Plaka yükleme deneyi ile laboratuvar deneylerinden bulunan emin taşıma gücünün karşılaştırılması üzerine bir araştırma
Başlık çevirisi mevcut değil.
- Tez No: 23132
- Danışmanlar: Belirtilmemiş.
- Tez Türü: Yüksek Lisans
- Konular: İnşaat Mühendisliği, Civil Engineering
- Anahtar Kelimeler: Plaka yükleme deneyi, Taşıma gücü, Zemin, Plate bearing test, Bearing capacity, Soil
- Yıl: 1992
- Dil: Türkçe
- Üniversite: Çukurova Üniversitesi
- Enstitü: Fen Bilimleri Enstitüsü
- Ana Bilim Dalı: İnşaat Mühendisliği Ana Bilim Dalı
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: Belirtilmemiş.
Özet
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Özet (Çeviri)
62 SUMMARY Engineering properties of soils on which the buildings are to be situated may exhibit delicate technical problems. Due to a possible lack of technical investigation of the soil properties» cracks and fractures in and even failure of a structure may result because of partial foundation settlements over time. Therefore, it is of utmost importance to perform all the necessary investigations and tests suitable for the type of soil, which are mostly available in the relevant literature. A single“allowable bearing pressure”concept, which supposedly represents the mechanical behaviour of the soil, its bearing capacity, its compaction, and its possible heterogeneous structure, all in a unique numerical value is still widely used in the recent times, also. The allowable bearing pressure is usually defined as the ultimate bearing capacity of the soil divided by a factor of safety. Various methods have been developed for determination of the allowable bearing pressure, which can be classified into two main groups as laboratory and in-situ tests and analyses. The allowable bearing pressure can be computed as a result of the laboratory tests which are principally direct shear box, unconfined compression, and consolidation tests, each one suitable for a particular type of soil. The in-situ analyses aim at predicting the allowable bearing pressure directly right in the field at the foundation location. Because the in-situ instrumentation may not be as sensitive and we 1 1 -deve loped as and because the field conditions may not be as favourable as those in the laboratory, the in-situ findings usually are much coarser and less consistent than those of the laboratory investigations. In this study, a clayey type of soil was taken, and it has been analyzed in two phases, one in the laboratory, and63 the other in the field to determine its mechanical properties. In the field, three test pits of sufficiently large dimensions were excavated. Firstly, a sufficient number of undisturbed samples were extracted out of these pits, and all the necessary laboratory experiments were performed on them. In parallel to the laboratory investigations, plate loading tests were performed in the field, also. In conclusion, nonnegligible discrepancies between the laboratory-obtained properties and those of the plate loading tests have been observed, and it was understood that the plate load test as applied in accordance with the regulations currently in use in Turkey may yield incorrect and misleading soil properties for the clayey types. The values determined as a result of the plate load tests were found to be considerably greater or smaller than the normal upper and lower limits of allowable bearing pressures proposed for clayey soils in the well-known relevant 1 iterature.
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