Infrastructure and building construction are rapidly growing in hilly areas due to modern urbanisation and land scarcity. Shallow isolated footings on the slope's crest or face are the most common for residential structures. The proximity of a footing to the slope surface has a considerable impact on its bearing capacity. Compared to a footing lying on a semi-infinite soil medium, a foundation on a slope offers less passive resistance since the constrained domain of passive resistance forms towards the slope face. Various numerical methods evolved for analysing shallow foundations on slopes in the past few decades; among them, the finite element method has recently drawn attention. This paper examines the effects of sloping angle and set-back distance on bearing capacity by using a finite element-based software called "PLAXIS 3D". This study conducts a comprehensive analysis involving various combinations of c-φ soil properties and geometric parameters of footing. The result indicates that the bearing capacity decreases as slope inclination increases, and the set-back distance also influences the bearing capacity value. Outcome results also show that a sloping angle does not influence bearing capacity after a certain set-back distance and acts like a foundation on semi-infinite horizontal ground.

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Effect of Sloping Angle and Setback Distance on the Bearing Capacity of a Square Foundation: A Numerical Based Approach

  • Joydeep Atta,
  • Ashis Kumar Bera

摘要

Infrastructure and building construction are rapidly growing in hilly areas due to modern urbanisation and land scarcity. Shallow isolated footings on the slope's crest or face are the most common for residential structures. The proximity of a footing to the slope surface has a considerable impact on its bearing capacity. Compared to a footing lying on a semi-infinite soil medium, a foundation on a slope offers less passive resistance since the constrained domain of passive resistance forms towards the slope face. Various numerical methods evolved for analysing shallow foundations on slopes in the past few decades; among them, the finite element method has recently drawn attention. This paper examines the effects of sloping angle and set-back distance on bearing capacity by using a finite element-based software called "PLAXIS 3D". This study conducts a comprehensive analysis involving various combinations of c-φ soil properties and geometric parameters of footing. The result indicates that the bearing capacity decreases as slope inclination increases, and the set-back distance also influences the bearing capacity value. Outcome results also show that a sloping angle does not influence bearing capacity after a certain set-back distance and acts like a foundation on semi-infinite horizontal ground.