PROJECTS | LATIN AMERICA
LATIN DRIVES
A variety of tunneling projects in Latin America are meeting key milestones in their progress, and TTNA takes a brief look at a few, in Peru and Brazil
Two tunnelling projects in each of Peru and Brazil give a sample of the major construction works currently underway in Latin America. Of the four project briefly under the spotlight, three
are for metro tunnels and one is for hydro. Two of the metro lines are in the same city – Sao Paulo. All involve major international participation.
PERU
Lima metro breakthrough – Line 2 The TBM boring Line 2 of Lima’s expanding metro recently broke through at Buenos Aires station in the port of Callao. The Herrenknecht TBM, named ‘Micaela’, is one of two
machines that the construction consortium of Webuild, Dragados, FCC and Cosapi is using on the project. The 148m-long (161.8yd) machine has a 10.27m-diameter (33.7ft) and is designed for the groundwater soils in the area. It has excavated around 1000m3
(1308yd3 ) per day
and achieved an average daily advance of 15m-20m (49.2ft – 65.6ft). TBM ‘Micaela’ bored 2km (1.24 miles) of tunnel
from Insurgentes Station to Buenos Aires station, and is underway towards Puerto del Callao, where it is expected to arrive before mid-2023.
On completing this route, it is to be transferred to
Gambetta station to excavate and build the 8km-long (5 miles) branch line. The construction consortium’s second TBM on the
project is named ‘Delia’ and is designed to excavate in dry ground conditions. More than a year ago, the TBM completed the first section of the project, breaking through at Circunvalación station. The TBM has bored 3km (1.86 miles) of tunnel from
San Juan de Dios station to 28 de Julio station, in the eastern part of Lima, and will continue excavating to Parque Murillo station in the city center. It is to end its work at Insurgentes, in Callao. The US$3bn Line 2 metro project involves the
excavation of a 27km-long (16.78 miles) tunnel to connect the ATE and Callao districts, and the construction of the 8km-long (5 miles) branch to Jorge Chávez International Airport, forming the first phase of Line 4. The new line also includes construction of 37 stations, 36 ventilation and emergency shafts, and two train depots. So far the construction consortium has completed
14km (8.7 miles) of tunnel – only some by TBM. The first 9km (5.6 miles) from Municipalidad de Ate station to San Juan de Dios station were built using NATM.
Above: Lima metro Line 2 breakthrough for TBM ‘Micaela’ PHOTO CREDIT: WEBUILD 18 | Spring 2023
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