Largescale transfer nodes renovation of
the existing metro hub stations involves many issues such as space stress
conversion, demolition and construction scheme, and existing station
protection. Relying on the comprehensive transportation hub transformation
project of the Huangmugang station of Shenzhen metro, the construction
difficulties and corresponding countermeasures faced in largescale transfer nodes renovation of the existing metro stations are
summarized using engineering analogy, simulation calculation, and construction
verification, obtaining a complete set of key construction techniques. The
research results reveal the following: (1) To ensure the normal operation and
structural safety of the existing stations, a renovation principle, supporting
first, then dismantling, sectional construction, and columns before beams, is
established to gradually achieve force conversion. (2) A temporary support
system with antioverturning measures is arranged, and
an automatic servo system is used to automatically compensate for the gap
between the temporary steel column and the structural plate, successfully
achieving the structural stress system conversion from temporary column to
permanent column, and ensuring controllable deformation. (3) A novel
multifunctional enclosure composed of steel skeleton, soundabsorbing cotton, and fireresistant and
soundabsorbing boards effectively minimize the impact
of renovation construction on station operation. (4) Manual handheld air picks are recommended to use to break down the enclosure
structure, and manual breaking, diamond rope saw cutting, and highpressure water jet crushing methods can be used for main structure
according to specific requirements. (5) During construction, key measures such
as antifloating, waterproofing, and monitoring should
be employed to strictly control structural deformation, uneven settlement, and
differential settlement.
SUN Xianghui, DONG Zilong, ZHAO Xiaolong, PEI Shengping
. Key Construction Techniques for LargeScale
Transfer Nodes Renovation of Existing Metro Hub
Stations[J]. Tunnel Construction, 2023
, 43(S2)
: 523
-534
.
DOI: 10.3973/j.issn.2096-4498.2023.S2.057
