Pertemuan 08 GEOSYNTHETICS CLAY LINERS ( GCL)

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