outline definitions examples of landfills in the valley construction on landfills materials...
TRANSCRIPT
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OUTLINEOUTLINE
Definitions Examples of Landfills in the Valley Construction on Landfills Materials Placement in Landfills Developments on Landfills – why develop landfills ?? Concerns Associated with Development on Landfills Landfill Materials Investigation Remediation of Construction and Demolition (C&D) Landfills Example Projects
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DEFINITIONSDEFINITIONS
MSW Landfill C&D Materials Inert Debris Landfill
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EXAMPLES OF LANDFILLS IN THE VALLEYEXAMPLES OF LANDFILLS IN THE VALLEY
C&D Landfills– Mostly Along the Salt River, Aqua Fria, Gila River &
Santa Cruz River– Created Generally by Mining of Aggregates for Concrete,
Asphalt, and Base Course Materials– Pits Left Behind are Backfilled with MSW or C&D– 24th St Vulcan Materials, 28th St ( Dean Thomas
Property), Salt River Pima Maricopa Dobson Plant– Tempe Market Place
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EXAMPLES OF LANDFILLS IN THE VALLEYEXAMPLES OF LANDFILLS IN THE VALLEY
MSW Landfills– Queen Creek Landfill– 27th Ave Landfill– Tempe Municipal Landfill– Northwest Regional Landfill, and Others
Inert Debris Landfills– Salt River Materials Group Dobson Plant– 28th Street Landfill– 24th Street Landfill– Cotton Lane Landfill– Estrella Pit
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MATERILAS PLACEMENT IN LANDFILLSMATERILAS PLACEMENT IN LANDFILLS
No Compaction During C&D Disposals No Processing is Completed Creates Nesting of Large Particles Blind Spots around Odd Shaped Particles Organics MSW Decomposes, Develops Settlement, LFG &
Leachate
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MATERILAS PLACEMENT IN LANDFILLSMATERILAS PLACEMENT IN LANDFILLS
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DEVELOPMENTS ON THE LANDFILLSDEVELOPMENTS ON THE LANDFILLS
Install Recreational Facilities Low Load Bearing Structures on Compacted MSW,
e.g. Distribution Center Heavier Structures on MSW should be on Deep
Foundations Industrial and Commercial Developments on C&D
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CONCERNS ASSOCIATED WITH LANDFILL CONCERNS ASSOCIATED WITH LANDFILL MATERIALSMATERIALS
Large Settlement Uneven/Differential Settlements Unpredictable – No Model Available on Stability Compaction by Itself Biodegradation Piping, Internal Erosion and Raveling Gas (LFG) and Leachate Production, Accumulation
& Contamination of Air and Ground Water Organics in C&D Takes Too Long to Decompose
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LANDFILL MATERIAL INVESTIGATIONLANDFILL MATERIAL INVESTIGATION
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SOLUTIONS TO PROBLEMS FOR C&D SOLUTIONS TO PROBLEMS FOR C&D LANDFILLSLANDFILLS
Deep Dynamic Compaction (DDC) for Inert Debris Landfills
Compaction GroutVibrofloatation (Not Common)Remove and Reconstruct w/ Engineered
Fill/Debris
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Deep Dynamic
Compaction (DDC)
Tempe Market Place
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SOLUTIONS TO PROBLEMS FOR C&D SOLUTIONS TO PROBLEMS FOR C&D LANDFILLSLANDFILLS
Deep Dynamic Compaction (DDC):– Effective up to 30’-35’– 30-ton Load Drop from 80-90 feet Height, Multiple
Times– Imparts approx. 150 ton-ft/sq.ft. Equivalent to 150%
of Standard Proctor Compaction up to 25 Foot Depth– Evaluate Performance– Can’t Take Care of all Piping and Raveling
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40002000
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Deep Dynamic Compaction
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24th Street and Salt River– Vibration Monitoring
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Example Project, Load Test # 1ASTM D 1194-94
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0 50 100 150 200
Load , (Kips)
Ave
rag
e D
efo
rmat
ion
, (
inch
) .
Performance Evaluation with Plate Load Test
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SOLUTIONS TO PROBLEMS FOR C&DSOLUTIONS TO PROBLEMS FOR C&D
Debris Fill Specifications– Anything as long as Inert Debris– 2 to 3 feet Lift Thickness– Compaction with 10 to 15 ton Equipment– 3 to 4 Passes with 20 to 30 hertz vibration– 30 to 60 Gallons/Cu.Yd. Water
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Debris Fill Specifications
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EXAMPLE PROJECTSEXAMPLE PROJECTS
Tempe Market Place28th Street and Salt River24th Street and Salt River14th Street and River View Drive
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Tempe Market Place – Before Development
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Tempe Market Place – During Stabilization
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Tempe Market Place – After Development
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24th Street & Salt River
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CONCLUDING REMARKSCONCLUDING REMARKS
Environmental Benefits Aesthetic Improvement Monetary Value Added Land Use Positive Economic Impact Catalyst Stops Illegal Dumping