{"id":3217,"date":"2019-12-10T14:52:10","date_gmt":"2019-12-10T14:52:10","guid":{"rendered":"http:\/\/www.www.geoquest-group.fr\/?post_type=avada_portfolio&p=3217"},"modified":"2021-07-09T08:26:12","modified_gmt":"2021-07-09T08:26:12","slug":"transmission-gully-project","status":"publish","type":"avada_portfolio","link":"https:\/\/www.geoquest-group.fr\/en\/reinforced-earth\/transmission-gully-project\/","title":{"rendered":"TechSpan\u00ae and Reinforced Earth\u00ae for complex road project"},"content":{"rendered":"

Geoquest Ltd New Zealand Provides Reinforced Earth\u00ae Wall and Eleven Bridge Abutments, TechSpan\u00ae Arch with Seismic Design<\/span><\/p><\/h1><\/div>

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When completed, in May 2020, the Transmission Gully Motorway Project<\/a> (TGP) will provide a new, 27-km-long, four-lane highway north of Wellington, New Zealand. This modern and safe main highway will bypass the coastal communities and space-limited choke points which resulted in ever increasing traffic congestion on the existing SH1 highway.<\/p>\n

The project is highly complex, with the alignment in places crossing steep, difficult, terrain and in other places crossing flood plains with deep, soft foundation soils. For much of its length the alignment is close to the active Ohariu fault. Twenty-five new bridges and large culverts are required over the length of the alignment. Many of the bridges are single span structures, with spans ranging from 22 m to 38 m.<\/p>\n

The Wellington Gateway Partnership (WGP) and the New Zealand Government formed a Public Private Partnership (PPP) to deliver the Project. The WGP subcontracted the Design and Construction of the Project to a Joint Venture between CPB Contractors Pty Ltd and HEB Construction Ltd<\/a> (a VINCI subsidiary), known as CPB HEB JV.<\/p>\n

CPB HEB JV contracted Geoquest Ltd New Zealand<\/a> for the design and supply of materials for 10 bridge abutments<\/a> using the Reinforced Earth\u00ae<\/a> technique.
\nGeoquest considered in the design the proximity to the active Ohariu Fault with an effective magnitude of 7.<\/p>\n

After the contract was signed, Geoquest Ltd was awarded two further structures: abutments for a further single span bridge and a TechSpan\u00ae<\/a>\u00a0concrete arch system with extensive, associated Reinforced Earth\u00ae Walls.<\/p>\n

The abutments for the eleven single span bridges required a total of about 8,500 m2 of TerraClass\u00ae precast concrete facing panels, with the height of the walls varying between 1.6 m and 10.7 m.
\nThe TechSpan\u00ae arch has a nominal span of 14 m with a height of 6.8 m. Associated Reinforced Earth\u00ae portal walls comprised 2,100 m2 of TerraPlus\u00ae precast concrete facing panels up to a maximum height of 16.8 m.<\/p>\n

Construction of the first set of Reinforced Earth\u00ae Abutments began in July 2017, with all Reinforced Earth\u00ae structures substantially complete in October 2019.<\/p>\n<\/div>

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Geoquest brochure<\/span><\/a><\/p>\n<\/div><\/div><\/div>

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Precastarches<\/span><\/a><\/p>\n<\/div><\/div><\/div>

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