To realize high-precision and high-efficiency prefabrication of steel-shell-concrete immersed tubes for the Shenzhen-Zhongshan
link (hereinafter the Shenzhong link), the cell-type
concreting sequence without support is studied. First, the simulation
calculation methods for steel-shell-concrete immersed tubes under the combined action of time-varying strength, shrinkage, creep, hydration heat, and deadweight
of concrete are investigated. Second, the influence of the temperature field of
concrete hydration heat on tube deformation is analyzed. Finally, the influence
of cell-type concreting sequence with and without a
support system on the deformation of immersed tubes is analyzed and the optimum
concreting sequence is chosen. The results show the following: (1) the
hydration heat of concrete has a limited influence on the final deformation of
tubes; (2) the ceu-type and hopping concreting
technology is the optimum considering the pouring efficiency of the intelligent
trolley and deformation control; and (3) the support system can be canceled as
it has a negligible influence on the deformation of the top plate.
SUN Wenhuo
,
LIU Meimei
,
JI Ting
. Concreting Sequence without Support for Steel-Shell-Concrete Immersed Tube of Shenzhen-Zhongshan Link Based on Segmental Deformation Control[J]. Tunnel Construction, 2021
, 41(12)
: 2106
-2112
.
DOI: 10.3973/j.issn.2096-4498.2021.12.011
