After the TBM boring in the exit end of the
Gaoligongshan tunnel of the DaliRuili railway at section D1K224+200~+230, sudden water and mud
outburst occur, which leads to tunnel collapse, TBM jam, and belt conveyor
stop. As a result, the causes for water and mud outburst are analyzed, and a
series of techniques such as surface river channel repair, collapse cave
backfilling, and deephole grouting reinforcement are
conducted to guarantee the tunnel roof stability and prevent water inrush based
on treatment experience of water and mud outburst in waterrich fullyweathered granite. Meanwhile, the
grouting reinforcement retailing walls are conducted on both sides of water and
mud outburst point to provide safety guarantee for mud clearing and TBM reboring. A treatment scheme of highlevel
lock, discharge and depressurization, twoend stop,
support strengthening, and fastexcavation and fast
seal is formed, which has successfully solved the water and mud outburst in
tunnel in waterrich weathered granite.
JIA Jianbo, GAO Guangyi, WEN Xingming
. Comprehensive Treatment Techniques for LargeScale
Water and Mud Outburst in Gaoligongshan Tunnel[J]. Tunnel Construction, 2021
, 41(S1)
: 394
.
DOI: 10.3973/j.issn.2096-4498.2021.S1.051
