Study of soil deformation pattern in earth slope stabilised with pile

Abstract

This paper studies the slip surface shape of piled and no-piled slopes. Physical and numerical modelling of the foundations was performed adjacent to layered and homogenous slopes. This paper also studies the effects of pile position, surcharge distance from the slope crest, and the effects of loose layer thickness of piled and no-piled slopes on soil deformation patterns, the bearing capacity improvement ratio factor (BCR), and slope stability improvement ratio (N_ps). According to the no-piled slope results, for a 0 to 2.0B dense layer distance from the ground surface, the slip surface lies on the dense layer. The soil layer angles significantly affect slope stability and footing bearing capacity. Increasing the soft bound layer angle, decreased not only the thickness of the loose sand layer, but also the soil bearing capacity and slope stability. Furthermore, increases in the surcharge load distance from 2B causes general failure of the slope, whereas lower distances allow the failure shape to be surficial. According to the tests and numerical results, the use of pile elements was provided considerable lateral movement resistance. All tests are analysed numerically and a good agreement is observed between the experimental and numerical results.

Keywords:

• Pile
• slip surface
• surcharge load
• layered slope

Disclosure statement

No potential conflict of interest was reported by the authors.