In the process of installing steel brace in foundation
pit with the gantry crane and the excavator, there always exists the problems
of nonstandard construction, high construction risk, low operation
efficiency, and long material operation cycle. Arming at these problems, a
novel technology is proposed based the project of Liuyanjing metro station of
Nanchang metro line 3 constructed by semicover
excavation method. Through researching the supporting embedded parts of
suspended crane and the track walking system, the steel brace mounting
technology by combining a gantry crane on the ground and a hang crane installed
below the cover plate is developed and successfully employed. The engineering
practice demonstrates that: (1) The standardization level of construction in
worksite is improved by the standard operation processes where the steel braces
are installed by the cooperation of a hanging carne and a gantry crane; (2) Compared
with the traditional construction method, the daily production capacity of the
steel support is increased from 3 to 5 after the proposed method is employed;
and (3) After adopting the new technology, the manual link is reduced, the
labor intensity is greatly reduced, and the safety risk in the traditional
construction process is eliminated.
QIN Zhengyang, AN Bin
.
Mounting Technology for Steel Brace in Deep Foundation
Pit of Metro Station
Constructed by Semi-Cover Excavation Method: A Case Study
on Liuyanjing Station of Metro Line 3 in
Nanchang, China
[J]. Tunnel Construction, 2023
, 43(S1)
: 407
-415
.
DOI: 10.3973/j.issn.2096-4498.2023.S1.047
