In this study, the characteristics of a horseshoeshaped
segment of the Baicheng tunnel of the Menghua railway are analyzed to realize
the efficient segment assembly of a horseshoeshaped
shield tunnel by simulating the segment assembling process. In addition, a
hybrid configuration with decoupling of position and attitude is proposed, and
a novel mechanical locking device with double hoisting bolts is designed.
Through analysis of mechanical principle, the flexibility of the end mechanism
is improved using the redundant drive finetuning
mechanism. Moreover, a fine adjustment angle ± 14° is realized, and a segment erector with six freedom degrees and
seven activity degrees at the end is developed to overcome the problem that the
normal line at the connection surface of the segment does not pass the rotation
center of the erector. The findings show that the shield tunneling method is
suitable for horseshoeshaped tunnels, and the segment
forming quality and construction efficiency can meet the engineering
requirements, ensuring the smooth penetration of the tunnel.
HU Yanwei
,
JIA Lianhui
,
LI Ming
.
Development and Application of Segment Erector for Horseshoe-Shaped
Shield Tunnel
[J]. Tunnel Construction, 2023
, 43(2)
: 327
-333
.
DOI: 10.3973/j.issn.2096-4498.2023.02.014
