In order to form a more comprehensive overview of the
current development and technology trends of immersed tube tunnels in China, 36
immersed tube tunnel projects (including 20 built, 10 under construction, and 6
to be built as of the end of 2022) in China are analyzed in terms of tunnel
distribution areas, tunnel structure types, and crosssectional
forms, element prefabrication and application fields. Based on different
application fields, typical immersed tube tunnel projects are introduced and
the prospects of immersed tube tunnel technology are presented. Investigations
indicate that: (1) The immersed tube tunnels in China are mainly constructed in
South China (including Hong Kong and Macao), accounting for 75% of the total
projects across the country. There are 21 immersed tube tunnels in Guangdong
province, with most of them in Guangzhou (a total of 14). (2) Currently, the
reinforced concrete structure is the main structure type of immersed tube
tunnels in China (32 in total), most of which have rectangular sections. (3)
For immersed tube tunnels in China, the element width is between 11.5 m and
55.46 m, and the element height ranges from 6.4 m to 11.4 m. With flexible crosssectional
forms, the immersed tube tunnels are used as pedestrian tunnels, municipal
(highway) tunnels, railway tunnels or combined highwayrailway
tunnels. At present, most are used as the rivercrossing
(undersea) municipal (highway) tunnels. (4) The longest immersed tube tunnel in
China is 5.664 km and the maximum 〖JP2〗number of elements can reach 33, but the length of most immersed
tube tunnels is less than 1 km and the number of elements is 3 to 10. (5)
Elements are generally prefabricated in independent and axial dry docks. Among
the tunnel projects under study, independent dry docks are adopted for 14
tunnels and axial dry docks for 9 tunnels.
GUO Jianmin
,
SHAN Lianjun
,
MA Mingjun
. Statistical Analysis and Development of Immersed Tube
Tunnels in China[J]. Tunnel Construction, 2023
, 43(1)
: 173
-184
.
DOI: 10.3973/j.issn.2096-4498.2023.01.018
