A case study is conducted on the Pazhou west tunnel
project in Guangzhou, China, and the structural type and prefabrication scheme
of immersed tunnels in urban core areas are comprehensively compared to select
an optimal structural type and prefabrication scheme of immersed tunnels in the
urban core area. Then, the advantages and disadvantages of steelshell
composite structure (secondary pouring concrete), steelshell composite structure (primary pouring concrete), reinforced
concrete structure (new dry dock), and reinforced concrete structure (mobile
dry dock) are analyzed and compared. The final scheme is selected as the steelshell composite structure (secondary pouring concrete). The
difficulties of dry dock land shortage in the construction project of immersed
tunnel in the urban core area can be solved by adopting the structural type of
smallsection doublelayer
steelshell concrete immersed tunnel and employing
advance construction technologies, such as longdistance
high freeboard transportation and secondary floating concrete pouring. The
method adopted has the advantages of a short construction period, less river
dredging, reliable engineering quality, and environmental protection, which
will be widely used in the immersed tube tunnel under inland rivers.
GUO Jianmin
,
SHAN Lianjun
. Structure Type and Prefabrication Scheme of Immersed
Tunnels in Urban Core Areas: a Case Study of Pazhou
West Tunnel Project in Guangzhou, China[J]. Tunnel Construction, 2022
, 42(11)
: 1906
-1912
.
DOI: 10.3973/j.issn.2096-4498.2022.11.01
