HBRP Publication Page 1-7 2020. All Rights Reserved Page 1 Journal of Advances in Geotechnical Engineering Volume 3 Issue 1 DOI: http://doi.org/10.5281/zenodo.3882012 Influence of Flood on the Behaviour of Friction Piles Athira R. S. 1* , Jasna S. H. 2 , K. A. Renjini 3 , Manjima Jayan 4 , Shruthi Johnson 5 , Jayamohan Jayaraj 6 1,2,3,4 Student, 5 Assistant Professor, 6 Professor Department of Civil Engineering, LBSITW, Trivandrum, Kerala, India. *Corresponding author email id:-athira04cdlm@gmail.com ABSTRACT Structures are commonly supported on pile foundations at locations having marginal soil. Friction piles are provided wherever the depth to a hard stratum is large. The load settlement behavior of a friction pile entirely depends on the interaction between soil and the pile material at their interface. Recently our state experienced unprecedented flood which caused wide spread damage to various type of structures and their foundations. It was observed that the majority of failure of structures occurred due to the failure of foundation. This paper investigates the influence of drawdown of water on the load – settlement behavior and stability of friction piles. The results of a series of laboratory scale load tests to determine the influence of drawdown on the settlement of pile are presented. Laboratory scale load tests on model pile are carried out in a masonry tank, which has arrangements for pumping in water and drawdown. The impact of rate of drawdown on settlement is concentrated by differing the release of inflow of water. It is seen that the settlement of pile significantly increments because of unexpected drawdown. Keywords:-Pile foundation, drawdown, Settlement INTRODUCTION Our state of Kerala experienced unprecedented flood quite recently which caused widespread destructions to various structures. One among the main reasons for the collapse of structures was the failure of foundation due to the sudden movement of water. Harms to the structure during immersions can be the consequence of not just the immediate movement of the flood wave and surface water, yet additionally changes in groundwater stream conditions, including the expansion of their piezometric level. In the previous not many decades numerous inquires about have been done to examine the examination of settlement in establishment because of ascent of ground water. It has been demonstrated that there is an expansion in settlement bringing about lessening in bearing limit during immersion. Ascent of ground water level is accepted to build the settlement altogether and had been a subject of research for a long time. A portion of the examinations which have been directed in this field are the impact of Submergence on Settlement and Bearing Capacity by Monir Kazi et.al (2015). They directed basic research center investigations and have indicated that the sand bed settles fundamentally when it is lowered submerged for lower estimations of relative thickness. Terzaghi (1943) hypothesized that the submergence of the sand decreases the dirt solidness significantly, which thus copies the settlement. Stress and pore water pressure changes in somewhat immersed soils under strip footings had been concentrated by Mohammed Yousif Fattah et.al(2014).They reported that there are two phenomenagoverningthebehavioroffootingr epresentedbysettlement(negative vertical displacement) and heave (positive vertical displacement). An increase of load on the foundation will increase the settlement and the failure surface will gradually extend outward from the foundation in heave behaviour. This paper researches the effect