Title:
A Sustainable Additive Manufacturing System for the Construction of New and Regeneration of Existing Tunnels
Author(s):
Andrea Marcucci
Publication:
Web Session
Volume:
ws_S23_AndreaMarcucci.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
4/2/2023
Abstract:
3DCP is appealing when applied to complex architectural shapes, though the structural behavior and geometrical size are limitations difficult to overcome. Upscaling the extrusion process to full sections, introducing a new concept of ultrafast adaptable slip-forming, is the access key to different sectors of the construction industry, as infrastructures. This paper will present the Extruded Tunnel Lining Regeneration (ETLR) technology developed by HINFRA with the scope to automatically regenerate the lining of existing damaged tunnels. “Tailored” features and issues of the aforesaid technology will be discussed in this paper, including performance of the employed fiber reinforced concrete mix together with a design validation related to a Fiber Reinforced Concrete (FRC) tunnel lining. A preliminary assessment of the environmental impact of the technology as compared e.g. to existing cast in place lining/retrofitting will also be presented as related to the saving in conventional reinforcement as well as to the expectable increase in productivity, as also based on preliminary results form a full scale trial testing site.