Work is currently underway to update the NZTA Bridge Manual (BM) based on recent advancements in bridge design practice in New Zealand and worldwide, and also the NZTA’s experience on the performance of bridges during the Canterbury earthquakes. In the current 2nd edition of the BM various…
Contents: A review of static earth pressure theory (JP Blakeley) Dynamic pressure on earth retaining structures (GL Evans) Comments on earthquake-induced soil pressures (JH Wood) An introduction to the MWD retaining wall design notes (JC Rutledge and A Kennaird) The practising engineer’s viewpoint (GA Pickens)…
This paper presents a summary of land damage observed in the Port Hills of Christchurch, New Zealand, following the earthquake sequence of 4 September 2010, in particular the land damage associated with a period of high seismic activity which commenced in February 2011. The earthquakes…
In pseudo-static analysis, the Mononobe-Okabe (M-O) solution is typically applied to determine seismic earth pressures acting on retaining walls where resulting displacements are relatively large. These equations require the input of a horizontal seismic coefficient which is frequently chosen to be equivalent to the free-field…
This paper presents a brief case study investigating the performance of the Kalamata quay wall that exhibited permanent displacement following a Mw 5.9 earthquake. The aim of the investigation was to attempt to predict the observed damage to the wall using available analysis techniques – chiefly simplified analytical…
Berth 3, an extension to Northport Ltd’s Marsden Point wharf facility, comprises a twin sheet pile wall to provide support to the new wharf deck and retain the adjacent reclamation. The wall type was selected to enable construction to proceed by walking a crane over…