Proceedings of DFI-India 2018: 8th Conference on Deep Foundation Technologies for Infrastructure Development in India, (DFI)
Behavior of Single Pile and Pile Groups Subjected to Abrupt Collapse of Retaining Wall
Kranthikumar A., Research Scholar, Ravi S. Jakka, Associate Professor and Rajesh P. Shukla, Research Scholar
Retaining walls are often used to support the unstable backfill soil. In certain circumstances, structures like high rise buildings, bridge and bridge abutments, transmission towers and offshore platforms are constructed adjacent to retaining walls. Pile foundations are generally used to support these type of structures. Retaining walls near these foundations may suddenly fails sometimes, and they can affect the stability and safety of nearby structures and foundations. In this study, experiments are done on small scale model piles to determine the settlement of pile foundations exposed to the movement of soil induced from the abrupt collapse of a retaining wall. Various factors affecting the behavior of single piles and pile groups are considered. Embedment ratio and critical height of collapsed retaining structure are the two most important factors affecting the settlement of piles. The settlement of piles increases with the increase in height of retaining wall collapsed. In piles of embedment ratio 10, the settlement increases with increase in the spacing, and increase in number of piles, while piles of embedment ratio 20 show behavior opposite to the piles of embedment ratio 10. In general, settlement of piles decreases about 20 to 50 % with the increase in embedment ratio of piles group. Piles group with small embedment ratio affected more severely due to abrupt collapse of retaining wall than the piles of large embedment ratio. The increase in the settlement with the increase in the height of collapsed retaining wall is relatively more noticeable as compared to increase in lateral displacement.
|article #3169; publication #1050 (India2018)|