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Technical Paper: Stiffness parameters for the foundation design of The Landmark tower

by Jonathan Dewsbury, Buro Happold/University of Southampton. This paper was first published in GE’s May 2012 issue.

Introduction

This paper reviews the selection of stiffness parameters used for the foundation design of The Landmark building, by comparing the results from numerical modelling with monitored settlement data. In doing so the role of single pile load tests in determining the stiffness parameters for design is assessed.

The Landmark is a 330m tower on the Corniche in Abu Dhabi (Figure 1). It consists of five storeys of basement and 72 storeys above ground. It is supported on a pile assisted raft (Figure 2) consisting of 34 piles, each 14m long with a diameter of 1.5m.

This paper initially details the geology, engineering properties, and the design parameters used for The Landmark. Stiffness profiles are then back-figured from two single pile load tests using a numerical model. The stiffness profiles backfigured from the pile load tests were used in a numerical model of the piled raft to ascertain if they provided a good prediction of the monitored piled raft settlement.

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