The bottom heave of an operating highspeed
railway tunnel induces deformation of ballastless track, and further affects
traffic safety. Accordingly, the driving safety control measures of highspeed railway trains are discussed and some suggestions on the
prevention and remediation of tunnel floor heave are put forward based on
analysis of the treatment practice process of floor heave of a highspeed railway tunnel. The main conclusions are drawn as follows. (1)
The fine adjustment of track along a slope can only relieve the poor track
quality caused by floor heaveinduced track deformation
temporarily, but cannot eliminate it. (2) If the tunnel is open for operation
with bottom heave disease, not only the maintenance workload would be greatly
increased, but the operation order would be greatly affected. The optimal
rectification time for floor heave is before operation. (3) The prospective and
essential way to prevent tunnel floor heave lies in accurate investigation and
judgment, targeted design, and strict scientific construction. The practical
results show that the treatment scheme with anchoring technology for tunnel
floor heave is invalid under MPalevel geostress,
whereas an assistant flexiblesupported small crosssection pilot tunnel will be a possible way to prevent tunnel floor
heave under large geostress.
ZHOU Bao′an
,
WU Jian
,
WANG Lichuan
,
GONG Lun
,
MA Xiangfeng
,
XU Zhaoqiang
,
ZHAO Wei
,
ZHANG Peng
. Practice and Discussion on Treatment of Ballastless
Track Deformation of a HighSpeed
Railway Tunnel Caused by Floor Heave Based on Traffic Safety[J]. Tunnel Construction, 2021
, 41(3)
: 474
-482
.
DOI: 10.3973/j.issn.2096-4498.2021.03.017
