Stabilizing%20Slides%20%20Using%20a%20Spider%20Excavator

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Stabilizing Slides Using a Spider Excavator
Eric L Kay Rob Wilson
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Stabilizing Slides
Part 1 - Spider Excavator, (the tool) Part 2 -
Landslide Headscarps Part 3 - Multiflow
Drainpipe Part 4 - Contour Drainage
Eric
Eric
Rob
Rob
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Kaiser X5 M
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Part 1 - Spider Excavator Description
J
.. .
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Hydraulic thumb
Pushes and pulls itself around
Work on steep slopes 100 (One to One slope)
Extending stick
Twist wrist bucket
Walks on 4 legs
Hydraulic winch 12,000lbs
Rolls on two back wheels
Kaiser X5 M
Optional Hydrostatic drive (6kmph)
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Agility
Step over
- Logs
- Shrubs
- Small trees
Schaeff HS 40 D
- Boulders
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Safely work on a 1 to 1 slope
Kaiser X5 M
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Previously deactivated road system
site accessibility
Schaeff 41 M
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Perched material in the gully
Schaeff 41 M
Beyond the reach of a normal excavator
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The power of an excavator 1 1/2 times the size
Schaeff HS 40 D
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Schaeff HS 40 D
Working in water 2 meters deep
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Transportable by Helicopter For remote site work
Fueled and ready to work
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Part 2 - Landslide Headscarps
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• Retrogressive Failures
• Maintenance problems
• Destruction of remedial works
• Loss of productive land inventory

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Unstable headscarp
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Kaiser X5 M
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Large woody debris
Kaiser X5 M
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Caution ? ? ? ? ? Need good understanding of
soils, water and slope processes
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Part 3 - Multiflow Drainpipe
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Multiflow pipe Available in 15,30 46 cm widths
Made up of multiple miniature Big O pipes laid
flat, joined together and covered in a filter
fabric
A viable alternative for Drain rock
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Part 4 - Contour Drainage
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This site is located in the Cariboo Mountains
where a hanging glacial valley slopes into a
typical U shaped glacial valley.
Glacial fluvial out-wash deposits are buried
below glacial till, resulting in seepage related
slope instability problems.
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A road cut slide, with retrogression of the
headscarp and an ongoing maintenance problem.
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The Spider Excavator digs a trench above the
crest of the headscarp
The base of the trench should slope at least 2
towards an outlet end of the drainage.
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The multiflow drainage composite was put into the
bottom of the trench, against the uphill slope,
and a 6 mil polyethylene sheet against the down
slope side.
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The multiflow drainage composite was put into the
bottom of the trench, against the uphill slope,
and a 6 mil polyethylene sheet against the down
slope side.
Alternatively a composite Blanket Drain
material such as Nudrain DM50 could be employed
Excavator starts backfilling the trench. Woody
debris is then scattered over top
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Excavator starts backfilling the trench. Woody
debris is then scattered over top
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5 liters/min X 60 min/hr X 24 hrs day
7200 liters/day Thats over 7000 kg less weight
on a day to day basis! What difference does a
month or two make?
Steady seepage from subsurface drainage
collector (Multiflow)
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Finished swale above head scarp with debris
scattered over top. (Picture has been stretched
to emphasize the swale)
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Finished drainage swale directing surface run-off
along flank of slide area
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Stable cut slope with reduced seepage after
finishing the contour drainage work.
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Thank You
Eric Kay - Rob Wilson
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References Kaiser X5 M - JOHOE Inc Joe Gisler
250 398-3507 Schaeff HS 40 D - Nu Creek
Developments Len Masson 250 833-0173 Schaeff HS
41 M - J W Berry Trucking Brad Berry 250
724-4912 Rob Wilson - Weldwood - 250
392-7731 Eric L Kay - Kay Associates -
250 337-5096