Upload
donhan
View
236
Download
2
Embed Size (px)
Citation preview
ISWA Main Sponsors:
CONSTRUCTION OF A SANITARY LANDFILL
Landfill Training Workshop 7th September 2015
PRESENTATION*OUTLINE*
! CONSTRUCTION)OF)KEY)COMPONENTS)OF)A)SANITARY)LANDFILL)
! CONSTRUCTION)QUALITY)CONTROL)AND)QUALITY)ASSURANCE)(CQC/CQA))PLAN)
! EXAMPLES)OF)BOTTOM)LINER)SYSTEM)CONSTRUCTION)9)SOIL)&)GEOSYNTHETIC)MATERIAL)INSTALLING,)TESTING)&)IMPLEMENTING)CQC/CQA)PLAN)
KEY*COMPONENTS**(Soil*&*Geosynthe=cs)*
! Typical*boCom*liner*system**F*Single*Composite*
• Soil)Liner)• HDPE)Geomembrane)• Geocomposite)Drainage)Net)• ProtecLve)Soil)Cover)or)
Aggregate)Layer)
! Alternate*BoCom*Liner*System**F*Double*Composite*
)• ) Soil)Liner)• HDPE)Geomembrane)(S))• Geocomposite)Drainage)Net)• GeosyntheLc)Clay)Liner)• HDPE)Geomembrane)(P))• Geocomposite)Drainage)Net)• ProtecLve)Soil)Cover)or)Aggregate)
Layer)
CQC/CQA*PLAN*• Construction Quality Control/Assurance Plan
• Required by regulations • Controls and measures to meeting requirements
• Definitions included in a typical CQC/CQA Plan • Quality • Construction Quality Control • Construction Quality Assurance • Manufacturing Quality Control • Manufacturing Quality Assurance
• Construction Management • Construction Engineering
CQC/CQA*PLAN*
! Quality = Conformance to Requirements (Philip B. Crosby, Quality is Free, 1979) • Requirements = Plans, Specifications, Contract • In construction, Quality is measurable, quantitative
o Not about “goodness” or other qualitative terms " 94.9% compaction is not 95% compaction (min.) " 1.1x10-7 cm/sec is not 1x10-7 cm/sec (max.)
o Quantitative examples: " Depth, area, length, width " Percent compaction, moisture content, permeability " Elevations and grades " Etc…
COMMON TERMS (often misunderstood)*
! Construction Quality Control (CQC) • A planned system of inspections used to directly
monitor and control the quality of a construction project (EPA, 1986).
• Inspections, audits, tests and observations ! Construction Quality Assurance (CQA)
• A planned system of activities that provides the owner and permitting agency assurance that the facility was constructed as specified in the design (EPA, 1986).
• Inspections, audits, tests and observations
CONSTRUCTION QC & QA*
Construction Quality Control • Planned System of Inspections • Performed by Contractor
" Oversight by CQA Firm • Directly Monitor and Control
Quality " In “real time” to affect
changes • Assess Compliance with Plans and
Specifications " Information provided to
Contractor and Owner " Information suitable for
certification)
Construction Quality Assurance • Planning system of inspections • Third Party Firm
" Consultant or testing firm " Independent of Contractor,
Owner " Works for Owner (not
contractor) • Assess Compliance with Plans and
Specifications " Formal, Written Documentation
• Professional certification
COMMON TERMS (often misunderstood)*
! Construction Engineering (CE) • Bidding and negotiation assistance • Contractor selection • General support and guidance • Plans and specifications
! Construction Management (CM) • Organizing and directing men, materials and equipment to
accomplish the purpose of the designer (W. Gary Westernoff)
• Not same as CQA, CQC, CE " Supervising, managing construction forces " Means and methods " Direct and Active Role " Expends Construction Fund and Resources " Controls Time and Cost
MANUFACTURING QUALITY CONTROL (MQC)*
• Planned System of Inspections • Directly Monitor/Control Material
Manufacturer • Performed by Manufacturer
• geosynthetics, piping, pumps, etc.
• Compliance with Material Requirements
MANUFACTURING QUALITY ASSURANCE (MQA)*
! Planned System of Activities ! Inspections, Verifications, Audits by MQA
Firm • Independent consultant visits plant or tests
materials • “conformance tests”
! Assess Compliance with Plans and Specifications
EXAMPLES*BOTTOM*LINER*SYSTEM*CONSTRUCTION*
Cell 8 Battle Creek Landfill, Page Co, VA
Clay Liner Construction
Soil liner moisture conditioning
Compaction (Low Permeability Soil Liner) – Prince William Co., VA
Field Density testing for Soil Liner
Undisturbed soil sampling for permeability testing
Surveying base grade
60 mil textured HDPE Rolls delivered to site
Mfgr. Roll and batch identification #
Cecil County, MD Liner Deployment
Deploying HDPE Liner at Battle Creek Landfill, Page Co, VA
HDPE Deployment over Anchor Trench
Cell 8 Battle Creek Landfill, Page County, VA
Deployed HDPE at Battle Creek Landfill, Page Co, VA
HDPE Double Track Fusion Welder (“mouse”)
Vacuum Box Weld Testing
Extrusion Weld Repairs
Pressure Testing Results
Liner Panel Numbering
HDPE Liner Panel As-built
GCL Deployment at Prince William County
(to be covered with HDPE)
Geotextile Installation
Leachate Flow Direction
Perforated Leachate Collection Pipe
Protective cover aggregate (leachate collection)
Installing HDPE Sideslope Risers
Leak Detection Surveys
Other LF Features to be Constructed
Roads and Ditches Leachate Management
Stormwater Retention Ponds LFG Collection and Control
THANK*YOU*
Luis)Marinheiro)[email protected])+(351))919)562)937)
)James)Law,)P.E.,)IWM)[email protected])
+1)(919))60496102)