The invention discloses a construction method of a concrete inner formwork
supporting system for an ultra-large wind tunnel
diffusion section. The construction method comprises the steps that S1, full-
simulation modeling is conducted on a runner structure and a steel formwork according to a construction drawing by means of the BIM technology; s2, after
processing by a factory, re-checking and splicing the steel templates by using BIM data, and pasting two-dimensional codes, and S3, carrying out on-site positioning and paying-off on each section of the inner steel template; s4, before the inner template
supporting system is installed, the worker installs the inner template
supporting system according to the sequence of
animation demonstration of the BIM model; s4, before the inner template supporting
system is installed, a BIM engineer makes and installs
animation demonstration through the inner
steel cylinder template BIM model, visual disclosure is conducted on field management personnel and workers, and the workers install the inner template supporting
system according to the sequence of
animation demonstration; effective combination of the bottom plate and the steel formwork can be effectively guaranteed, displacement of the steel formwork in the mounting process is prevented, defects existing in construction are reduced, and working efficiency is improved.