A case study is conducted on the K295 debris flow
disaster regulation project of the ChengduKunming railway to minimize
the risk arising from mountainous railway debris flow and ensure longterm operational safety of the railway. In addition, the situation,
scale, zoning, causes, damage extent, and development trend of debris flow
disaster are analyzed. Further, a comprehensive debris flow disaster treatment
method involving base grouting reinforcement + diversion aqueduct opencut tunnel + tunnel bottom discharge culvert + diversion channel +
chute is proposed based on the idea of "focusing on drainage and giving
consideration to protection". A technical scheme of prefabrication and
assembly of the opencut tunnel arch ring on the
existing operating railway is innovatively proposed to ensure normal railway
operation during the castinplace
construction of the opencut tunnel. Factors such as
the onsite terrain, structural safety, and
construction period are comprehensively considered. The proposed scheme
minimizes the interference between the construction operation and railway
transportation and greatly shortens the construction period.
LIU Ke
,
LI Yunpeng
,
LI Yajun
,
LUO Shi
,
TAN Gang
,
CHEN Xitong
,
QIU Minjie
,
YAO Zhongshan
. Characteristics Analysis of Debris Flow Disaster in
K295 of ChengduKunming Railway and Its Control Countermeasures[J]. Tunnel Construction, 2023
, 43(7)
: 1246
-1256
.
DOI: 10.3973/j.issn.2096-4498.2023.07.018
