Abstract
The issue of foundation on slopes is associated with bearing capacity as well as slope stability problems. Several investigations are conducted in the past for assessing the ultimate load-carrying capacity and settlement of isolated shallow footing on or near the slope. Very few researches are conducted to study the mechanism associated with the response of interfering footings near a slope. The present study reports about a numerical investigation conducted to study the response of a 14 m high and 220 kV electrical transmission tower located on the crest created by benching of the hill slope. The foundation of the electric transmission tower comprises four isolated square footings for each of its legs. The stability of slope, and in turn the stability of the transmission tower, was jeopardized due to toe cutting. The present study highlights the influence of different footing typologies on the increment of the bearing capacity and enhancement in the resistance to slope failure. It is established that the factor of safety against slope failure (when subjected to toe cutting) increased by 11.71% for a grid footing formed by interconnecting all the isolated square footings beneath the transmission tower.
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Acharyya, R., Dey, A. (2021). Influence of Footing Typologies on the Stability of a Transmission Tower Resting on the Bench of a Hill Slope. In: Barla, M., Di Donna, A., Sterpi, D. (eds) Challenges and Innovations in Geomechanics. IACMAG 2021. Lecture Notes in Civil Engineering, vol 126. Springer, Cham. https://doi.org/10.1007/978-3-030-64518-2_50
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