi, Halswell, and Tai Tapu
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Christchurch Earthquake - Liquefaction
Land Failure !!
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Flooding & Subsidence from
liquifaction everytime a big shake
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Vectors - Displacements
Lyttelton Port
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Eliot Sinclair and Partners Ltd – Christchurch NZ
Intense monitoring of Tank Farm & Wharf
Differential
settlement
Tilting
High manifold
pressures
Rock column
failure
Stress on
Pipework / flanges
Load Bearing
Reduced
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Eliot Sinclair and Partners Ltd – Christchurch NZ
Tank Settlements
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Christchurch Earthquake22-Feb-2011 12:51pm
Images and data sourced from:
LINZ, GNS, USGS, WIKI, many Private Photo Albums, WWW public forums
The Second One !
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HomeWork
2.2g Vt
1.88g
Peak Ground Acceleration
20 Minute Journey- 3 Hours !
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My way home – impassible – huge detours !
Bridges Closed or Dislocated from Carriageway
0.3m – 1.5m Vertically
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Horizontal InfrastructureSurface and
Underground services
failed
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Home Sweet Home
Everything Trashed !
No telephone ( 14 days) TXT &
Car Charger only
No Power (10 days )
No Fridge / Freezer
No local shops & super Market
No rubbish Collection
No Water ( six weeks )
No Sewer ( one month, spa water
to flush)
No washing (body & clothes)
Rain Water captured- Boiled
Spa water – body wash
Gas BBQ & Hob
Bottled water
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Marine Embankments Failed
Cashin Quay Breakwater
Lyttelton Port of Christchurch
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Land interfaces collapsed towards
the deeper water
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Lateral forces from the hardstand push
the decking seaward
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Oil Wharf - Lyttelton
Note how the
shore has migrated
seaward and
settled behind the
wharf
Wharf becomes
deformed !
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Gear Recovery – Day 3 (25/2/2011)
Burglar (level 5)
Crossed Army Cordon
Braved darkness & Quakes
GPS, Levels, Total Stations
Data recorders, Laptops
Dismantle our CORS
Grab our Server
Pluck our Plotters
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‘Our Office’
Bob’s garage (North West Christchurch)
Laptops / internet
Governance by
Remote control
wearysome
Field gear allocated to vehicles
to limit travel ( fuel rationed)
Permits sought to access city /
port
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Total Deformation Contours – 22 Feb 2011
Our surveys confirmed the modelling outcomes
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Coal berth reconstruction & loading ships
Winching along berth and turning with tugs
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Bush Carpenrty
at its Finest
Windy Point Monitoring station -
Lyttelton
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Reconstruction Monitoring
Cashin Quay
Daylight surveys
15 Minute Cycle
Real-time Reporting
Crucial during Construction
Remote & stable Reference Marks
Hierarchy of Offset lines
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No. 7 Wharf- Seismic Isolation Joint
Provided RORO functionality
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Tracked 360 prism
on staff for bottom
Sewage treatment Plant
Liquifaction (shallowing)
Raw Sewage into Ponds
(Loss of Volume)
Clarifiers suffered mechanical
failure and uplift
Profiles & contours showed
differences
RTK GNSS
& 500KHz
for sludge
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Other Tasks
Golf Resort
Ocean Outfall
Inspections
Side Scan
Mapping - 3D
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Redcliffs Seawall collapse
500 KHz E/S Bow mounted
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Acknowledgements
Fellow staff at Eliot Sinclair
Sam Cech - Surveyor & IT (Tatras Consulting Ltd)
Warren Haynes - Senior Surveyor
John Aramowicz – Geotech Engineer
Others
Neil Mclennan – Lyttelton Port of Christchurch
Local Internet sites reporting earthquake events
EQC, EQR, GNS,LINZ,T&T
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Preparedness is the Key
But Nothing can Prepare you !
Share the resources and knowledge !
Use Imagination and be Brave !
Infrastructure Dies
Telephone-internet- communications
Power Reticulation
Water supply
Sewage
Stormwater drainage (flooding)
Traffic Management (traffic Lights)
Roading Network – essential services
Bureaucracy goes crazy !! Permits !!!
Conclusion
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Dangerous goods route to port
blocked for foreseeable future
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Masonary cladding, Tile roof, unsupported
ground slopes
Munted !
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Rescuers really did risk their lives
with ongoing shocks at PGG
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Pick up sticks !
Will it fall down?
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Fire danger !
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Triage in local parks
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Walking home thru the rubble !
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CDB
Destroyed !
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Suburban perils
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Eliot Sinclair and Partners Ltd – Christchurch NZ
Dust & liquifaction
Buildings & facards collapsed
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Transport routes
severely affected
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Eastern suburbs are flooded after Christchurch, New Zealand, was
hit by a 6.3 magnitude earthquake.
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Eliot Sinclair and Partners Ltd – Christchurch NZ