A smalldiameter conventional pipejacking machine cannot be dismantled and maintained in tunnels, and
the cutters on the cutterhead cannot be replaced after failure. Therefore, a
reversible cutterhead that can be used in a smalldiameter
pipejacking machine is designed. A numerical
calculation method is used to determine the correlation factors of the turning
arm′s angle. Furthermore, three structural designs for
the key components of the reversible cutterhead are proposed. The structural
strength is examined, and the muck fluidity is analyzed through numerical
simulation. Finally, the feasibility of the reversible cutterhead is validated
through indoor tests and site application. The results
are summarized as follows: (1) Factors, such as the position of the rotation
center, gravity center, allowable limit position, size and bearing capacity of
cutters, and structural strength, should be considered for the turning arm. (2)
Three key-targeted designs of the turning arm, i.e.,
separation design of connection and torsion, twoway
limit design, and eccentricity design of the edge disc cutter, can meet the
requirements of engineering geology and equipment reliability.
XUE Jing
. Design and Application of Key Components of Reversible
Cutterhead for PipeJacking Machines[J]. Tunnel Construction, 2023
, 43(12)
: 2139
-2145
.
DOI: 10.3973/j.issn.2096-4498.2023.12.016
