LATIN AMERICA | PROJECTS
Above left: CRCHI hard rock TBM at San Gawang hydro project, Peru PHOTO CREDIT: CRCHI Above right: Acciona is leading the concession for Line 6 of Sao Paulo metro PHOTO CREDIT: ACCIONA
CRCHI rapid success on hydro In late 2022, China Railway Construction Heavy Industry Corporation‘s (CRCHI) first hard rock TBM in South America added to its milestone achievements by achieving an advance of more than 1000m (1093yd) in a month, boring on the San Gawang hydropower project, in Peru. The high progress rate for the month came from
increasingly higher single shift advance rates achieved for the 5.83m-diameter (19.12ft) TBM through November, resulting in the milestone 1000m monthly rate to be exceeded – reaching 1007.9m (1102.2yd) – by 6 December. Geology is medium to high strength rock with good
stability, says CRCHI, which supported the TBM assembly and commissioning with its onsite service team. Progress rates on shifts doubled from 10m to 20m (32.8ft to 65.6ft) and then higher during November, the company reports. CRCHI adds that the maximum progress rates achieved on a single shift was more than 26m (85.3ft). The maximum advance in a day was 46m (150.9ft) The 209MW hydro project has Chinese investment as
part of its Belt and Road Initiative, in South America. CRCHI says the San Gawang hydropower project is
expected to greatly promote the optimal allocation of regional water resources in support of sustainable economic and social development in the region. The project is the first power sector investment in Peru by Chinese enterprises, says CRCHI.
BRAZIL – SAO PAULO CREG machine set for Line 2 China Railway Engineering Equipment Group (CREG)’s large earth pressure balance machine (EPBM) for Sao Paulo metro’s Line 2 extension has passed its factory acceptance test (FAT) at Pinghu General Assembly Base, in Zhejiang Province, China.
With a diameter of 11.7m (38.4ft), the machine –
‘CREC 1207’ – is CREG’s first export of a shield machine to South America. The extension to Sao Paulo Metro Line 2, which
will connect Vila Predente station and Penha station, comprises total tunnel excavation of 6.5km (4 miles). The geology is mainly sand, silt and clay, and large
gravel and rocks are also present. To address the project’s tunneling challenges, the
EPBM features double articulation and a large transition cabin, says CREG. The machine carries an automatic zero assembly
system to ensure the safety and stability of long- distance tunneling.
Acciona takes on Line 6 concession Acciona, which has also worked on Line 2, in late 2020 signed a contract to join and run the concession team for Line 6 of Sao Paulo metro – one of the biggest Public-Private Infrastructure (PPP) transport infrastructure projects in South America. Work had been at a standstill on the ‘Orange Line’
concession – Line 6 – since 2016. The line will include 15 metro stations over a 15km-long (9.3 miles) route. Acciona signed the agreement to transfer the
concession, along with Brazilian consortium MOVE, which was previously in charge of the project. The new Acciona-led consortium, Concessionaria Linha Universidade, got the construction work going again. Concession activities will also include operation and maintenance. At takeover, the anticipated construction period was
approximately five years and that would be followed by 19 years of O&M under the concession deal. The concessionaire currently has two TBMs boring
on the project to excavate a total of 12.4km (7.7 miles). The machines are due to complete their drives at the end of 2024.
Spring 2023 | 19
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