To solve the influence of inverted arch disease of
railway tunnel in plateau and cold region with high insitu
stress on the tunnel construction progress and following operation safety, the
types and causes of the diseases in Muzhailing tunnel on LanzhouChongqing railway are analyzed in detail. It is concluded that the
inverted arch diseases can be divided into three types such as surface cracks,
cracking and uplift, and water seepage, and the influencing factors are mainly
human and external environmental factors. The analytical results and treatment
technologies adopted show following. (1) In the construction stage, the
diseases can be foreseen and prevented in advance by strictly controlling the
construction technology, strengthening the equipment support and improving the
understanding of high ground stress in plateau and cold area. (2) In the
disease regulation stage, according to the types and development degrees of
disease, measures such as epoxy mortar filling treatment, invert truss
reinforcement, base steel tube pile reinforcement, pressure relief holes
drilling in the seepage section for grouting reinforcement, ditch optimization
to doublecover, and automatic temperature control
electric tracing device installation at the entrance, etc.〖KG-*3〗, can be adopted to reduce the disease
phenomenon or even avoid it.
WEI Li
,
ZHOU Xitao
. Analysis and Countermeasures for Inverted Arch
Diseases in High Geostress Section of Railway Tunnel
in Plateau and Cold Region: a Case Study on Muzhailing
Tunnel of LanzhouChongqing Railway[J]. Tunnel Construction, 2020
, 40(S2)
: 249
-255
.
DOI: 10.3973/j.issn.2096-4498.2020.S2.032
