Geosentetik Kil Örtülerin Hidrolik İletkenliklerinin Laboratuvarda Belirlenmesi Üzerine Bir Çalışma

Year 2015, Volume: 26 Issue: 4, 7191 - 7213, 01.10.2015

Ali Hakan Ören Havva Demirkıran

Abstract

Burada sunulan çalışma
geosentetik kil örtülerin (GKÖ) hidrolik iletkenlik deneylerinin nasıl
yapılacağını ve sonuçların nasıl değerlendirileceğini göstermek üzere
hazırlanmıştır. Bu çalışma kapsamında dört farklı GKÖ damıtık (deiyonize) su ve
çeşme suyu ile süzdürülerek hidrolik iletkenlik deneyine tabi tutulmuştur.
Deneyler altı ay sürdürülmüş ve GKÖ’lerin nihai hidrolik iletkenlikleri 7.110^-10 - 1.410^-9 cm/s arasında ölçülmüştür. Deneylerin
sonlandırılması için deney süresi boyunca hidrolik iletkenliklerin dengeye
(stabiliteye) ulaşıp ulaşmadığı kontrol edilmiştir. Bunun için hidrolik
iletkenlik oranı tanımlanmış ve bu oranın 1.5’un altına düştüğü noktada
hidrolik dengenin sağlandığı kabul edilmiştir. Ayrıca, süzüntü suyu ile GKÖ
tipinin hidrolik iletkenlik üzerine etkisinin sınırlı olduğu bulgulanmıştır. Bu
çalışma sonuçları daha sonra literatürde yayımlanan hidrolik iletkenliklerle
efektif gerilmenin fonksiyonu olarak karşılaştırılmıştır. Bu çalışmada elde
edilen hidrolik iletkenliklerin literatürle uyumlu olduğu sonucu çıkmıştır.

Keywords

Atık depolama alanı, bentonit, geosentetik kil örtü, hidrolik iletkenlik

A Study for Determining the Hydraulic Conductivity of Geosynthetic Clay Liners in the Laboratory

Abstract

This study was prepared
to show how to perform the hydraulic conductivity test on geosynthetic clay
liners (GCLs) and how to evaluate the results. In the content of this study,
four types of GCLs were subjected to hydraulic conductivity tests using
deionized water and tap water. The tests lasted six months and the final
hydraulic conductivities of GCLs were measured within the range of 7.110^-10 - 1.410^-9 cm/s. To terminate the tests, it
was checked to see whether hydraulic stability was achieved or not throughout
the test duration. To do this, hydraulic conductivity ratio was defined and it
was accepted that the stability was assured when this ratio was reduced below
1.5. Besides, it was found that the effect of permeant water and the GCL types
on the hydraulic conductivity were limited. The results of this study were also
compared with the hydraulic conductivities that were reported in the literature
as a function of effective stress. It is concluded that the findings of this
study are in agreement with those in the literature.

Keywords

Waste disposal area, bentonite, geosynthetic clay liner, hydraulic conductivity

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