Assessment of Earthquake Induced Lateral Displacements at Transpower Hayward HVDC Link Pole 3Upgrade

  • Ian McPherson
Conference paper
Part of the Sustainable Civil Infrastructures book series (SUCI)


Transpower New Zealand Ltd owns and operates the High Voltage Direct Current (HVDC) link which transfers power between the North and South Islands of New Zealand. The link is a critical lifeline in the electrical distribution system. Transpower proposed upgrading the Haywards facility at the north end of the HVDC link from 700 MW to 1200 MW. The development included construction of a new convertor station (the Pole 3 building) which was located within 150 m of the active Wellington Fault. This fault could generate a Magnitude 7.3 earthquake with a 1 in 2,500 year return period peak ground acceleration of 1.01 g. The terrain in the area of the substation is relatively steep and the site was developed by cutting into higher ground and placing the material as un-engineered fill into the gullies. The new Pole 3 building straddles the cut fill interface with rock at shallow depth at one end and up to 25 m of uncontrolled fill at the other end. A key geotechnical design issue was to assess how far the underlying fill could move in the design earthquakes so that the base isolators in the new building could be designed. This paper outlines the analytical methods to assess likely lateral fill movements.



I would like to acknowledge Transpower and Siemens who gave permission for this paper to be published. Thanks also go to Ian Brown for his help in 3d modelling, Dominic Mahoney who carried out the finite element modelling and Robert Kamuhangire for his editing prowess.


  1. Ambraseys, N.N., Menu, J.M.: Earthquake induced ground displacements. Earthq. Eng. Struct. Dyn. 16, 985–1006 (1988)CrossRefGoogle Scholar
  2. Bray, J.D., Travasarou, T.: Simplified procedure for estimating earthquake induced deviatoric slope displacements. J. Geotech. Geoenviron. Eng. 133(4), 381–392 (2007). ASCECrossRefGoogle Scholar
  3. GNS, McVerry, G.H.: Recommended accelerograms and vertical spectra for Haywards, GNS report 2007/362 (2007)Google Scholar
  4. Kramer, S.L.: Geotechnical Earthquake Engineering. Prentice Hall, Upper Saddle River (1996)Google Scholar
  5. NZGS/DSIR Beetham, R.D., Fellows, D.L.: Haywards site inspections – a seismic hazard and full stability evaluation, DSIR report EGI 87104 (1987)Google Scholar

Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.Ground Engineering Aurecon New Zealand LimitedWellingtonNew Zealand

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