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Deltalok BCOverview Jan 2010
 

Deltalok BCOverview Jan 2010

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Deltalok Ecological Engineered Geotechnical Solution - Overview

Deltalok Ecological Engineered Geotechnical Solution - Overview

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    Deltalok BCOverview Jan 2010 Deltalok BCOverview Jan 2010 Presentation Transcript

    • Welcome
    • The Big Picture
      • Urban Development
      • Climate Change
    • Urban Development
      • Reduction of buildable/useable land has lead to:
      • need to build up hillsides
      • increase in infrastructure (bridges, culverts)
      • higher density per sqm
      • Reduction of green space has lead to:
      • increase storm water runoff
      • increase in erosion
      • increase demand to creeks and ditches
    • Climate Change
      • violate storms
      • flooding
      • draught
      • eroding banks
      • slope failures
      • slides
    • Environmental Issues
      • Pollution – air, water, noise
      • Loss of natural areas
      • Lack of biodiversity
      • Site disturbance (large construction footprint)
      • Heat island effect
      • Construction waste material
      • Sedimentation
    • Rise of Environmental Approaches
      • Past guidelines based on structural concepts with marginal focus on the environment
      • Current guidelines more focused on preventative measures with environmental approach:
      • Green Building Code
      • Green Roads Rating System
      • Green Shorelines
      • LEED projects
      • EAA
      • DFO
      • BC Ministry of State of Climate Action
      • BC Climate Action Charter:local government to cut GHGE by 2012
      • BC Forestry Climate Change Working Group:carbon neutral by 2015
      • Kyoto Protocal (expires 2012)
      • World Wildlife Foundation states GHG must bereduced by 80% by 2050
      Governmental Environmental Mandates
    • Government Funding with Environmental Emphasis
      • Federal Gas Tax Fund
      • Federal Infrastructure Fund
      • Federation of Canadian Municipalities’ Green Fund
      • Provincial Cycling Infrastructure Partnership Program
      • Provincial LocalMotion Fund
      • Translink’s Bicycling Infrastructure Capital Cost Sharing Program Funding
      • Pacific Carbon Trust – mandate to qualify BC based activities with GHG offset
      • Carbon Credit – green technology or process that reduces GHG
      • Potential carbon-credit “Cap & Trade” market
    • The Need for Environmental Solutions
      Retaining Walls & Slopes
      Rock, wire mesh, concrete
      Green retaining walls & slopes
      Noise Attenuation
      Concrete, wood, steel
      Vegetated berm structure
      Shoreline Protection
      Rock, wire mesh, concrete
      Green shoreline
      Stream bank Stability
      Rock, wire mesh, concrete
      Bio-engineered system
    • Time for Change
    • Time for Change
      HARD
      (permanent engineered)
    • HARDSOFT
      (temporary vegetated)
      Time for Change
    • Deltalok’sStrength
      DELTALOK
      Soft
      Permanent
      Vegetated
      Engineered
      HARD
      SOFT
    • Deltalok System
      Deltalok GTX Bag
      • a proven material in the industry
      • provides a filtering functionality
      • water permeable & root friendly
      Deltalok Interlocking Unit
      • made of recycled polypropylene
      • consist of 11 spikes
      • provides the 3D interlocking strength
      • Deltalok combines engineering & science
      • Engineering = known methodologies, analysis, principles
      • Science = vegetation principles of water, light, nutrients & oxygen
      Deltalok’s Principles
      • Deltalok GTX Bag
      • Specially Selected GTX Material
      • Soils Engineering
      • Quality soils in the bag. Science!
