To effectively control the settlement of the existing
Wuhan metro line 2 induced by neighboring shield tunneling of metro line 7 in
the third terrace of Yangtze river, the settlement control during the whole
process of the shield tunneling is studied and analyzed. According to the test
results of shield tunneling technology and construction scheme optimization,
the piperoof advance support is cancelled, and the compensatory grouting
behind tunnel wall, segment tensioning and reinforcement, and joint sealing are
conducted to metro line 2. Meanwhile, the shield tunneling parameters are
precisely controlled, highaccuracy monitoring
informationized construction and clay shock method are adopted. The monitoring
and practical results show that a micro settlement less than 1 mm is achieved,
indicating the feasibility of the recommended methods.
WANG Jinfeng
,
XIE Qiyong
,
XU Jinbin
,
LI Jieyuan
,
WANG Pan
. Micro Settlement Control Technology for Shield Tunnel
Closely Crossing Underneath Existing Metro Tunnel[J]. Tunnel Construction, 2022
, 42(S2)
: 372
-380
.
DOI: 10.3973/j.issn.2096-4498.2022.S2.046
