During shield
tunneling, the bolt of the rearmounted disc cutter barrel of the
atmospheric composite cutterhead of a largediameter
shield is prone to damage caused by frequent alternating stress. To address
this problem, a frontmounted barrel is designed by
referring to relevant global research results. The force mode of the boltbearing disc cutter thrust is directly changed to that of a tool barrelbearing disc cutter thrust, which greatly strengthens the bolt
protection. By combining theory and finite element analysis, including static
analysis, modal analysis, and harmonic response analysis, a structural analysis
of the frontmounted atmospheric disc cutter barrel is
conducted to verify the reliability of the frontmounted
atmospheric disc cutter barrel. The static analysis results show that the
maximum von Mises stress does not exceed the material′s
allowable stress. The dynamic analysis results reveal how the operating
frequency of the tool barrel is far less than the natural vibration frequency
of the structure, effectively avoiding the occurrence of a resonance failure.
The results validate the rationality of the tool barrel design. Accordingly,
the design scheme is applied to an actual engineering project. The results
demonstrate that the bolt loosening and fracture phenomenon does not occur in
the tool barrel. No seat is broken, and the tool barrel failure phenomenon does
not happen. In conclusion, the structural design of the tool barrel is
reasonable and suitable for the project, providing a reference for the
selection design of the tool barrel for similar projects in the future.
ZHANG Shuaikun
. Design and Analysis of Disc Cutter Barrel Structure of
Atmospheric Composite Cutterhead of LargeDiameter
Shield[J]. Tunnel Construction, 2023
, 43(4)
: 711
-720
.
DOI: 10.3973/j.issn.2096-4498.2023.04.017