      Deltalok’s Principles
      • Deltalok – Interlocking Unit
      • Structure Engineering
      Deltalok’s Principles
      • Engineered Drainage
      Deltalok’s Principles
      • Engineered flexibility
      • Effective in seismic and soft soils
      Deltalok’s Principles
      • Deltalok Engineering & Science
      Deltalok’s Principles
      • Shoreline, streambank, riverbank protection
      • Retaining Walls
      • Landscape Walls
      • Steepened Slopes
      • Culvert headwalls
      • Ditches
      • Noise walls
      • Flood control
      • Military applications
      Deltalok – Application examples
    • Potential LEED credits - 21 Credits
    • Potential LEED credits - 21 Credits
      • Independent GHG analysis performed
      • Measured emissions during:
      • Manufacturing of component
      • Manufacturing of system
      • Transportation
      • Construction
      • Maintenance
      • Concluded 97% reduction when compared to concrete
      Greenhouse Gas (GHG) Analysis
    • Deltalok Inc. Overview
      • Part of a group of companies established in 1980
      • Head office in North Vancouver, BC
      • Canadian invention
      • Patented in over 50 countries
      • Over 2M Deltalok sets installed worldwide
    • Canada
      USA
      Malaysia
      Korea
      Singapore
      UK
      New Zealand
      Australia
      China
      Columbia
      Hong Kong
      Netherland
      Iran
      Switzerland
      Italy
      Spain
      Deltalok Locations
    • 1 - Gravity Structures
      • Walls
      • Slopes
      2 - MSE Structures
      • Walls
      • Slopes
      3 - Surface Stability & Erosion Protection
      • Streams & shorelines
      • Ditches
      Engineering & Design Methodology
    • Principles of Soils
      • Soil structures require stable surface element to hold back & filter soils
      • Soils natural angle of repose is 30 to 40 degrees (15degrees in water)
      • Soils have good compressive capabilities
      • Soils have low tensile capabilities
    • Designing Earth Structures
      Slopes: 45 to 70 degrees
      Walls: 71 to 90 degrees
      MSE Walls: Reinforcing material adds tensile strength to the soils
      slope
      wall
    • 1 - Gravity Structures
      • Wall mass supports existing earth & hydrostatic pressures behind the wall
      • Designed for no live or surcharge loading
      • Maximum height above
      ground usually up to 1.2m
      • Deltalok ‘Tie Back’ design allows for taller walls – up to 2m
    • Designing Earth Structures
      • Deltalok creates small lifts of soil confined within geosynthetic layers
      • Deltalok offers double layer of geosynthetic every 150mm
    • Designed Factors of Safety
      • Retaining Walls (71 deg to 90 deg):
      Internal StabilityMinimum Factor of Safety
      • Pullout (Peak) 1.5
      • Facing Shear (Peak/serviceability) 1.5
      • Facing Connection (Peak/serviceability) 1.5
      • Uncertainties 1.5
      External Stability
      • Base Sliding (static) 1.5
      • Overturning 2.0
      • Bearing 2.0
      • Global 1.3
      • Over-steepened Slopes ( < 71 deg):
       
      External Stability and settlement
      • Sliding 1.3
      • Deep seated (overall stability) 1.3
      • Local bearing failure (lateral squeeze) 1.3
      • Dynamic loading 1.1
      Settlement-post construction magnitude and time rate based on project requirements
      • Compound failure: 1.3
      • Internal slope stability 1.3
    • Example – Gravity Structure
      Site Parameters:
      • Ongoing erosion affecting cart path
      • Height of bank - 2m
      • Slope angle 1H:2V (65 degrees)
      • Must meet environmental mandates
      • Must be aesthetically pleasing
      • Biodegradable system
      • Too steep
      • Does not provide instant protection - dependent on root system
      • Gabions
      • Require additional excavation
      • Does not blend with nature
      • Concrete Modular Block
      • Footings required – too invasive
      • Not accepted close to stream
      • Does not blend with nature
      Gravity Structure - Design Options
    • Environmental Solution - Deltalok“Tie Back” Design
    • Environmental Solution - Deltalok“Tie Back” Design
    • Engineering Design – 2m high
    • Global Stability Analysis – 2m high
      Good design, FS &gt; 1.2
    • Environmental Solution - Deltalok
      • Provided instant erosion protection
      • Easy to install within wetted area
      • Provided filtration & sedimentation control
      • Approval by all governing bodies
      • Quick installation - outside wetted perimeter
      • Minimum site disturbance
      • Provided fish friendly solution
      • Successful re-vegetation with hydroseeding & live stacking
