Derin Kazı Analizlerinde Küçük Şekil Değiştirme Rijitliğinin Etkisi

Year 2018, , 96 - 106, 31.01.2018

Mehmet İnanç Onur , Ahmet Arda Bahadır

https://doi.org/10.31202/ecjse.364289

Cited By: 1

Abstract

Zemin-yapı etkileşiminde derin kazı destek
sistemlerinin davranışı son yıllarda pek çok araştırmacı tarafından çalışılmaktadır.
Ancak zeminin küçük şekil değiştirme rijitliğini dikkate alan çalışmalar çok
fazla bulunmamaktadır. Bu durumun sebebi olarak bu etkiyi değerlendiren sonlu
elemanlar programlarının yeterli sayıda bulunmayışı söylenebilir. Bu çalışma
kapsamında geoteknik problemlerin çözümünde sıkça kullanılan bir sonlu
elemanlar programı olan Plaxis yazılımı ile analizler gerçekleştirilmiştir. Programın
kütüphanesinde birçok zemin modeli bulunmaktadır. Bunlar arasında sıkça
kullanılan Pekleşen Zemin Modeli (Hardening
Soil Model) ve bu modelin küçük şekil değiştirme rijitliği etkilerini dikkate
alan Pekleşen Zemin Küçük Birim Deformasyon Modeli (Hardening Soil Small Strain
Model) bu çalışmada kullanılmıştır. Bu modeller ile üç adet vakanın analizleri gerçekleştirilmiştir.
Analiz sonuçları inklinometre ölçümleri ile karşılaştırılmıştır. Çalışma
sonucunda model analiz sonuçları ile yerinde alınan ölçümler karşılaştırmalı
olarak sunulmuştur. HS_ss modelin HS modele
göre saha ölçümlerine daha yakın olduğu görülmüştür.

Keywords

Derin Kazılar, Pekleşen Zemin Modeli, Pekleşen Zemin Küçük Birim Deformasyon Model

The Effect of Small Strain Stiffness in Deep Excavation Analyzes

Abstract

The behavior of deep excavation support systems at soil-structure interaction has been studied by many researchers in recent years. However, studies that considering the rigidity of the small strain of the soil are not very common. For this situation, it can be said that there is not enough number of finite element programs evaluating this effect. Within the scope of this study, analyzes were performed by Plaxis software, is a finite element program, is frequently used to solve geotechnical problems. There are many soil models in the library of the program. Among these, Hardening Soil Model (HS), which is frequently used, and Hardening Soil Small Strain Model (HS_ss), which takes into account the effects of small strain stiffness of this model, were used in this study. Three cases were analyzed with these models. The analysis results were compared with the inlinometer measurements. As a result of the study, model analysis results and in situ measurements are presented comparatively. The HS_ss model was found to be closer to the field measurements than the HS model.

Keywords

Deep Excavation, Hardening Soil Model, Hardening Soil Small Strain Model

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