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NZ NZ GEOMECHA JUNE 2014 issue 87 N ICS NEWS ICS E N WS NZBulletin of the GEOMECHA New Zealand Geotechnical Society Inc. NICSISSN 0111–6851 ■ Ground Improvement Ground Mackays to ■ Tauroa Subdivision Tauroa Peka Peka Expressway ■ Mackays to Peka Expressway issue 87 JUNE 2014 NZ GEOMECHANICS NEWS EWS N 6851 ICSISSN 0111– GEOMECHA N NZBulletin of the New Zealand Geotechnical Society Inc. ■ Ground Improvement Mackays to ■ Tauroa Subdivision ■ Peka Peka NZGS Life Member and IPENZ Awards Expressway ■ Mackays to Peka Peka Expressway ■ NZGS Life Member and IPENZ Awards SEARCH NZGS at yOUR tauroa subdivision ground improvement App nzgs life member and ipenz awards JUNE STORE 2014 Back issues now free online check out www.nzgs.org issue 87 30/05/14 12:04 pm NZGS TAUROANZGS_june14cv4.indd 1 SUBDIVISION june GROUND IMPROVEMENT 2014 issue 87 NZGS LIFE MEMBER AND IPENZ AWARDS NZGS Back issues now free online check out www.nzgs.org Our multidisciplinary operation specialises We’re proud to be the sole distributor in the fields of ground anchoring, soil in New Zealand for SAMWOO Anchor nailing, drilling, post-tensioning and Technology, BluGeo GRP Powerthread K60 RETAINING YOUR BUSINESS grouting. The combination of capability Bar, Tighter (Kite) Earth Anchors and Grout and depth of technical expertise makes Grippa Grout Sock (Australasia). us a market leader and supports our IS OUR BUSINESS. reputation for providing value engineered solutions to our customers. Over more than 40 years, Grouting Services has delivered We’re experts in: some of New Zealand’s most significant Ground Anchoring, Soil Nailing, Micro-Piling and Post-Tensioning contracts. a Ground Anchoring Reflecting a strategy of continual The drill rig is able to operate all rotary improvement, we are pleased to and/or rotary percussion drilling systems a Soil Nailing announce the arrival of our latest and the advanced manoeuvrability specialist drilling rig, the Comacchio allows for a wide range of drilling MC400 MP proprietary hydraulic positions to be achieved. a Grouting crawler-mounted drill rig with remote hydraulic power pack. It is especially We have already completed several a Post-tensioning designed for specialised work in narrow projects with the rig installing seismic spaces, inside buildings / basements tension anchors & tension/compression and small tunnels and therefore well micro-piles in areas with both restricted a Drilling suited to micro-piling applications. access and low headroom. a Seismic Upgrade If you’re interested in working with us or finding out more about the results we’ve achieved for our clients call 09 837 2510 or visit our website. Functionality Low Headroom Restricted Access Versatility Phone 09 837 2150 | www.groutingservices.co.nz Our multidisciplinary operation specialises We’re proud to be the sole distributor in the fields of ground anchoring, soil in New Zealand for SAMWOO Anchor nailing, drilling, post-tensioning and Technology, BluGeo GRP Powerthread K60 RETAINING YOUR BUSINESS grouting. The combination of capability Bar, Tighter (Kite) Earth Anchors and Grout and depth of technical expertise makes Grippa Grout Sock (Australasia). us a market leader and supports our IS OUR BUSINESS. reputation for providing value engineered solutions to our customers. Over more than 40 years, Grouting Services has delivered We’re experts in: some of New Zealand’s most significant Ground Anchoring, Soil Nailing, Micro-Piling and Post-Tensioning contracts. a Ground Anchoring Reflecting a strategy of continual The drill rig is able to operate all rotary improvement, we are pleased to and/or rotary percussion drilling systems a Soil Nailing announce the arrival of our latest and the advanced manoeuvrability specialist drilling rig, the Comacchio allows for a wide range of drilling MC400 MP proprietary hydraulic positions to be achieved. a Grouting crawler-mounted drill rig with remote hydraulic power pack. It is especially We have already completed several a Post-tensioning designed for specialised work in narrow projects with the rig installing seismic spaces, inside buildings / basements tension anchors & tension/compression and small tunnels and therefore well micro-piles in areas with both restricted a Drilling suited to micro-piling applications. access and low headroom. a Seismic Upgrade If you’re interested in working with us or finding out more about the results we’ve achieved for our clients call 09 837 2510 or visit our website. Functionality Low Headroom Restricted Access Versatility Phone 09 837 2150 | www.groutingservices.co.nz CONTENTS 04 Chairman's corner 05 Editorial News news in BRIEF 06 A Series of Short News Items PROJECTS 14 MacKays to Peka Peka Expressway 17 Christchurch Polytechnic Institute of Technology Ground Improvement 20 Design Efficiency: Ground Improvement with Uplift Resistance 26 Re-levelling Residential Properties using Low Mobility Grout (LMG) 30 Academic News Technical 40 40 Improvement Mechanisms of Stone Columns as a Mitigation Measure Against Liquefaction-induced Lateral Spreading 48 Malcolm Bolton’s Rankine Lecture & Stress-strain Properties of Auckland Residual Soil 50 Why Does Critical State Soil Mechanics Not Work for Auckland Residual Soils? 