Matakuliah : S0522/ Aplikasi Geosintetik Dalam Teknik SipilTahun : Juli 2005Versi : 01/01
Pertemuan 08GEOSYNTHETICS CLAY LINERS
( GCL)
Learning Outcomes
Pada akhir pertemuan ini, diharapkanmahasiswa akan mampu :• Mahasiswa mampu menghitung dan
mendesain aplikasi pemakaian GCL sesuai kondisi lapangan dan kebutuhan. C3 , C5
• Mahasiswa mampu membandingkan pemakaian GCLl sesuai dengan analisa desain bagi perbaikan tanah. C4
Outline Materi
• GCL• Fungsi dan properties• Metoda desain dan pemilihan GCL• Perhitungan dan perencanaan GCL• Metoda Konstruksi pemasangan GCL
Sebagian Materi ini diambil dari IGS Lecturer NotesNo. 16 of 19Geosynthetics in Landfills: Caps and Covers byDr-Ing Erwin GartungLGA Nürnberg, Germany
Laying GCL Capping
Geosynthetic Clay Liners
• GCLsare composed of mineral and geosynthetic
components are very thin in comparison with compacted clay are manufactured industrially
are transported to the construction siteare installed easily by construction
contractors are hydrating and swellingare highly efficient hydraulic
barriers are sensitive with respect to mechanical damage are applied for the protection of the environment
Laying GCL
Lapping GCLs
General Requirements
• Sealing function
• Mechanical resistance
• Durability• Constructability
Manufacturing Quality Control
• Of raw materials, bentonite, geosynthetics
• Of intermediate products, geotextiles
• Of production process, documentation
• Of the finished product, GCLs
Construction Quality Control
• Installation according to design drawing• subgrade properly prepared i.e.
free of stones
• anchoring ditches
• liners are checked for mechanical damage
Laying Polymeric Capping
Double Seam Joint in HDPE
Geosynthetic Multi-layer Capping
Seam Welder
Air Pressure Test of Seam
Tensile Test of Seam Sample
Multi-layer Geosynthetic Capping
Poor Workmanship Allowing GCL to become ‘wrinkled’
Drainage Geocomposites
• Advantages: – Small mass, – Small thickness, – Savings in waste storage space,– Easy handling and placement,– Uniform quality,– Available in all parts of the world– Low costs
Drainage Geocomposite
Recycled Polymers used as a Drainage Geocomposite
Recycled Polymers used as a Drainage Geocomposite
Geosynthetic Capping
Drainage Geocomposite
Leachate Collection System
Geocomposite Capping System
Summary
• Geomembranes, geocomposite drains, geotextiles, geosynthetic clay liners and geogrids are generally accepted as reliable members in the construction of
landfill liners and covers
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