For fullface
vertical shaft boring machine with superlarge
diameter, a type of graded excavation cutterhead driven by conventional power
system is developed to match the localization and generalization of the driving
system of boring machines, reduce the manufacturing difficulty, and shorten the
processing time. Based on a vertical shaft project in China and the graded
excavation design method, a graded excavation cutterhead with a diameter of
21.85 m embedded in the sliding cutter box and driven by a 5.3 m main bearing
is developed. To minimize the torque and power required by the cutterhead, the
cutterhead regulates the change in position and height of the disc cutter by
stretching the sliding cutter box up and down, so that only a part of the disc
cutters engage in each rockbreaking operation. In
practical engineering applications, the cutterhead torque is less than 17 000
kN·m, the maximum daily advancing length is 1.8 m, and
the average daily advancing length is approximately 1 m, indicating a favorable
application effect. Finally, several recommendations for improving graded
excavation cutterheads are provided.
LIU Zaizheng
,
KE Wei
,
YAO Man
,
JI Zhiyong
,
WEN Zhongbao
,
YANG Xu
. Structural Design and Application of Cutterhead for
Graded Excavation of FullFace
Vertical Shaft Boring Machine with SuperLarge Diameter[J]. Tunnel Construction, 2023
, 43(6)
: 1057
-1064
.
DOI: 10.3973/j.issn.2096-4498.2023.06.016
