As the dimension of the slurry shield is greatly increasing, more and more attention is paid to the
face stability of slurry shield-driven tunnel in recently years. A reduced-scale slurry shield model test is carried
out based on the background of Qianjiang River Tunnel and Shanghai Yangtze River Tunnel. The results of the
model test are presented in this paper with particular emphasis on the slurry shield driving parameters and the
critical slurry pressure of the excavating face. It is shown that the behavior of large slurry shield-driving induced
by the cutting face is mostly decided by the fluctuation of the slurry pressure in the chamber, and a smaller
slurry pressure fluctuation range is presented according to the results of the physical model test. Especially, it is
more difficult to control the machine in sandy silt than that in soft clay and muddy clay. The chamber pressure
will fluctuate greatly when excavating in high permeability ground, and the gradient of accumulation of the flux
difference could be used to evaluate the face balance of the slurry shield excavation.
HU Xin-yu1* (胡欣雨), ZHANG Zi-xin2 (张子新)
. Physical Model Test on the Behavior of Large Slurry Shield-Driving Tunnel in Soft Clay[J]. Journal of Shanghai Jiaotong University(Science), 2013
, 18(6)
: 693
-698
.
DOI: 10.1007/s12204-013-1451-9
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