Yamaç Duraylılığı Araştırmalarında 2D ve 3D FEM-SSR Yöntemlerinin Uygulanması: Borçka (Artvin) Yöresinden Örnek Bir Çalışma

Yıl 2019, , 272 - 283, 15.04.2019

Ayberk Kaya

https://doi.org/10.17714/gumusfenbil.428667

Öz

Bu çalışma kapsamında Yeniyol (Borçka-Artvin)
Mahallesi’deki yeni devlet hastanesinin inşaatı için açılan zemin şevinde
meydana gelen duraysızlık problemi mühendislik jeolojisi açısından
incelenmiştir. Yapılan çalışmalar sırasıyla arazi, laboratuvar ve duraylılık
analizi çalışmaları olmak üzere üç aşamada yürütülmüştür. Bu amaçla toplam 108
m derinliğinde 3 adet sondaj kuyusu açılmış, 1 profilde jeofizik çalışmalar
gerçekleştirilmiş ve 1 sondaj kuyusunda inklinometre ölçümleri yapılmıştır.
Arazi çalışmaları sonucunda ana kayayı Eosen yaşlı Kabaköy Formasyonu’na ait volkanik
kayaçların oluşturduğu ve bu birimlerin üzerine alttan üstte doğru
kumlu-çakıllı ve killi-siltli olmak üzere iki seviyeden oluşan yamaç molozunun
geldiği saptanmıştır. Yamaç molozunun fiziko-mekanik özelliklerini belirlemek
için araştırma sondajlarından örselenmemiş örnekler alınmıştır. Arazi ve
laboratuvar çalışmalarından elde edilen veriler yardımıyla sonlu elemanlar
tabanlı 2D ve 3D Kayma Dayanımı Azaltma Yaklaşımı (FEM-SSR) yöntemleri
kullanılarak duraylılık analizleri yapılmış ve sonuçlarının birbiriyle uyumlu
olduğu saptanmıştır. Sonuç olarak kazı şevinde önlem alınmaması durumunda önüne
geçilemez mühendislik sorunlarıyla karşılaşılacağı belirlenmiştir. Destekleme
yöntemi olarak ise fore
kazık uygulamasının yapılması önerilmektedir.

Anahtar Kelimeler

Duraylılık analizi, 2D ve 3D FEM-SSR yöntemi, İnklinometre ölçümleri

Application of the 2D and 3D FEM-SSR Methods in Slope Stability Investigations: A Case Study from Borçka (Artvin) Region

Öz

In the scope
of this study, the stability problem in the soil slope excavated for the
construction of the new government hospital in the Yeniyol (Borçka-Artvin) quarter
was investigated in terms of engineering geology. The studies were performed in
three stages as field, laboratory works and stability analyses. For this
purpose, three boreholes with a total of 108 meters in length were drilled,
geophysical studies were performed along the one line and inclinometer
measurements were taken in one borehole. The talus consisting of two levels as
sandy-gravelly and silty-clayey soils overlies the Eocene-aged Kabaköy
Formation comprising the volcanic rocks. To determine the physico-mechanical
properties of talus, undisturbed samples were taken from boreholes. 2D and 3D FEM-SSR
stability analyses were evaluated using the obtained data from field and
laboratory studies. It was determined that the stability analyses results are compatible
with each other. As a result, it was determined that unforeseen engineering
problems will be encountered if measures are not taken in the slope. It is
suggested to apply fore pile application as support method.

Anahtar Kelimeler

Stability analysis, 2D and 3D FEM-SSR method, Inclinometer measurements

Kaynakça

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