Mitat ÖZTÜRK, Cafer KAYADELEN, Gökhan ALTAY, Yakup ÖNAL

Çimento kaplı geotekstil ile güçlendirilmiş kumlu zeminlerin yük deplasman davranışının incelenmesi

Bu çalışmada, çimento kaplı geotekstil ile güçlendirilmiş zeminlerin davranışını incelemek için tipik Kaliforniya Taşıma Oranı (CBR) deneyleri yapılmıştır. Bu amaçla kum zemin ve temel malzemesi için önce geotekstil daha sonra çimento kaplı geotekstil ile güçlendirilmiş deneyler yapılmıştır. Geotekstil ile güçlendirilmiş zeminler ile yapılan deneylerin sonuçları çimento kaplı geotekstil ile güçlendirilmiş zeminlerin deneylerinden elde edilen sonuçlarla karşılaştırılmıştır. Ayrıca güçlendirilmemiş durumdaki zeminin deney sonuçları güçlendirilmenin yapıldığı durumlar ile de kıyaslanmıştır. Deney sonuçları yük-deplasman davranışı ve CBR değerleri açısından değerlendirilmiştir. Bu sonuçlara göre, çimento kaplı geotekstil ile güçlendirilmiş temel malzemesi, güçlendirilmemiş duruma göre daha iyi performans göstermiştir; ancak geotekstil ile güçlendirilmiş temel malzemesi 6 mm yer değiştirmeye kadar güçlendirilmemiş durumdan daha kötü performans göstermiştir. Öte yandan hem geotekstil hem de çimento kaplı geotekstil ile güçlendirilmiş durumlar, kum zeminde donatısız duruma göre daha iyi performans göstermiştir. Ayrıca çimento kaplı geotekstil ile güçlendirilmiş durumlar hem kum zeminde hem de temel malzemesinde geotekstil ile güçlendirilmiş durumlara göre daha iyi performans göstermiştir. CBR değerleri açısından, geotekstil ve çimento kaplı geotekstil ile güçlendirilmiş kum zemin sırasıyla 1,68 ve 3,25 kat iyileşme göstermektedir. Çimento kaplı geotekstil ile güçlendirilmiş temel malzemesinin CBR değeri %59 artarken, geotekstil ile güçlendirilmiş durumda %4 azalmıştır.

Anahtar Kelimeler:

Geotekstil, Çimento kaplı geotekstil, CBR deneyi, Yük-deplasman davranışı, CBR değeri

Investigation of load-displacement behavior of cement-coated geotextile reinforced sandy soils

In this study, typical California Bearing Ratio (CBR) experiments were conducted to examine the behavior of cement-coated geotextile reinforced soils. For this purpose, firstly geotextile-reinforced then cement-coated geotextile-reinforced tests were carried out for sand soil and base material. The results of the experiments reinforced soils with geotextile were compared with the results obtained from the tests of reinforced soils with cement-coated geotextile. In addition, the test results of the unreinforced soil were compared with the reinforced conditions. The results of the experiments were evaluated in terms of load-displacement behavior and CBR values. In view of this results, base material reinforced with cement-coated geotextile outperformed compared to the unreinforced case; however, geotextile reinforced base material demonstrated worse than the unreinforced case, up to 6 mm displacement. On the other hand, both the geotextile reinforced, and cement-coated geotextile reinforced cases outperformed the unreinforced case on sand soil. In addition, cement-coated geotextile reinforced cases demonstrated better performance compared to the geotextile cases on both sand soil and base material. In terms of CBR values, geotextile and cement-coated geotextile reinforced sand soil indicated improvements of 1.68 and 3.25 times, respectively. While the CBR value of the cement-coated geotextile reinforced base material increased by 59%, it decreased by 4% in the geotextile reinforced case.

Keywords:

Geotextile, Cement-coated geotextile, CBR experiment, Load-displacement behavior, CBR value,

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