When a doubleshield tunnel boring machine
(TBM) is applied in urban rail transit, there are always several limitations,
such as no condition for launching shaft construction, low construction
efficiency due to doubletrack smallspacing excavation and frequent station passing, and low economic
benefit. Accordingly, a case study is conducted on Qingdao metro line 1.
Further, the applicable experience of doubleshield TBM
used in Qingdao metro line 2 is studied, and detailed conditions of line 1 and
the TBM characteristics are analyzed; thus, a suite of negative ring launching
techniques of doubleshield TBM based on tunneling
mode, parameters, and attitude control is developed. The techniques include
doubletrack smallspacing
tunnel excavation realized by a movable support trolley installed in the
advance tunnel and Soletanche grouting reinforcement and backup trolley stationpassing technology
realized by precast steel support replacement. The application of the
techniques shows a good effect in Qingdao metro line 1.
GUO Zhi
,
QU Qiufen
,
FAN Zhiguo
,
LIU Guitao
,
LU Xiaofeng
,
GONG Yinglei
. Construction Technology Innovation of Double-Shield
Tunnel Boring -Machine in Qingdao Metro Line 1[J]. Tunnel Construction, 2021
, 41(8)
: 1385
.
DOI: 10.3973/j.issn.2096-4498.2021.08.015
