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Journal of Geotechnical Engineering Original Research

Soil Around the Pier Below the Bed Level of River

  1. Birendra Kumar Singh Civil Engineering Department, Birla Institute of Technology, Mesra, Ranchi

Abstract

This study presents the evaluation of vertical and lateral loads acting on a bridge pier–pedestal system subjected to self-weight and vehicular loading. The pier, having a height of 25 m, length of 20 m, and thickness of 1 m, was found to carry a self-weight of 1200 t. When combined with a vehicular load of 2000 t, the total vertical load on the pier becomes 3200 t. Considering lateral force effects, 21.7% of the total load was applied as lateral load, resulting in 694 t acting over the full height and length of the pier. The pedestal supporting the pier, with dimensions 20 m × 20 m × 3 m, contributes an additional self-weight of 2880 t. Consequently, the combined load of the pier and pedestal amounts to 6080 t, producing a lateral load of 1319 t acting over a height of 20 m. Further, below 30 m from the riverbed level, the additional pedestal mass increases the total load to 10,400 t, resulting in a lateral load of 2257 t acting over a 30 m height. The analysis highlights the significant influence of self-weight accumulation with depth on lateral load demand, emphasizing the importance of accurate load estimation for safe pier and foundation design.

Keywords

References (10)

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