The Leachable Deposits Formation Project is part of the Toquepala mine modernization plan. The primary structure is the Crushing Building, which has the mission of crushing the large volumes of minerals hauled to the building. The Primary Crushing building stands 41 m tall and covers a surface area of 390 m2. The crushing building was divided into two zones: the primary zone includes the main slabs (three total) and is divided into four levels, while the secondary zone includes the auxiliary slabs (four total) and is divided into four levels. The Primary Crusher also included the 41 m high cut-off wall construction with total slurry wall surface area of 1,800 m2. Approximately 7,000 m3 of concrete was poured in the crusher building.
The difficulty of propping the building’s cantilevers was confronted during the last phase of the construction process (last main slab).This difficulty derived from the impossibility of shoring up the structure from the ground level because of the daily process of filling and compacting material that was being executed in the rear of the crusher. Shoring from ground level would require stopping the earth filling and compacting process. For that reason, the alternative of using steel profiles as the necessary base and platform to support the shoring that in turn would support the cantilever of the building’s third main slab while propping with the BRIO System, eliminating the need to do this from the ground, was analyzed.Additionally, the walls were considerably wide (on average 1.50 m), and the wall heights varied between 3.95 and 13.43 m.Another interesting factor was that of the wide slabs that had to be shored: 2.18 m - 1.20 m thick with floor slabs of height 8.21 m - 9.62 m. The cut-off walls were 41 m tall and had to be constructed in various pour phases.
ORMA: Formwork for the First Crusher Walls
COMAIN: Formwork for the auxiliary slab beams
2000 CONSOLE: Support to climb the formwork on walls (Orma), which are made in various phases
BRIO: Support (Shoring) for the primary and secondary slabs
Three Layer Panels: Formwork in Bottom of Slab
