The accidental drilling of underwater shield tunnel
will produce a large amount of gushing water and mud, which will significantly
affect the construction and operation of the tunnel, and the repair measures
will affect the longterm operation safety of the tunnel.
When accidental drilling damage occurs to the underwater tunnel, effective
temporary blocking and sealing should be carried, and the one hundredyear operation of tunnel after repairing should be guaranteed. As a
result, the repairing idea is put forward. Firstly, the floating ship is used
to carry out cement sealing, and the isolation island is built to cut off the
connection between the tunnel and the sea water. And then the deformation
monitoring on segment and recheck of tunnel central line are carried out after
temporary sealing, and the influence of the drilling hole on the tunnel
boundary is clarified. The structural safety is evaluated by calculation, and
the evaluation results show that the drilling hole has little influence on the
segment structure. Finally, the scheme of ground grouting, inhole grouting, inverted cone sealing and inhole
bracing steel plate is adopted to repair the tunnel drilling position and ensure
the safe operation of the tunnel. In addition, the tunnel protection should be
paid attention to when carrying out relevant treatments.
HAN Yun
. Study on Treatment Technology of Water Gushing and Mud
Bursting Caused by Segment Drilling of Underwater Shield Tunnel[J]. Tunnel Construction, 2020
, 40(7)
: 1049
-1056
.
DOI: 10.3973/j.issn.2096-4498.2020.07.015
