The construction of tunnels
on the Chengdu-Kunming 2nd railway encounters
numerous geological challenges, including significant soft rock deformation,
collapse, and water and mud gushing. To ensure construction safety and maintain
project progress, a comprehensive tunnel water gushing treatment methodology,
comprising exploration, interception, bypass, and drainage, is proposed for
karst tunnels. In settings characterized by water-rich
surrounding rocks and severe water and mud gushing, parallel heading tunnels
are deployed to facilitate advance water discharge, water separation, and
energy release and decompression. Additionally, a grouting technology termed
"sealing and drainage" is utilized, applying grout from water-poor to water-rich sections. For tunnels
surrounded by soft rocks with pronounced deformation, both long and short bolts
are employed to reinforce the surrounding rock, thereby optimizing tunnel
structure and enhancing its anti-deformation capacity.
The implementation of these technologies has demonstrated effectiveness and
offered distinct advantages in applicable tunnels.
XIAN Guo
,
ZOU Yongmu
,
LI Xiaobing
,
WANG Guan
,
WANG Yangyang
. Integrated Application and
Some Issues of Modern Tunneling Technology
for Chengdu-Kunming Railway Tunnel[J]. Tunnel Construction, 2024
, 44(8)
: 1713
-1722
.
DOI: 10.3973/j.issn.2096-4498.2024.08.018
