Determination of Rock Mass Deformation Modulus by Different Methods.

Yıl 2014, , 141 - 168, 01.04.2014

Kadir Karaman Ferdi Cihangir Serkan Demirel Ayhan Kesimal

https://doi.org/10.17824/huyuamd.68314

Öz

Among the many design properties, the deformation modulus (E) of in-situ rock mass is a crucial parameter and has a vital importance for the design and successful execution of rock engineering projects. However, in-situ tests are time–consuming, expensive and, in some cases, even impossible to carry out. This constraint forced the investigators to develop an empirical equation for indirect estimation of the deformation modulus of rock masses based on other rock mass properties that can be easily determined at low cost such as RQD, RMR, Q, etc. In this study an empirical equation was proposed for tested rock masses. For these purposes, volcanic, sedimentary and metamorphic rock masses were studied at different thirty seven points along a tunnel alignment. For comparison, Em was calculated from six other empirical equations recommended in the literature. Multiple comparison tests (ANOVA) were also performed among the new relation and other empirical equations. Based on the ANOVA analyses, the Em of a rock mass can be estimated from the proposed equation reliably

Anahtar Kelimeler

Deformation modulus, point load index, RMR, RQD, Q

Kaya Kütlesi Deformasyon Modülünün Farklı Yöntemlerle Belirlenmesi.

Öz

Birçok tasarım parametresi arasında kaya kütlelerinin yerinde deformasyon modülü (Em) kaya mühendisliği projelerinin başarıyla yürütülmesinde ve tasarımında hayati öneme sahip olan önemli bir parametredir. Ancak, yerinde testler zaman alıcı ve pahalı hatta bazı durumlarda yapılması imkânsız olabilmektedir. Bu sınırlandırmalar, araştırmacıları deformasyon modülünü daha düşük fiyatla kolay bir şekilde diğer kaya kütle özelliklerine (RQD, RMR, Q) dayanarak dolaylı olarak tahmininde ampirik eşitlik geliştirmesine zorlamıştır. Bu çalışmada da kaya kütleleri için ampirik bir eşitlik önerilmiştir. Bu amaca yönelik olarak, bir tünel güzergâhının otuz yedi farklı noktasındaki volkanik, tortul ve metamorfik kaya kütleleri üzerinde çalışılmıştır. Karşılaştırmak amacıyla, literatürde önerilmiş olan altı farklı ampirik eşitlik yardımıyla Em değerleri hesaplanmıştır. Çoklu karşılaştırma ANOVA testleri ayrıca önerilen ve diğer eşitlikler arasında yapılmıştır. ANOVA analizleri bu çalışmada üretilen eşitliğin kaya kütlelerinin Em değerlerinin belirlenmesinde güvenle kullanılabileceğini göstermiştir

Anahtar Kelimeler

Deformasyon modülü, nokta yükleme indeksi, RMR, RQD, Q

Kaynakça

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