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Pertemuan 08 GEOSYNTHETICS CLAY LINERS ( GCL)

Matakuliah : S0522/ Aplikasi Geosintetik Dalam Teknik Sipil Tahun : Juli 2005 Versi : 01/01. Pertemuan 08 GEOSYNTHETICS CLAY LINERS ( GCL). Learning Outcomes. Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu :

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Pertemuan 08 GEOSYNTHETICS CLAY LINERS ( GCL)

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  1. Matakuliah : S0522/ Aplikasi Geosintetik Dalam Teknik Sipil Tahun : Juli 2005 Versi : 01/01 Pertemuan 08GEOSYNTHETICS CLAY LINERS ( GCL)

  2. Learning Outcomes Pada akhir pertemuan ini, diharapkan mahasiswa 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

  3. 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 Notes No. 16 of 19 Geosynthetics in Landfills: Caps and Covers by Dr-Ing Erwin Gartung LGA Nürnberg, Germany

  4. Laying GCL Capping

  5. Geosynthetic Clay Liners • GCLs are composed of mineral and geosynthetic components are very thin in comparison with compacted clay are manufactured industrially are transported to the construction site are installed easily by construction contractors are hydrating and swelling are highly efficient hydraulic barriers are sensitive with respect to mechanical damage are applied for the protection of the environment

  6. Laying GCL

  7. Lapping GCLs

  8. General Requirements • Sealing function • Mechanical resistance • Durability • Constructability

  9. Manufacturing Quality Control • Of raw materials, bentonite, geosynthetics • Of intermediate products, geotextiles • Of production process, documentation • Of the finished product, GCLs

  10. Construction Quality Control • Installation according to design drawing • subgrade properly prepared i.e. free of stones • anchoring ditches • liners are checked for mechanical damage

  11. Laying Polymeric Capping

  12. Double Seam Joint in HDPE

  13. Geosynthetic Multi-layer Capping

  14. Seam Welder

  15. Air Pressure Test of Seam

  16. Tensile Test of Seam Sample

  17. Multi-layer Geosynthetic Capping

  18. Poor Workmanship Allowing GCL to become ‘wrinkled’

  19. 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

  20. Drainage Geocomposite

  21. Recycled Polymers used as a Drainage Geocomposite

  22. Recycled Polymers used as a Drainage Geocomposite

  23. Geosynthetic Capping

  24. Drainage Geocomposite

  25. Leachate Collection System

  26. Geocomposite Capping System

  27. Summary • Geomembranes, geocomposite drains, geotextiles, geosynthetic clay liners and geogrids are generally accepted as reliable members in the construction oflandfill liners and covers

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