n mechanics Z Geo june 2011 issue 81 n n Z Geomechanics news ews Newsletter of the New Zealand Geotechnical Society Inc. ISSN 0111–6851 ■ Christchurch earthquake 22.2.2011 www.nzgs.org Christchurch earthquake ■ Foundation Grouting 22.2.2011 Foundation Grouting ■ Muldoon’s Corner Realignment Muldoon’s Corner Realignment Cyclone Wilma Damage 14th Geomechanics Lecture ■ Cyclone Wilma Damage BEFORE AFTER june 2011 issue 81 NZGS NZGSJunecv.indd 1 25/05/14 12:04 pm AVALON // ROPE ACCESS SERVICES NEW ZEALAND GEOMECHANICS NEWS CONTENTS JUNE 2011, ISSUE 81 58 82 90 Chairman’s Corner ............................................ 2 Photo Competition ......................................... 71 Editorial ................................................................ 3 Q & A with EQC Field Office Staff ................ 73 Personal Observations, Alun Davies ................. 76 Letters to the Editors .......................................... 4 Emergency Rockfall Remediation ................... 79 Editorial Policy .................................................... 5 Geotech input in USAR teams ....................... 84 The Secretary’s News ........................................ 6 Project News International Society Reports Cyclone Wilma Engineering Assessments ......... 85 IAEG .............................................................. 7 Kaeo and Tauranga Bay Flood Mitigation ........ 86 ISSMGE .......................................................... 8 SH2 Rimutaka (Muldoon’s) Corner ............. 88 ISRM ............................................................ 14 Case Study – Terramesh Barriers .................. 91 NZGS Branch Activities..................................... 18 Technical Articles Newmarket Viaduct Grouting ......................... 92 Standards, Law and Industry News Update on the Professional Registration Book Review of Engineering Geologists .............................. 24 Rudolph Glossop and the Rise of IPENZ Forum 2011 ...................................... 25 Geotechnology .............................................. 98 NZGS Young Geotechnical Professionals ......... 26 Company Profile Fellows of IPENZ ........................................... 28 CLL, Contract Landscapes ............................... 99 Warwick Prebble retirement ............................ 29 AECOM ..................................................... 104 Awards Foreign Correspondent NZGS Scholarship ......................................... 30 Peter Jenner – Africa .................................... 106 2011 Geomechanics Lecture, David Bell ......... 31 NZGS Student Award .................................... 32 Member Profiles Gavin Alexander, Beca ................................. 108 Conference Reports Hamish Maclean, Tonkin & Taylor .............. 109 14th Australasian Tunnelling Conference 2011 .... 34 Ninth Pacific Conference on Earthquake Past Member’s Contribution Engineering .................................................... 36 NZGS Chairman 1995 .................................. 110 Special Feature: 2011 Christchurch EQ ........ 38 IPENZ fact sheets ........................................... 42 Geotech Teaser 111; Events Diary 112; December Crossword answers 113; Information 114; Advertisers Seismic Data for the 22 Feb 2011 Earthquake .... 48 Directory 115; Membership 116; NZGS Inc. Landslides and related ground damage ............ 53 Publications 118; Advertising Information 119; Geosynthetic Structures................................... 68 Geotech Crossword 120. Cover images: thanks to G.Hancox (GNS), URS, Tonkin & Taylor New Zealand Geomechanics Neewsws CHAIRMAN’s CORNER WELCOME TO THIS issue of NZ Geomechanics News, the David is an engineering geologist first under the new editorial leadership of ‘senior’ co-editor at AECOM NZ (formerly Paul Salter ably assisted by Hamish Maclean. The Society Maunsell and prior to that, Worley owes a great deal of thanks to Kate Williams as co-editor Consultants). He has a masters over the past five years; Kate’s appetite for hard work and degree in Earth Science from the vision has seen Geomechanics News grow in the quality University of Waikato and has of both the magazine’s content and production values. A been practicing in the fields of truly sterling effort. Paul and Hamish have continued that engineering geology and geotechnical standard with the current issue. and civil engineering for 30 years. Projects have taken him to many out-of-the-way places in the NZGS Management Committee Asia-Pacific region, as well as the length and breadth of New The value of the role of Vice-chair was made clear to me Zealand. Particular areas of interest are the volcanic geology of over the past two years while working with our immediate the North Island and Indonesia, natural