Since the underground pedestrian walkway, bus
passageway, and underground corridor on the first floor of the underground
transportation hub structure of the Qinghe railway station of Beijing-Zhangjiakou
high-speed railway has been operational simultaneously
with the Qinghe railway station, the conventional open-cut
construction scheme cannot meet the requirements of the targeted construction
period. As a result, the split construction scheme is proposed and applied. The
split construction method includes constructing the underground first-floor structure and steel tube columns using the opencut method and constructing the underground second floor using the
cut-and-cover method. The main
studies and conclusions are drawn as follows: (1) The split construction
sequence, steel tube column construction, connection point between opencut and cutandcover
methods, steel support installation and demolishing in the underground second
floor, and the influence of constructing the underground second floor on the
stability of the steel tube columns are discussed, and corresponding methods
are proposed. (2) The deformation of essential stress structures, steel tube
columns, and the construction period is analyzed by finite element numerical
simulation and site monitoring results. The analytical results show that the
vertical and the horizontal deformation of the steel tube column is
considerably lower than the steel tube column allowance. (3) The split
construction in this project is not beneficial in terms of the construction
schedule, cost, and effect, but the synchronous operation of each traffic
facility and Qinghe station was guaranteed, indicating a possibility of
constructing the underground transportation hub structures and highway station.
ZHANG Haitao
,
LI Zhaoping
,
FENG Chao
,
ZHENG Zaidi
,
WANG Ziyuan
.
Split Construction Method for Underground Traffic Hub
Structure Attached to
Qinghe Station of Beijing-Zhangjiakou HighSpeed Railway
[J]. Tunnel Construction, 2021
, 41(12)
: 2163
-2170
.
DOI: 10.3973/j.issn.2096-4498.2021.12.018
