The cast-in-place platform plate presents various
disadvantages, such as poor construction quality, tight deadlines, and numerous
construction processes. To address these challenges, a prefabricated assembly
platform plate made of active powder concrete is proposed. The design of the
disassembly process, node connections, and construction methods for this
platform plate are thoroughly analyzed. Furthermore, numerical simulations are
conducted to evaluate the structural forces during both the lifting and operational
stages. Furthermore, the rationality of the structural system and connection
nodes is verified, and a comparative analysis is conducted against a
conventional platform plate in terms of technical and economic factors. The
results reveal the following: (1) The platform plate is made of reactive powder
concrete with high compressive and flexural strength that can reduce the cross-sectional size of components and the selfweight of the structure.
Furthermore, cavity structures are incorporated in walls beneath the platform,
achieving lightweight components. (2) Various modular combination schemes for
platform plates are explored, tailored to accommodate cylindrical and square
columns in stations constructed using different methods. A modular combination
is adopted for different platform widths, with a lower number of component
specifications and better universality. (3) Node connections are proven to be
reliable, with reasonable structural stress distribution. Both stress and
deformation indices remain within the specified limits, meeting the
requirements for bearing capacity and normal application. (4) Safe and
effective construction methods are proposed based on component partitioning and
combination schemes. (5) The prefabricated platform plates significantly
improve construction speed and quality, while laying the groundwork for
sustainable, all-round safe construction of rail
transit.
LIU Chenglin
,
YANG Ming
. Disassembly Design and
Construction Method of Prefabricated
Platform Plate Structures[J]. Tunnel Construction, 2025
, 45(3)
: 596
-603
.
DOI: 10.3973/j.issn.2096-4498.2025.03.015