hazard assessment, and Past Chair, Phil Robins. It was a privilege to work with civil engineering projects such as hydroelectric and transportation Phil and I hope to continue the initiatives he championed developments, particularly the early stages of site reconnaissance while Chairman. Phil will continue in his ex-officio role and feasibility assessment. of immediate Past Chair and he will represent NZGS on the organising committee for the 2012 Melbourne ANZ conference. The committee has two new members who were The next (19th) NZGS Symposium is tentatively set elected earlier this year. Welcome to Gavin Alexander from down for 2013 in Queenstown. With other conferences Auckland and Tony Fairclough in Christchurch. Gavin has and events squeezing the calendar in recent years we have taken on the roles of Vice-chair and Treasurer. I would like not had a symposium since the September 2008 event in to record my appreciation for the efforts and commitment Auckland. More details will emerge through the course over the past 2½ years of outgoing committee member of this year. David Stewart. A Young Geotechnical Professionals conference was Erica Cammack has taken over the role of Young scheduled for this year in Australia; however the status of Geotechnical Professionals representative from Kate the event is a little unclear at present, but it is likely that it Williams. Thanks again Kate and welcome Erica. will now be held in 2012 at about the time of the ANZ conference. Further updates will be circulated to members Canterbury Earthquakes and posted on the website when available. With the establishment of the Canterbury Earthquake Recovery Authority, activity in and around Christchurch Geomechanics Lecture will now move into a new phase. Emphasis for the Society The Committee is very happy to announce that Dave will be to ensure that members’ views and opinions are Bell of Canterbury University’s Geology Department will well represented in any reviews of engineering statutes, deliver the 14th Geomechanics Lecture throughout New standards and codes being promoted under the auspices Zealand this year. Further details of this prestigious award of CERA. The objectives and content of the NZGS can be found in this edition of Geomechanics News. Seismic Guidelines modules will also be reviewed by the Also in this edition is an announcement of a call for Committee to ensure that they include consideration nominations for the Geomechanics Award. This recognises of the earthquakes’ lessons. The second module of the an outstanding published contribution to the development guidelines (retaining walls) is currently being prepared by of geotechnical engineering in New Zealand. The award a subcommittee led by Dr CY Chin and a third, covering was last presented in 2008. slopes, is being considered by the committee. Conferences David Burns Congratulations to Misko Cubrinovski for securing the Chair, NZGS hosting of the 6th International Conference on Earthquake [email protected] Geotechnical Engineering, to be held in Christchurch in 2015. The Committee has offered its support to the organisers of the conference and we look forward to a repeat of last year’s very successful IAEG Congress. 2 Newsletter of the New Zealand Geoteecchnical SocietySociety Inc.Inc. New Zealand Geomechanics News EDITORIAL Paul is an Engineering Geologist and Hydrogeologist at URS A SPECIAL FEATURE on the Mw 6.3 Christchurch Auckland. He studied Engineering Earthquake of 22 February dominates this issue, as it should Geology at Auckland University for an event that has cost many lives and devastated the and after completing his MSc centre of our second biggest city. It is little comfort that, in 1993 worked for Earthtech technically, this was an aftershock of September’s Mw 7.1 Consulting for 3 years. Since then Darfield Earthquake and that the possibility of such a quake he has worked for URS, including was known (a Mw 7.3 aftershock occurred 10 days after 6 years in their Santa Ana, California office. He currently leads the Mw 7.9 Napier EQ in 1931). the URS Auckland Geotechnical Team. It was the unfavourable location and unusually strong ground motions - the strongest ever recorded in NZ - that contributed to this chaos. We have reprinted some of the Hamish is a Geotechnical Engineer raw seismic data, and spectra analysis by Graeme McVerry with Tonkin & Taylor Ltd in of GNS, which show the ground motions in the CBD Auckland. He completed his far exceeding the design motions for most buildings. An Civil Engineering degree at The excellent paper by Graham Hancox and others at GNS University of Auckland. Following focuses on the landsliding and related ground damage valuable construction experience around the Port Hills caused by this strong shaking