Construction of Torch Tower is progressing toward the development of a world-class supertall skyscraper, using proprietary construction technologies and site operations that take surrounding infrastructure into account. The article provides specific details on the technologies and initiatives central to its design and construction.
Construction of Torch Tower aims to create Japan's tallest supertall skyscraper while addressing a range of technical challenges, including construction in an area where transport networks are concentrated and the curved design of the low-rise façade. The construction plan calls for issues to be identified and verified in advance on an ongoing basis, with stronger collaboration among engineers to ensure safety and quality at the site.
In the technology section, a proprietary excavation technique that expands the tips of piles into a petal shape increases the bearing area to approximately twice the previous size, achieving a high bearing capacity capable of supporting approximately 10,000 tonnes per pile. The project also uses a proprietary construction method combining conventional sequencing in the central part of the site with top-down construction around the perimeter, balancing the need to secure working space and shorten the construction period while limiting the impact on surrounding infrastructure.
The structure, in which diagonal steel columns and beams around the perimeter form triangular frames, is presented as a design that combines seismic performance, which reduces vibrations caused by earthquakes and wind, with spacious interior areas. The site uses the Smart Control Center to centrally manage access and departures, safety, progress and surveillance footage in real time. The digital management platform supports safety and efficiency at the site.
The project also focuses on the transport and lifting of large materials, introducing elevators with one of the highest vertical transport capacities in Japan and four 1,050-tonne-class tower cranes. The cranes can lift 35-tonne materials at a working radius of 30 m and achieve a maximum hoisting speed of 180 m/min. These capabilities will contribute to higher productivity and smoother construction of the supertall skyscraper.
Overall, site operations aim to ensure that everyone, including the engineers, plays a central role. The project seeks to expand opportunities for younger engineers to gain experience and to build an organisation in which those involved can look back at completion and feel that they were glad to have participated in the project.