      • Photo taken 2yr after installation
      Environmental Solution - Deltalok
    • 2 - MSE Structure
      DeltalokEcology Bags &
      Interlocking Connector maintain
      facial stability
      geogrids resist external force
      failure mechanisms
      DeltalokInterlocking Connectors attach geogrids to Ecology Bags and
      provides shear strength
      NCMA Suggestion: L &gt; 0.6H
      DOT Suggestion: L &gt; 0.7H
    • Example – MSE Structure
      Site Parameters:
      • Golden Ears Bridge 5m high on/off ramp
      • P3 project required to integrate environmental solutions
      • Golf course across the ramp demanded design with minimum visual impact
      • Need for competitive solution
      • MSE Concrete Modular Block
      • Does not meet aesthetic requirements
      • Does not meet with environmental requirements
      • MSE wire structure
      • Does not meet aesthetic requirements
      • Does not meet with environmental requirements
      MSE Structure - Design Options
    • Environmental Solution – DeltalokMSE design
    • Engineering Design – 5m high
    • Global Stability Analysis – 5m high
      Design is good, FS &gt; 1.25
    • Environmental Solution - Deltalok
      • Deltalok accommodated 4 integrated curvatures
      • MSE design included high density polystyrene blocks to reduce load
      • Deltalok will adapt to anticipated settlements
    • Environmental Solution - Deltalok
      • Deltalok design supported government mandate for environmental solution
      • Vegetated with zero maintenance ground cover
      • Additional benefits are heat reduction, noise absorption & anti-graffiti
    • 3 - Surface Stability & Erosion Protection
    • 3 - Surface Stability & Erosion Protection
      • Continuous erosion leads to:
      • Steepened slopes
      • Soils void of nutrients
      • Loss of vegetation
      • Potential slope failure
      • Sediments in the water
      • Lack of canopy over water for shade
      • Loss of private or public property
    • Example - Slope Stability & Erosion
      Site Parameters:
      • Height of slope - 9m
      • Slope angle 1H:1V (45 degrees)
      • Sandy Soil
      • Difficult to access
      • House above, lake below
      • Erosion Mats
      • Too steep - 2V:1H (27 degrees) suggested maximum
      • Does not provide instant protection - dependent on root system
      • Gabions
      • Hard to install without equipment
      • Require additional excavation
      • Does not blend with nature
      • Stepped Walls
      • Hard to install without equipment
      • Does not blend with nature
      Engineering Design Options
    • Environmental Solution - Deltalok“Tie Back” Design
      • Provides instant erosion protection
      • Easy to install
      • Mimics existing topography
      • Provides filtration & sedimentation
      Environmental Solution - Deltalok
      • Approval by all governing bodies
      • Accommodated existing terrain
      • Overall install cost less then budgeted
      • Successful re-vegetation using Native bluegrass, fescue & rye grass seed mix
      • Photo taken 5 yr after installation
      Environmental Solution - Deltalok
    • Example - Slope Stability & Erosion
      Site Parameters:
      • Continuous erosion along stream
      • Undermining of path above
      • Difficult site access
      • Must meet government environmental mandate
    • Eroded Section of the Stream
      Stream away from erosion
      Stream at most
      erosion
    • Environmental Solution - Deltalok
      • Embedment for toe protection
      • Eco Rap revetment to protect from scour.
    • Slope Stability Analysis
    • Example - Eroding Trail
      Site Parameters:
      • Eroded slopes above and below trail
      • Require minimum site disturbance
      • Difficult to access site
      • Need to re-vegetated with native plants
      • Minimum closure time
      since popular public path
      • Gabions
      • Hard to install without equipment
      • Challenging to vegetate
      • Does not conform to existing topography
      • Concrete Modular Blocks
      • Require additional excavation
      • Require leveling pad & steps
      • Traditional drainage system required
      • Does not conform to existing topography – linear look
      • Does not blend with nature
      Engineering Design Options
    • Environmental Solution – DeltalokTie Back & Geogrid Design
    • Environmental Solution - Deltalok
      • Required drainage provided via gravel filled Deltalok bags
      • Easy to install
      • Minimum excavation required
      • Designed for emergency vehicle
    • Easy for Contractors
      • Flexible system
      • No leveling pad (150mm typ.)
