Pertemuan 08 GEOSYNTHETICS CLAY LINERS

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 of landfill liners
  and covers