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Open AccessArticle

Effect of Water Drawdown and Dynamic Loads on Piled Raft: Two-Dimensional Finite Element Approach

School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia
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Infrastructures 2019, 4(4), 75; https://doi.org/10.3390/infrastructures4040075
Received: 30 June 2019 / Revised: 25 November 2019 / Accepted: 2 December 2019 / Published: 7 December 2019
(This article belongs to the Special Issue Seismic Resilient Infrastructures)
The piled raft foundations are widely used in infrastructure built on soft soil to reduce the settlement and enhance the bearing capacity. However, these foundations pose a potential risk of failure, if dynamic traffic loading and ground conditions are not adequately accounted in the construction phase. The ground conditions are complex because of frequent groundwater fluctuations. The drawdown of the water table profoundly influences the settlement and load sharing capacity of piled raft foundation. Further, the dynamic loading can also pose a potential risk to these foundations. In this paper, the two-dimensional finite element method (FEM) is employed to analyze the impact of water drawdown and dynamic loading on the stability of piled raft. The seismic response of piled raft is also discussed. The stresses and deformations occurring in and around the raft structure are evaluated. The results demonstrate that water drawdown has a significant effect on the stability and seismic response of piled raft. Various foundation improvement methods are assessed, such as the use of geotextile and increasing thickness of the pile cap, which aids of limiting the settlement. View Full-Text
Keywords: piled raft; drawdown; dynamic loads; finite element analysis piled raft; drawdown; dynamic loads; finite element analysis
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MDPI and ACS Style

Meena, N.K.; Nimbalkar, S. Effect of Water Drawdown and Dynamic Loads on Piled Raft: Two-Dimensional Finite Element Approach. Infrastructures 2019, 4, 75.

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