• Raval Purav Atulkumar
• U.K. Patel
• Dr. M.V. Shah

This study has been carried out to determine capacity of piles as a foundation for transmission tower. The transmission tower structures are subjected to various forces such as lateral forces , uplift forces and moments during its service period. These forces are transferred to foundation and subsequently to the sub soil. Thus the foundations are subjected to large uplift and moments due to wind load and conductor tensile forces. Thus it is important to determine foundation capacity of transmission towers to ensure safe and economic design .In this study the model transmission tower was fabricated and rested on bored cast in- situ concrete piles of slenderness ratio of 4,6 and 8.The field load tests were carried out on the tower foundation system to determine its maximum load carrying capacity. The effect of slenderness ratio on the load carrying capacity was evaluated. The load vs displacement and load vs settlement curves were obtained using test data. It was observed that the capacity of piles in tension is less than the capacity of piles under compression. Also it was noted that the failure in tension piles occur way before the full capacity of compression piles get mobilized.

Uplift capacity, Pile foundation, Transmission tower, Model test

"EFFECT OF PULL-OUT FORCES ON TRANSMISSION TOWER RESTING ON PILE FOUNDATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.298-301, April-2019, Available :http://www.jetir.org/papers/JETIR1904544.pdf

"EFFECT OF PULL-OUT FORCES ON TRANSMISSION TOWER RESTING ON PILE FOUNDATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp298-301, April-2019, Available at : http://www.jetir.org/papers/JETIR1904544.pdf