28 - 30 June, 2017 | Crowne Plaza Auckland, Auckland, New Zealand

Stephen Buttling


Principal
National Geotechnical Consulting


9:50 AM A Case History of a Piled Mat Foundation

This case history concerns three residential tower blocks, each of 70 storeys so over 200 m high, sited side by side on a mat foundation about 30 x 90 m and linked structurally at two levels. The mat was supported by 399 bored piles, following reasonable site investigation and testing, including an instrumented static load test and six dynamic load tests. 15 of the piles were then instrumented with vibrating wire strain gauges before forming the mat foundation, and these and the settlement of the mat were monitored during construction of the towers, with the settlement monitoring continuing for another 7 years after topping out. The settlement of the structure, and the way in which the loads were distributed and how this varied with time, will be shown. Recently numerical modelling has been carried out, and this has achieved excellent correlation with the measured data.

Key points to discuss:
  • Piled mat foundation (not piled raft)
  • Site investigation
  • Design of single piles and pile groups
  • Static load and dynamic pile testing
  • Instrumentation and monitoring
  • Foundation performance
  • Numerical modelling


Check out the incredible speaker line-up to see who will be joining Stephen.

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