Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Investigation of clay of rey town improvement with glass fibers and its effect on reducing the settling of strip foundations

Document Type : Original Article

Authors
Masoud Zabihi Samani 1
Parvin Dolati 2
Zahra Babaei 3
mostafa Daryabari 2
1 Department of Civil Engineering,, Parand branch, Islamic Azad University, Parand, Iran
2 Department of Civil Engineering, Parand Branch, Islamic Azad University, Parand, Iran
3 Department of Civil Engineering, East-Tehran Branch, Islamic Azad University, Tehran, Iran
10.22065/jsce.2021.300156.2535
Abstract
The addition of glass fibers has been used to stabilize the unsuitable clay of Rey city to reduce the subsidence in the strip foundations due to the improvement of resistance parameters. The combination of glass fibers with clay and the effect of using this additive on the stabilization of clay fine-grained clay (CL) were investigated in the laboratory. Soil samples in the natural state as well as in the combined state with different percentages of glass fibers equal to 0.2, 0.4 and 0.6, 0.8 and 1% of the dry weight of the soil were used for laboratory tests including standard compaction test, California load ratio test and direct cutting. Were located. The results show a decrease in unit weight of maximum soil volume and an increase in optimum moisture content, as well as a California load-bearing ratio by adding this material to the clay. The amount of adhesion and the internal friction angle resulting from the direct shear test increase with increasing percentage of glass fibers. After laboratory studies, the effects of using modified soil with improvement depths of one meter, two meters, four meters for strip foundations with widths of 0.75, 1.50 and 2.25 meters with the help of Plaxis2D software show that by increasing the percentage of mixing glass fibers In fine-grained clay soils, the amount of foundation deposition is reduced, while the reduction of foundation deposition on soil mixed with 0.8% glass fibers is more than soil mixed with 1% glass fibers. The reduction rate of the strip foundation with a width of 0.75 m with a mixing percentage of 0.8 glass fibers and a depth of improvement of 4 m is 1.57 cm. ،he reduction rate of the desired foundation with widths of 1.5 and 2.25 meters is equal to 2.29 and 2.72 cm, respectively
Keywords
Glass fibers
clay
soil improvement
Strip foundation
Rey City

Subjects

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Journal of Structural and Construction Engineering
Volume 9, Issue 6 - Serial Number 59
September 2022
Pages 81-107

  • Receive Date 16 August 2021
  • Revise Date 10 November 2021
  • Accept Date 25 November 2021