A prefabricated platform slab made of ultrahigh
performance concrete(UHPC)is proposed to address the problems of complex
processes and long construction platform slab periods in a metro station at the
phase Ⅱ project of the Guangzhou metro line 14. Then,
the block design, joint connection, and construction scheme of the platform
slab is studied, followed by an analysis of the stress and deformation,
employing numerical simulation calculations to analyze and inspect the outdoor
assembly test effect. Finally, the prefabricated UHPC platform slab is compared
with the conventional platform slab in terms of technical and economic aspects.
The results reveal the following: (1) Although the stress of the UHPC
prefabricated platform slab structure is reasonable, the stress and deformation
indices are far less than the specification′s limit.
(2) Since single prefabricated components are characterized by small size and
light weight, they could easily be operated and accurately assembled quickly.
(3) While the assembly rate of the platform slab of a single standard station
reaches 78%, the structural weight is reduced by approximately 50% compared
with the precast concrete platform slab. Thus, the technical scheme is
reliable.
YU Bo
,
WANG Hujia
,
GAO Kun
,
ZOU Yu
. Research on Structural Technology of Prefabricated
UltraHigh Performance Concrete Platform Slabs[J]. Tunnel Construction, 2022
, 42(11)
: 1898
-1905
.
DOI: 10.3973/j.issn.2096-4498.2022.11.009
