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DTSTART;TZID=Australia/Perth:20210901T180000
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UID:16313-1630519200-1630522800@australiantunnellingsociety.com.au
SUMMARY:Forrestfield Airport Link—Dundas Road tunnel incident and reconstruction using SGI segmental lining
DESCRIPTION:In person (Western Australia) and webinar \nSpeaker:\nAlvin Francis has 11 years of tunnelling experience working on a wide range of tunnel projects in challenging geology\, from Berapit Twin Tunnels- Electrified Double Track Project (Malaysia)\, Klang Valley MRT (Malaysia)- where the world’s first Variable Density TBMs specifically designed to handle the complex limestone karst zones were deployed\, North-South Transmission Cable Tunnel- 60m in depth in extremely hard Bukit Timah Granite (GI- GIII) (Singapore) and the Thomson Line tunnels T207 (Singapore). \nAlvin has been engaged as the Project Engineer for Tunnels\, on the Forrestfield Airport Link since 2017 and has completed the twin 6.7m diameter 7.5 Km Tunnel excavation works across 5 different geological strata with difficult & variable properties – alluvial sands to soft rock (2-4 MPa Sandy Siltstone/Claystone) using the Variable Density TBMs while tunnelling under the fully operational Perth Airport runways\, taxiways and aprons\, roads & local Railway Lines. Following the completion of Tunnelling and an unexpected incident at the Dundas Road Cross Passage\, he then worked on the Dundas Road tunnel reinstatement. \nTalk Outline:\nOn 22 September 2018 a leak developed during construction of the first tunnel cross passage\, Cross Passage Dundas\, into Tunnel One\, approximately 200m north of the Forrestfield Station site and the launching point for the TBMs. As a result\, water and silt entered rapidly into the tunnel at up to 60L/sec resulting in loss of ground around the tunnel and subsequently leading to the formation of a sinkhole at the surface alongside and partly beneath Dundas Road. The groundwater pressure\, and the associated lack of support to the tunnel lining\, caused permanent localised distortion to the tunnel shape and movement of the segments which make up the tunnel lining\, ultimately damaging a 26m-long section of Tunnel One (16 rings). This talk will briefly describe the setting\, the incident and then outline the technical solutions developed to enable reinstatement of the tunnel lining to achieve operational clearance and a 120-year design life using spheroidal graphite iron segmental lining (SGI). \nTeams link: Register for the Dundas Road tunnel incident webinar \nAt 5:30 pm\, finger food\, beer\, wine and soft drinks will be provided\, for an informal pre-talk get together at the venue. Come and meet your fellow professionals who are interested in tunnelling. The technical session will commence at 6 pm and run until approximately 7.00 pm. Dinner afterwards will be coordinated with the speaker at a nearby restaurant (pay your own way). \n 
URL:https://australiantunnellingsociety.com.au/ats-event/fal-to-dundas-road-tunnel-incident-and-reconstruction-using-sgi-segmental-lining/
CATEGORIES:Webinar,Western Australia
ATTACH;FMTTYPE=image/jpeg:https://australiantunnellingsociety.com.au/wp-content/uploads/2021/08/Dundas-resized.jpg
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DTSTART;TZID=Australia/Sydney:20210915T180000
DTEND;TZID=Australia/Sydney:20210915T193000
DTSTAMP:20260429T222401
CREATED:20210826T035446Z
LAST-MODIFIED:20210826T035446Z
UID:16327-1631728800-1631734200@australiantunnellingsociety.com.au
SUMMARY:Advances in soil conditioning technology used on Earth Pressure Balance Tunnel Boring Machines
DESCRIPTION:During tunnelling with Earth Pressure Balance Tunnel Boring Machines (EPB-TBMs) huge amounts of soil are removed for the tunnel construction with foams and polymers mixed in during excavation to modify its characteristics. This process\, which is directly linked to TBM performance\, is called soil conditioning and is an important factor in achieving a project’s target advance rate. \nThe potential environmental impacts of the soil conditioning regime also require close consideration\, as the conditioning agents can encounter underground water and remain in the excavation spoil for a period\, so repurposing of tunnel spoil depends upon the material being non-toxic\, a major commercial consideration. Soil conditioning products should therefore be selected for performance with minimal potential for environmental impact—considering their toxicity and biodegradability. \nJoin Richard Schulkins and Luke Foyster for an overview of soil conditioning fundamentals\, new environmentally friendly technology\, and learn from the shared experience of MAPEIs Underground Technology Team (UTT) on EPB projects worldwide\, including Europe’s largest EPB project—Santa Lucia in