Herein, a case study is conducted on the No. 5
connecting passage project of the Haizhu Bay tunnel. Then a series of
comprehensive construction technologies for a mechanized connecting passage of a super-large
diameter shield-tunnel are innovatively proposed. These
technologies include: (1) A synchronous construction internal support auxiliary
system: uniquely designed upper and lower force transmission support members
connect the main tunnel segments, providing stable reaction force for the
passage tunneling and reserve transportation space for synchronous
construction. (2) Accurate grouting points and slurry: the ground grouting
microreinforcement technology is used to enhance the
soil strength. (3) A glass fiber and reinforced concrete composite lining
segment structure: an inner cladding steel plate is set at key positions to
relieve stress concentration. (4) Optimized shield launching and receiving
processes to ensure construction safety. The engineering practice and
monitoring analysis show that these technologies guarantee efficient
synchronous construction of the main tunnel and the connecting passage, greatly
improving the construction efficiency. The settlement and deformation of the
surrounding environment and the main tunnel segments of the No. 5 connecting
passage are within allowance. The maximum settlement of seriously-affected segment at pipe jacking machine launching end reaches －5.6 mm, and that at receiving end reaches －8.6
mm, indicating good overall deformation control effect.
HUANG Shuhua
. Key Construction Technology and Application Practice
of Mechanized Connecting Passage of a Super-Large Diameter Shield Tunnel in Complex Water-Rich Strata[J]. Tunnel Construction, 2025
, 45(S1)
: 280
-289
.
DOI: 10.3973/j.issn.2096-4498.2025.S1.028
