1 LANDFILL MANAGEMENT اﻠﺼﻠﺒﺔ اﻠﻤﺨﻠﻔﺎت ﻤﺮ ﻤطﺎ إﺪاﺮةSite Investigation and Landfill Construction I Gernot Döberl Vienna University of Technology Institute for Water Quality, Resources and Waste Management اﻠﺼﻠﺒﺔ اﻠﻤﺨﻠﻔﺎت ﻤﺮ ﻤطﺎ إﺪاﺮةLANDFILL MANAGEMENT Gernot Döberl, Vienna University of Technology Contents Testing the hydraulic conductivity with stand-pipes Construction of the leachate collection system Compaction of a mineral base liner Site Investigation Base Liners Base Drainage Covers & Geotechnics Different covers at Breitenau experimental landfill in Austria
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Doeberl Site Investigation and Landfill Construction I · Site Investigation Methods Geological mapping, core drillings, trial pits, geotechnical field and lab experiments • Strata
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LANDFILL MANAGEMENT إدارة مطا مر المخلفات الصلبة
Site Investigation and Landfill Construction I
Gernot DöberlVienna University of TechnologyInstitute for Water Quality, Resources and Waste Management
LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology
Contents
Testing the hydraulicconductivity withstand-pipes
Construction of the leachate collectionsystem
Compaction of a mineral base liner
Site Investigation Base Liners Base Drainage Covers & Geotechnics
Different covers at Breitenauexperimental landfill in Austria
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LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology
One Landill – Three Barriers
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Groundwater
Site – natural („geological“) barrier
Waste as a barrier(waste treatment)
Liner – technical barrier
Brunner (1993)
LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology
Geological Barrier
Thickness of barrier
5 m, if hydraulic conductivity after DARCY k < 1.0 E-07 m/s or3 m, if hydraulic conductivity after DARCY k < 1.0 E-08 m/s
LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology
Site Investigation
Load-plate test
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LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology
Site Investigation
Stand-pipe test
LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology
Base Liners – Austrian Landfill Ordinance
Landfills fordemolition & construction waste
Landfills for• MSW• Residues from incineration• Residues from MBT
20-27 cm
20-27 cm
50 c
m
75 c
m
20-27 cm
20-27 cm
20-27 cm
HDPE (2.5 mm)
„Geological barrier“
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LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology
Construction of Mineral Base Liners
• Natural silt/clay or silty sand/gravel with bentonite• mixed-in-place or mixed-in-plant with rotary hoes• Water content (w95 on wet branch of Proctor-graph)• Layers of 35-40 cm• Compaction with drum rolers
• “Test field” to optimize working procedure
LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology
Construction of Mineral Base Liners
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LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology
Construction of Mineral Base Liners
LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology
Base Liners – Geomembranes
• High-Density-Polyethylene (HDPE, PE-HD)
• 2.5 mm thick• Chemical resistance (acidic and alkaline conditions, organic solvents,
Evapotranspiration layers• Combination of substrate and vegetation• Minimisation of water ingress by maximisation of evapotranspiration• Water from precipitation out of vegetation season is stored in pores of substrate• Restriction in areas with humid/alpine climate
LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology
Landfill Covers
50 cm compensation layer (shredded waste)
non-woven geotextile
Waste
150 cm water storage layer (graded grain-sizes)
50 cm infiltration layer (soil + vegetation)
tota
l thi
ckne
ss:
2 m
Evapotranspiration Cover (example)
coarse
fine
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LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology
Geotechnical Properties of MSW
Main failure mechanisms
LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology
Geotechnical Properties of MSW
0
100
9080706050
4030
2010
Mes
h m
inus
[%]
0.01 0.10 1 10 100
Grain size [mm]10000.001
Silt Sand Gravel StonesClay
MSW 15 years old
MSW fresh
MSW fresh
Turczinski (1988)
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LANDFILL MANAGEMENTGernot Döberl, Viennaإدارة مطا مر المخلفات الصلبة University of Technology