Several ground improvement methods have been implemented to improve the stability of the slope. This paper focuses on experimental research to analyze the performance of unreinforced and reinforced slopes subjected to various time history motions using a 30 kN capacity uniaxial shake table. The study is conducted on a 1:10 scaled-down slope of silty soil. The complete scaled-down setup is developed in the laboratory. The slope is developed in the laboratory by compacting the soil under optimum conditions to resemble field conditions. The slope soil is confined in a container simulating the absorbing boundary condition. This system is positioned on a vibrating table to exert dynamic forces through time history. The slope is reinforced with geocell filled separately with soil and aggregate, respectively. The unreinforced and reinforced slopes were built have inclinations of 300 and were influenced by three-time histories, namely, El Centro, Uttarkashi, and Indo-Burma. The acceleration response of the slopes is measured by an accelerometer located at 1/3rd and 2/3rd of the height of the slope. The acceleration values at the same point are used to calculate the velocity and displacement at these points. The performance of reinforced slopes is compared with unreinforced slopes for similar time histories. The parameters considered for the comparison are displacement, acceleration, and velocity. The acceleration outcomes for geocell-reinforced slopes show a notable decrease compared to the unreinforced slope, suggesting greater stability. The geocell-reinforced slope filled with aggregates is more stable than the geocell-reinforced slope filled with soil, producing lesser acceleration velocity and displacement. Thus, geocell reinforcement provides more stability to the slope.

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Experimental Study on Seismic Response of Geocell Reinforced Soil Slope

  • Mahesh Kalyanshetti,
  • Avinash Angadi

摘要

Several ground improvement methods have been implemented to improve the stability of the slope. This paper focuses on experimental research to analyze the performance of unreinforced and reinforced slopes subjected to various time history motions using a 30 kN capacity uniaxial shake table. The study is conducted on a 1:10 scaled-down slope of silty soil. The complete scaled-down setup is developed in the laboratory. The slope is developed in the laboratory by compacting the soil under optimum conditions to resemble field conditions. The slope soil is confined in a container simulating the absorbing boundary condition. This system is positioned on a vibrating table to exert dynamic forces through time history. The slope is reinforced with geocell filled separately with soil and aggregate, respectively. The unreinforced and reinforced slopes were built have inclinations of 300 and were influenced by three-time histories, namely, El Centro, Uttarkashi, and Indo-Burma. The acceleration response of the slopes is measured by an accelerometer located at 1/3rd and 2/3rd of the height of the slope. The acceleration values at the same point are used to calculate the velocity and displacement at these points. The performance of reinforced slopes is compared with unreinforced slopes for similar time histories. The parameters considered for the comparison are displacement, acceleration, and velocity. The acceleration outcomes for geocell-reinforced slopes show a notable decrease compared to the unreinforced slope, suggesting greater stability. The geocell-reinforced slope filled with aggregates is more stable than the geocell-reinforced slope filled with soil, producing lesser acceleration velocity and displacement. Thus, geocell reinforcement provides more stability to the slope.