Double-shield tunnel boring machines(TBMs) always cause ground displacement
and deformation when tunneling in complex rock strata in urban areas. To
guarantee construction safety and minimize the influence on the surrounding
environment, advanced deep geological layer monitoring methods are adopted for
intact and fractured rock masses. Based on FLAC3D numerical simulation
software, a real-time monitoring and simulation
analysis of geological displacement during construction process of the double-shield TBM are conducted. The research results indicate the
following: (1) In slightly-weathered granite
formations, the displacement of the intact rock mass caused by double-shield TBM construction is within the range of －1－1 mm, belonging to elastic deformation.
(2) In the fractured formations, the soil displacement pattern caused by double-shield TBM construction presents the characteristics of "one
zone in horizontal direction, one layer in vertical direction, and two-stage in longitudinal direction". (3) The double-shield TBM has little influence on the intact rock mass in slightly-weathered granite formations, while measures should be taken to
control ground displacement when it is applied in fractured formations.
WANG Zheyong
,
LIU Chenglong
,
XU Zhen
,
XIAO Yongqiang
,
ZONG Chao
,
SUN Yingtao
,
JIANG Yusheng
. Displacement and
Deformation Mode of Complex Rock Strata in Central Urban Area Induced by Double-Shield Tunnel
Boring Machine[J]. Tunnel Construction, 2024
, 44(S2)
: 135
-143
.
DOI: 10.3973/j.issn.2096-4498.2024.S2.014
