The location, longitudinal profile, mode (doubletrack
tunnel tube or twin singletrack tunnel tubes), lining
structure, construction organization, and disaster prevention and evacuation of
ChongmingTaicang Yangtze river crossing tunnel of ShanghaiChongqingChengdu highspeed railway are studied: (1) The Qiyakou tunnel location is
recommended on the basis of analysis on the stability of the riverbed and by
means of technical and economic comparisons. (2) A Vshaped
longitudinal profile of the tunnel and the principle of controlling the
overburden of the river crossing tunnel are proposed on the basis of analyzing
the topographical conditions, scouring conditions, geological conditions, and
ship anchorage impact of the riverbed. (3) Largediameter
doubletrack shield tunnel is proposed after technical
and economic comparisons. (4) Composite doublelayer
lining structure consisting of prefabricated segment lining and castinsitu concrete lining is proposed on basis
of analysis on the impact of the scouring of the riverbed at local areas. (5)
Two shield machines are proposed for the construction of the tunnel according
to the principle of "environmental protection, controllable risks and
dynamic adjustment". (6) Emergency exits, undertrack
evacuation passages, and refuge areas are arranged for the tunnel by using the
vertical shafts and the space under the track.
WANG Leming
,
TANG Guorong
,
MENG Qingyu
,
MA Zhifu
,
GONG Jiangfeng
. Overall Design of Chongming-Taicang
Yangtze River Crossing Tunnel of Shanghai-Chongqing-Chengdu High-Speed Railway[J]. Tunnel Construction, 2023
, 43(12)
: 2098
-2113
.
DOI: 10.3973/j.issn.2096-4498.2023.12.012
