Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

2005

No description
by

Roger Skirrow

on 23 January 2014

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of 2005

CN RAIL

HWY 744

HWY 2

HEART

RIVER

CN RAIL

HWY 744

RIVER

PEACE

1.0

0 km

0.5

HWY 744:04
JUDAH HILL ROAD

A GRAVEYARD OF SLIDE REPAIR SCHEMES

TECH TALK
January 23, 2014

ROGER SKIRROW
with acknowledgement
to Neil Kjelland, Ed Szmata &
James Morgan

IDEAL
WORLD

Welcome to Reality
Morpheus
Neo
Matrix
Complex geology
Remnant landslides
Severe topography
Realignment not possible
Precarious sidehill
Groundwater issues
Constraints of CNR/ATCO
MD / AT records
250 Friends of Judah Hill
CNR SLIDE

1983 - First slide issues surface
1984 - Timber Piles installed, road realigned
1986 - CNR constructs toe berm
1987 - Horizontal drains installed
1988 - Concrete pile wall installed
1989 - Gravel filled belled pile wall installed with pump, lightweight fill placed
2006 - Heart River removes lower third of berm. Continues to erode to this day
1986
2007
1988
FENCE SLIDE

1988 - First slide issues surface
1988 - Gravel/lime columns installed, fence installed to catch toppling material
1992 - Subsidence around columns fixed
1998 - Buried drain installed along upslope ditch
2004 - Columns again protruding through asphalt
2005 - Complete slope failure, material excavated and replaced with geogrid reinforced gravel fill
2010 - Cracks noted that extend to Trunk Slide area
1990
2008
1998
2005
2010
TRUNK SLIDE

1998 - First slide issues surface
1999 - Big "O" Drain installed
2004 - Ditch erosion repaired
2005 - Drain pulls apart at joints, water diverted
2010 - Cracks extending from Fence Slide reach Trunk Slide area

MAKEOUT SLIDE

Early 1990's - First slide issues surface, pile wall installed
2001 - Berm constructed to divert water, CL pipe installed
2005 - Complete slope failure, Bailey bridge installed to span slide area, road and pipeline realignment into hillside, geogrid reinforced toe berm constructed
2008 - Shallow failure on repaired slope below highway - monitored - extends into Michelin Slide North area
MICHELIN SLIDE (North)

1996 - First slide issues surface
1997 - Road realigned, pile wall installed
1999 - Slides occuring below wall
2005 - Minor slides fixed as part of Makeout Slide repair
2007 - Slides ongoing below pile wall

MICHELIN SLIDE (South)

1986 - First slide issues surface
1988 - Gravel and lime columns installed
1997 - Road realigned with north slide work
1998 - Large failure repaired with shear key, toe berm and lightweight shredded tire fill
2009 - Shallow surface slides and seepage
LOOKOUT SLIDE

1997 - First slide issues surface
2013 - Several steeply inclines shallow slides noted
HEART RIVER SLIDES

1997 - First slide issues surface - four slides identified failing into Heart River valley
1998 - Northernmost slide repaired using gravel fill and drainage
2005 - Three remaining areas grow in size every year
2008 - Pullout lane closed, guardrails moved (again)
2013/14 - Slide repairs in progress, dig and replace with geogrid reinforced fill
SUNSHINE SLIDE

2010 - First slide issues surface
2013 - Massive slide closes road
2013/14 - Slide repairs in progress, includes pile wall, lightweight fill (Geofoam)
COSTS (Adjusted to Current Year $)

CNR/Fence $2.2M
Trunk $0.2M
Makeout $5.1M
Michelin $4.6M
Lookout $0.2M
Heart River North $0.4M
Sunshine and Heart River $10.4M
Ongoing maintenance - patching / Geohazard assessments and instrumentation monitoring
$0.8M
Total = $23.9M
About $10M / km
PIPELINE SLIDE (NEW)

2010 - First slide issues surface
2010 - ATCO installs strain gauges along gas pipeline
2011 - ATCO realigns pipeline
2012 - Instruments show movement occuring in two directions - Heart River/Peace River, large open cracks along spine

2005
2012
2007
2000
2005
2009
2012
2011
2012
2005
2007
2013
2001
2007
2011
Weak clay, silt
Marine clay shale /
Sandstone
Sand, clay, pebbles
Soft Sediment Deformation
CNR
Fence
Trunk
Sunshine
Makeout
Pipeline
Michelin
Lookout
Heart
River
750 AADT
2 LANE PAVED
2.5 KM
Full transcript