The Effect of Different Fiber Reinforcement on Bearing Capacity under Strip Foundation on the Sand Soil: An Experimental Investigation

被引:5
作者
Alcan, Bilge Aksu [1 ]
Celik, Semet [2 ]
机构
[1] Kafkas Univ, Dept Civil Engn, TR-36100 Kars, Turkiye
[2] Ataturk Univ, Dept Civil Engn, TR-25240 Erzurum, Turkiye
来源
APPLIED SCIENCES-BASEL | 2023年 / 13卷 / 17期
关键词
basalt fiber; glass fiber; macro-synthetic fiber; hybrid fiber; bearing capacity ratio; randomly reinforced soil; PIV; STRENGTH; BEHAVIOR; MECHANISM;
D O I
10.3390/app13179769
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The aim of this study is to investigate the bearing capacity-settlement behavior of strip footing settling on sand soil randomly reinforced with glass fiber, basalt fiber, macromesh fiber, and four different hybrid fiber additives in which these fibers are used together. Model tests were carried out in the laboratory on the strip footing and placed on the unreinforced and reinforced sand with different fibers. In the study, model tests were carried out on seven types of randomly reinforced soils by using glass, basalt, macrame, and mixtures of these fibers as reinforcement. In the model tests, two different fiber contents, 1% and 2%, and two different fiber lengths, 24 mm and 48 mm, were used. Tests were carried out with Dr = 30% and 50% relative density, and reinforcement depths 1B, 2B, and 3B were selected. In addition, the photographs taken during the test were analyzed with the particle image velocimetry (PIV) method and the displacements on the soil were examined. As a result of the reinforced and unreinforced model tests, the highest ultimate bearing capacity was measured as 680 kPa from the tests with Dr = 50% relative density, 48 mm length, 2% contents, and 3B depth macromesh fiber reinforced. In hybrid fibers, the highest ultimate bearing capacity was measured as 495 kPa, with Dr = 50% relative density, 48 mm length, 2% contents, and 2D depth micromesh and basalt fiber-reinforced tests. In the reinforced tests, it was concluded that the most effective fiber on bearing capacity is macromesh fiber. It can be seen that in the PIV analysis, as the fiber additive increased, the settlements made by the foundation decreased under the same pressure. It has also been observed that adding reinforcement to the soil transfers the stresses occurring in the soil to a wider area.
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页数:29
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