      • No gravel drain layer required (300mm)
      • No shimming of units for level
      Hard solutions require leveling pads, steps … make the environment fit the solutions
      Deltalok Fits the situation
    • Environmental Solution - Deltalok
      • City’s Parks & Environment Departments approval
      • Re-vegetation using native ferns & shrubs that require minimum sunlight
      • Conformed to existing contours
      • Sustainable solution that blends with nature
      • Photo taken 4mths after installation
    • Erosion - Infrastructure
      Mother Nature is trying to establish a stable slope: 4H : 1V
    • Engineering Design Options
      Road
      Nature’s natural slope
      Road
      Reinforced Concrete Channel
      Gabions
    • Environmental Solution - Deltalok
      Two man days with City work crews.
      Re-established astable 1H:1V slope
      Provides a non-erodible surface
      When vegetated, provides a solution that matches the environment
    • Coffee Break
      • Air
      • Water
      • Oxygen
      • Nutrients
      • Quality soil
      • Site exposure
      • Select vegetation based on exposure
      Vegetation Fundamentals
    • Deltalok Vegetation -Why it greens
      • Permanently confines high quality soils
      • Eco-pockets every 0.15m vertically & 0.6m horizontally
      • Consistent growing medium to 100% of the face
    • Hydroseeding
      • Best Practice
      • Most common, cost effective & fastest growth
      • Saturate Deltalok bags first
      • Apply hydroseed mulch - ‘bonded fiber matrix’ suggested
      • Common Applications
      • All applications
      • Except those affected by changing water levels
    • Vegetation Option: Hydroseeding
    • Live Planting
      • Best Practice
      • Root balls can be placed between the bags or cut into the bag
      • Can be placed during or after installation
      • Make root ball in a cone shape with fertilizer pellet placed inside
      • Wet root ball prior to placement
      • Recommend 30% to 50% more plants then designing for horizontal area
      • Common Applications
      • Landscape walls & slopes
      • Restoration or reintroduction of native plant species
    • Vegetation Option:Live Planting into Deltalok bags
    • Vegetation Option –Live Planting between Deltalok bags
    • Live Staking
      • Best Practice
      • Often used in combination with hydroseeding
      • Can be placed during or after installation
      • Do not puncture bags below high water mark
      • Common Applications
      • Most often used for shorelines & stream banks
      • When aesthetic outcome is for naturalized rugged look
    • Vegetation Option – Live Staking
    • Brush Layering
      • Best Practice
      • Similar to live staking but placed between the Deltalok bags
      • Placed during installation
      • Saturate backfill and bags thoroughly if dry
      • Common Applications
      • Used for shorelines & stream banks
    • Vegetation Option – Brush Layering
    • Pre-seeding Deltalok bags
      • Best Practice
      • Mix seeds with bag filling growing medium
      • Outcome variable – increase seed quantity
      • Saturate bags thoroughly after pre-seeding
      • Often combined with brush layering or live staking
      • Common Applications
      • Land/water applications where water could wash away seeds on the surface
      • Remote areas
      • Sites where wildlife could eat seeds on the surface
    • Vegetation Option: pre-seeding Deltalok GTX bags
    • Construction Fundamentals
      • Deltalok Bag Filling
      • Deltalok Bag Placement
      • Deltalok Interlocking Unit Placement
      • Backfill Placement and Compaction
      • Geogrid Placement, if required
    • Bag filling
    • Bag filling
    • TAMP DOWN
      TAMP DOWN
      Bag
      Bag
      Bag
      Bag
      Bag
      Bag
      Bag
      Bag
      Bag
      Bag
      Bag
      Bag
      Interlock Deltalok GTX Bags
      How to Build a Deltalok Self Standing Wall
      Place the first row of Deltalok GTX Bags
      Place Deltalok Standard Units
      Continue building…
    • Installation – gravity & MSE walls
    • Deltalok’s Constructability
    • Deltalok’s Constructability
    • Deltalok’s Constructability