Northern Italy. \nSpeakers\nRichard Shulkins\n \nRichard has worked in the tunnelling industry since graduating from Camborne School of Mines in 1989. He has worked for Mapei since 2005 in sales and whilst he enjoyed working as a contractor\, he has come to realise that working in sales\, his knowledge base has risen as exponentially as his air miles. This is due to being called to projects worldwide in a problem-solving capacity. He is firmly of the belief that tunnelling is the most interesting and satisfying career choice he could have made. He is also leading a working group within ITA to provide guidelines on responsible disposal of tunnelling waste. \nLuke Foyster\n \nLuke Foyster is a third generation civil and mining engineer with seven years’ experience in underground works. Starting his career as an undergraduate on the Amaroo Main Sewer developed his keen interest in mechanised tunnelling. In his current position as Technical Engineer with Mapei’s Underground Technology Team\, Luke has been privileged to have an opportunity to expand his knowledge of construction products and materials while being trained at the Group’s headquarters in Milan\, Italy. By working with clients in Australia and New Zealand he has developed specialist knowledge in annulus grouting\, ground conditioning and TBM slurry additives\, while continuing to expand his knowledge in technologies for waterproofing\, ground consolidation and shotcrete. \n 
URL:https://australiantunnellingsociety.com.au/ats-event/advances-in-soil-conditioning-technology-used-on-earth-pressure-balance-tunnel-boring-machines/
CATEGORIES:New South Wales,Webinar
ATTACH;FMTTYPE=image/jpeg:https://australiantunnellingsociety.com.au/wp-content/uploads/2021/08/TBM-resiezed.jpg
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DTSTART;TZID=Australia/Sydney:20210923T130000
DTEND;TZID=Australia/Sydney:20210923T140000
DTSTAMP:20260429T222401
CREATED:20210913T044201Z
LAST-MODIFIED:20210913T050606Z
UID:16401-1632402000-1632405600@australiantunnellingsociety.com.au
SUMMARY:Building the Central Interceptor\, Auckland—Microtunnelling of the Link Sewers'
DESCRIPTION:The Australasian Society for Trenchless Technology is holding a webinar on the Central Interceptor project in Auckland\, and they have very kindly extended the webinar invitation to the ATS. \nThe ASTT is thrilled to be able to continue on with its webinars in 2021 and once again provide this free webinar in lieu of our popular trenchless forums which are presently suspended due to the Coronavirus restrictions. \nThe webinar will be a joint presentation by Stephen Grace and Chris McCarthny both from Watercare Services\, New Zealand. \nAbstract of presentation\nStephen and Chris will describe the project design and delivery of this major infrastructure\, and a progress report on the construction of the 2.1 to 2.4 metre link sewers by micro-tunnelling methods. \nThe Central Interceptor is a new deep tunnel sewer that will provide additional capacity in the network to meet planned population growth and development in Auckland\, provide a more resilient wastewater system\, and mitigate wet weather overflows in central Auckland. The project is an integral part of Watercare’s long-term strategy to effectively manage wastewater within the Auckland region\, to protect public health and the environment\, and to provide for growth. \nThe Central Interceptor tunnel is to be built between Grey Lynn and the Mangere Wastewater Treatment Plant over the next five years. The main tunnel will be approximately 14.6 kilometres long and up to 110 metres below the ground surface. It will cross under the Manukau Harbour approximately 15 metres below the seabed. The main tunnel will be excavated by tunnel boring machine and will have an internal diameter of 4.5 metres. In addition\, two separate link sewer tunnels ranging from 2.0 to 2.5 metres internal diameter and 1.1 to 3.2 kilometres in length respectively will be constructed by pipe jacking. Additionally\, there are 16 shafts and connecting sewers up to 78m deep that will divert flow into the tunnel. \nDate: Thursday 23 September \nTime: 1–2 pm EST \nZoom link: https://us02web.zoom.us/j/82913617021?pwd=TVcvWW1vR2U0TG11L1hCdWNnOWpEZz09 \nIf you experience difficulties in joining this free event\, then please email Jeff Pace\, ASTT Secretary on secretary@astt.com.au for assistance.\nAs an online attendee\, you will be able to attend the webinar from anywhere and will be able to submit questions that will be answered at the end of the presentation.
URL:https://australiantunnellingsociety.com.au/ats-event/building-the-central-interceptor-auckland-microtunnelling-of-the-link-sewers/
CATEGORIES:Webinar
ATTACH;FMTTYPE=image/jpeg:https://australiantunnellingsociety.com.au/wp-content/uploads/2021/09/ASST-resized.jpg
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