Identification of Expansive Soils and Ground Improvement Methods

Öz

Swelling problems generally occur in soils containing montmorillonit group clay minerals which are often present in semi arid regions. Swelling soils may cause considerable financial loss due to damages of one or two storey light structures, pipelines, roads, airports, retaining or garden walsl etc. Through early determination of swelling behavior of soils of this type and factors affecting it, possible damages can be decreased or prevented. There are numerous studies focusing on the measurement of swelling properties of such soils, most of which use the conventional one-dimensional consolidation test that measures the swelling pressure indirectly. In this study, the swelling of soils, identification are described in general terms and methods of improvement are discussed. It was considered that the study useful for the researchers and practitioners who study on the swelling soils.

Anahtar Kelimeler

• Swelling soils, swelling test methods.

Şişen Zeminlerin Tanımlanması ve Zemin

Öz

Şisme problemleri genellikle yarı-kurak iklimlerde görülen montmorillonit kil minerali içeren zeminlerde meydana gelmekte olup, gerekli önlemler alınmadıgında tek veya birkaç katlı binalara, boru hatlarına, yollara, hava limanlarına, istinat ve bahçe duvarlarına vb. hafif yapılara hasar vererek önemli maddi kayıplara neden olabilmektedir. Bu tür zeminlerin sisme davranıslarının ve bunlara etkiyen faktörlerin önceden belirlenmesi ile olusabilecek zararlar azaltılabilmekte, ya da tamamen önlenebilmektedir. Bu tür killerin sisme özelligini ölçmeye yönelik çok sayıda yöntem bulunmaktadır. Bu yöntemlerin çogunda sisme basıncı geleneksel boyutlu konsolidasyon yöntemiyle dolaylı olarak ölçülmektedir. Bu derlemede, sisen zeminlerin tanımlanması ve sınıflandırılması genel hatlarıyla açıklanmıs olup, iyilestirme yöntemlerinden bahsedilmistir. Sisen zeminleri çalısmaya yeni baslayacak olan arastırmacılar ve uygulamacılar için faydalı olacagı düsünülmüstür.

Anahtar Kelimeler

• Şisen zeminler, şisme deneyi yöntemleri

Kaynakça

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