    • Case Study #1 – Landscape WallsWest Vancouver, BC – British Properties
      Situation:
      • Site located on steep slope where most of the trees have been removed
      • Objective to create a non-linear, less stark look
      • Desire to exceed District of West Vancouver’s ‘Green Infrastructure’ initiative
    • Solution:
      • Use Deltalok to provide a softer appearance
      • Ability to build walls with curvatures both horizontally and vertically
      • Create a unique look
      • Increased amount of vegetation – heather, kinnikinnick, roses
      Case Study #1 – Landscape WallsWest Vancouver, BC – British Properties Built September 2009 – landscaping still incomplete
    • Situation:
      • Ongoing wave erosion along Provincial Marine Park shoreline
      • Parkland, trees & First Nations artifacts effected
      • Boat access only
      • Shoreline consist of flat-lying sandstone bedrock
      • Permanent environmental solution required
      Case Study #2 – Shoreline ProtectionNewcastle Island, BC - across from Nanaimo
    • Solution:
      • Anchoring Deltalok to sandstone using ‘wrap & lock’ methodology
      • Deltalok bags were pre-seeded with select seed mix
      • Additional live planting
      • Over $200,000 saved compared to traditional ‘hard’ solution
      Case Study #2 – Shoreline ProtectionNewcastle Island, BC - across from NanaimoBuilt December 2008
    • Situation:
      • Reduce trucking travel time between gravel pit and highway
      • Road located through wetland
      • Need for quick construction to minimize road closure
      • Need to meet environmental & transportation requirements
      Case Study #3 – Culvert HeadwallsAbbotsford, BC – Valley Gravel Inc.
    • Case Study #3 – Culvert HeadwallsAbbotsford, BC – Valley Gravel Inc.Built October 2006
      Solution:
      • Build 4.5 m high Deltalok culvert headwall
      • With no traditional footings, cutting or drainage, Deltalok System was quickly installed
      • Deltalok’s DFO’s acceptance, quickened building permit process
      • Hydroseeded retaining wall
      • Photo taken 3yrs after construction
    • Situation:
      • Construct 10km bike path along existing road
      • Road adjacent to environmentally sensitive area
      • Minimize construction footprint
      • Desire to blend with nature
      Case Study #4 – Road WideningAbbotsford, BC – Downs Road bicycle path
    • Case Study #4 – Road WideningAbbotsford, BC – Downs Road bicycle pathPartly built July 2008 – completion spring 2010
      Solution:
      • Deltalok used to steepen road embankment eliminating need to expropriate additional land
      • Provided quick construction with minimum traffic delays
      • Accommodated existing undulations – blended with surroundings
      • Aesthetically pleasing
    • Situation:
      • Developer desired to obtain Gold LEED designation
      • Client wanted green wall system beside detention pond
      • Requirement to mimic surrounding vegetation
      Case Study #5 – Near Vertical WallsBurnaby, BC – Electronic Arts Head Office
    • Solution:
      • Build a Deltalok near vertical MSE wall
      • Used live willow stacking and hydroseeding
      • Successful vegetation 5 yrs after installation
      Case Study #5 – Near Vertical WallsBurnaby, BC – Electronic Arts Head OfficeBuilt December 2005
    • Deltalok’s Support
      • Initial site visit
      • Customized design ideas
      • Sample CADD drawings & specifications
      • Engineering support
      • On site training
    • Deltalok’s Various Strengths
      • Flexibility Strength – adapts to grade changes, low bearing soils, differential settlement
      • Constructability Strength – full face drainage, no footings, buildable in difficult to access sites
      • Growing Strength – root development through bags
      • Immediate Structural Strength – 3D interlocking strength
      • Reinforced Strength – interlocking geogrid for MSE walls
      • Permanent Strength – resistant to degradation, soil chemicals, rodents, insects, non-biodegradable
      • Environmental Strength – DFO accepted, GHGE, noise & heat reduction, sedimentation & filtration ability
      • Aesthetic Strength – restores nature’s beauty
    • What’s Stronger?
    • Thank You for Coming…..
      Let’s Build it Green Together