This paper was prepared for the NZGS 2020 Symposium and will be presented at the rescheduled meeting ABSTRACT Sumner Road between Lyttelton to Evans Pass was severely affected by rockfall as a result of the 2010-2011 Canterbury Earthquake Sequence. Approximately 2 km of Sumner Road…
ABSTRACT Following the 2010-2011 Canterbury Earthquake Sequence a Royal Commission of inquiry provided approximately 200 recommendations to the Ministry of Business, Innovation & Employment (MBIE). Of these, over thirty were specific to geotechnical engineering. The royal inquiry recommended that MBIE work with industry to improve…
Abstract Christchurch City and its surrounds experienced a series of damaging earthquakes in 2010 and 2011. During the 22 February 2011 earthquake, extensive cracking and movement of the ground occurred in some areas of the Port Hills. We have used a geological modelling package, Leapfrog3D®,…
The Canterbury region experienced widespread damage due to liquefaction induced by seismic shaking during the 4 September 2010 earthquake and the large aftershocks that followed, notably those that occurred on 22 February, 13 June and 23 December 2011. Following the 2010 earthquake, EQC directed a thorough investigation of…
The potential for systematic variations in SPT N –values between mud rotary and sonic drilling methods has been the focus of a pilot investigation at a site that exhibited extensive liquefaction during the 22 February 2011 M 6.3 Christchurch Earthquake. In an attempt to quantify…
This paper reviews predictions of ground settlement due to post-liquefaction volumetric consolidation, and compares these predictions to ground damage observed from the Canterbury Earthquake Sequence in selected areas of Christchurch with differing ground conditions. While ground settlement due to volumetric consolidation is only one component…
The 2010 Darfield and 2011 Christchurch Earthquakes triggered extensive liquefaction-induced lateral spreading proximate to streams and rivers in the Christchurch area, causing significant damage to structures and lifelines. A case study in central Christchurch is presented and compares field observations with predicted displacements from the…
Seismic activity during the 2010/2011 Canterbury Earthquake Sequence (CES) caused widespread damage to sloping ground in residential areas on the Port Hills in Christchurch. Much of the damage manifested as cracking and displacement of the ground surface. While actions were taken to repair some damage, it was largely…
This paper describes the development of a new depth weighted assessment methodology, which produces a dimensionless number termed the Liquefaction Severity Number (LSN), to assess vulnerability of land to liquefaction-induced damage. This methodology has been developed by comparing measured attributes from the properties damaged by…
Several methods are available in the literature to estimate the extent of liquefaction induced lateral spreading at a given site, the most commonly used being that of Zhang et al (2004). During the 2010-2011 sequence of earthquakes in Canterbury, lateral spreading occurred extensively across the…
