A selfadaptive control method for the shield posture based on the thrust
vector technology is proposed, in order to solve the problem of the
fluctuations in the tunnel axis caused by the shield drivers. The control
method is comprehensively elaborated from three aspects: the overall logic
structure design, the rectifying movement path planning, and the shield posture
control strategy and methods. The control method is applied in the construction
of the Wusongkou river-crossing tunnel on Shanghai-Nantong railway, and conclusions drawn are as follows: (1) Due to
the good execution of the target pressure of the propulsion cylinders, a good
collaborating relationship between the target total thrust and the actual total
thrust is observed, and the shield has a stable advancing speed. (2) The target
horizontal moment of the total thrust and the actual horizontal moment of the
total thrust are highly consistent; however, due to the influence of the
overburden thickness and the geological conditions, the target vertical moment
of the total thrust is slightly higher than the actual vertical moment of the
total thrust so as to maintain good shield posture adjustment capability in the
vertical direction. (3) The relationship between the acting point of the total
thrust and the posture of the shield in the horizontal direction and in the
vertical direction roughly takes a "sugar-coated
haws"-shaped feature, the deviation of the shield
posture can be rectified and the shield posture can be controlled.
ZHU Yeting
,
BI Xiangli
,
ZHANG Zixin
,
ZHU Yanfei
,
QIN Yuan
,
WANG Hao
,
PAN Chengjie
. Research on Self-Adaptive Control of Shield Posture Based on
Thrust Vector Technology[J]. Tunnel Construction, 2024
, 44(11)
: 2257
-2270
.
DOI: 10.3973/j.issn.2096-4498.2024.11.016
