To clarify the characteristics of single and doubletube extralong
mountain railway tunnels, a statistical analysis is conducted on 310 extralong mountain railway tunnels. The lengths of doubletube extralong mountain railway tunnels
built and under construction in China and those in Asian and European countries
are summarized. Statistical results show the following. (1) For the extralong mountain railway tunnels in China with a length of 10~15 km,
the ratio of the single to doubletube tunnels built is 18∶1, and the singletube mode is the most popular in the tunnels under construction. (2)
For the extralong mountain railway tunnels in China
with a length of 15~20 km, the ratio of the single to
doubletube tunnels built is approximately 1∶1 and that for the tunnels under construction is 20∶1. (3) For the
extralong mountain railway tunnels in China with
lengths above 20 km, the doubletube singletrack is commonly used in tunnels built, and the ratio of the single to doubletube tunnels under construction
is 5∶2. (4) By the end of 2020, considering the total
number of the extralong mountain railway tunnels built
and under construction, singletube tunnels have
increased by approximately 30%, whereas doubletube
tunnels have increased by approximately 1%. (5) The mountain railway tunnels in
Asian countries (except China) with lengths above 20 km are singletube doubletrack tunnels, whereas those in
European countries are doubletube singletrack tunnels.
LI Qi
,
WANG Xue
,
YANG Chang
,
LI Min
,
ZHU Qiao
,
XIE Xueyi
. Statistics on Length Characteristics of Single and Double Tube Extra long Mountain Railway Tunnels in China and Abroad[J]. Tunnel Construction, 2021
, 41(7)
: 1252
-1258
.
DOI: 10.3973/j.issn.2096-4498.2021.07.019
