The foundation system is designed to transfer the super structural load to the underneath soil stratum in such a way that it does not exceed the permissible value of shearing resistance of underneath soil and also within the permissible value of settlement of footing. The selection of appropriate ground improvement techniques can eliminate the necessity of deep footing. In this selection of ground improvement technique, the use of reinforcement in granular soil has been proven a very effective technique in case of shallow footing, but the load–deformation response of strip footing on the reinforced granular field is completely different from the load–deformation response of strip footing resting on the unreinforced granular field. Therefore, a proper standard is needed to determine the bearing pressure of strip footing laying on a reinforced granular field. The purpose of this study is to make a guide-line for bearing capacity factor (Nγ) based on the normalized settlement ratio (s/B) of strip footing resting on a reinforced granular field. The numerical modeling of strip footing resting on reinforced granular soil has been developed and verified with small-scale physical model test. The layout parameters of reinforced footing like the horizontal length of reinforcement (l), vertical distance of first reinforcement layer (u) are kept constant, whereas the number of reinforcement layers (N) and spacing between two reinforcement layers (h) are changed.

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A Guideline of Bearing Capacity of Strip Footing Resting on Reinforced Granular Soil Deposit

  • Puspendu Ray,
  • Ambarish Ghosh,
  • Dipankana Bhattacherjee

摘要

The foundation system is designed to transfer the super structural load to the underneath soil stratum in such a way that it does not exceed the permissible value of shearing resistance of underneath soil and also within the permissible value of settlement of footing. The selection of appropriate ground improvement techniques can eliminate the necessity of deep footing. In this selection of ground improvement technique, the use of reinforcement in granular soil has been proven a very effective technique in case of shallow footing, but the load–deformation response of strip footing on the reinforced granular field is completely different from the load–deformation response of strip footing resting on the unreinforced granular field. Therefore, a proper standard is needed to determine the bearing pressure of strip footing laying on a reinforced granular field. The purpose of this study is to make a guide-line for bearing capacity factor (Nγ) based on the normalized settlement ratio (s/B) of strip footing resting on a reinforced granular field. The numerical modeling of strip footing resting on reinforced granular soil has been developed and verified with small-scale physical model test. The layout parameters of reinforced footing like the horizontal length of reinforcement (l), vertical distance of first reinforcement layer (u) are kept constant, whereas the number of reinforcement layers (N) and spacing between two reinforcement layers (h) are changed.