54 Tauroa Residential Subdivision: Landslide Remediation and Hill Slope Stabilisation for Earthquake Resistance 64 Optimising Pavement Design for Local 17 22 Conditions Reviews Society BOOK 88 NZGS Honours Life Member 70 Rock Engineering Design, Properties and 88 IPENZ Fellows Applications of Sound Level 90 NZGS Submission on IPENZ and CPEng Code of Ethics CONFERENCE 94 2014 NZGS Scholarship Recipients 72 International Symposium on Design and 95 New Zealand Geotechnical Society Practice of Geosynthetic Reinforced Soil Student Awards Structures 98 International Society Reports 08 100 NZGS Young Geotechnical Profiles Professionals COMPANY 101 Branch Reports 76 GeoSolve 103 Branch Coordinators 79 Jacobs 105 Management Commitee List, Editorial Policy, Subscriptions 81 Photograph Competition 106 NZGS word, Advertising, Membership 107 Around the Office OBITUARY 108 National and International 82 Professor A.W. Bishop Events COVER IMAGE: 15 meter section of a Totara log found in the peat at Peka Peka. The log has been given back 30 to local iwi, Te Atiawa and is now being carefully dried out for future carving. Photographer Mark Coote. June 2014 • NZ Geomechanics News 3 chairman’s CORNER Considerable EFFORt CONTINUES to Planning for the next joint ANZ be put into the running of our Society and conference to be held in Wellington in into contributions to the wider profession. early 2015 is well advanced, with 290 The workload of your Committee and abstracts submitted to date. There are many other volunteers continues to exceed still a number of sponsorship spots the time that people are able to make available, and I encourage you to make available, and I would like to thank all who the most of this opportunity to showcase provide a great deal of their discretionary your organisation to a truly Australasian Gavin has specialized in time to contribute to our Society. I have set audience. geotechnical engineering out the highlights from the last six months Later in 2015, the 6th International since graduating from below. Conference in Earthquake Geotechnical Auckland University in Engineering will also require our support. the mid 1980’s. Following INTERNATIonal REPRESENTATION Misko Cubrinovski is leading a strong team graduation, he spent Mick Pender, our local ISSMGE Liaison, has of volunteers to organising this. seven years with Arup been asked to join the ISSMGE Technical Geotechnics in the UK Oversight Committee. This is a great SEISMIC GUIDELINES and Australia working honour for Mick, and reflects his high Work on the first three modules of the on large building and standing in the international soil mechanics Geotechnical Earthquake Engineering infrastructure projects. In community. It will allow him to help shape Practice continues (review of the existing that period Gavin spent a the future technical work programmes of Liquefaction module, and writing of year at Imperial College, the many Technical Committees of that guidelines on Foundation and Retaining London and was awarded society, and will keep him at the forefront Wall design) but at a frustratingly slow an MSc and DIC in Soil of new thinking in his field. pace, with the result that MBIE has now Mechanics and Engineering Stuart Read, our local ISRM Liaison, has overtaken our efforts and produced its Seismology. been nominated as the next Regional Vice own version of a retaining wall design President of that society. Providing his guideline for residential development. Gavin Alexander nomination is accepted, Stuart will take up While a somewhat inevitable consequence Chair, Management this role in 2015. of relying on well intentioned specialist Committee Ann Williams completes her four year practitioners in the most in-demand sector term as Regional VP for IAEG later this of our membership, we really do need to .................................................................................................................... year. Following hard on the heels of the give this the upmost focus. There are some Convenor role for the IAEG Congress in initiatives being talked about, but if any of 2010, Ann has invested a huge effort in that you have a strong interest in these areas Association over a considerable period and have some time to contribute, please of time. Thanks Ann, your enthusiasm get in touch with me. We’ve
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