Tianyuan Construction Group to Complete China's Longest Bridge Jacking Reconstruction Project
PR95154
LINYI, China, March 24, 2022 /PRNewswire=KYODO JBN/ --
- Beijing Road Yihe Bridge and Cross-strait Interchange Engineering Project Is
about to Complete within This Year
Tianyuan Construction Group, one of China's top 500 construction companies,
will complete the renovation of Yihe Bridge, located on Beijing Road in Linyi
city, Shandong province, in early April, concluding China's largest and longest
bridge jacking reconstruction project by area and length respectively.
video-https://mma.prnewswire.com/media/1773199/video.mp4
Located on Beijing Road in the south of the city, Yihe Bridge was
1,210.72m-by-23m with a jacking height of 1,050m. After renovation, it will be
1,792m-by-52m.
"The successful completion of the Beijing Road Yihe Bridge jacking project will
greatly ease the traffic situation between Beicheng New District and Hedong
District," said Li Baoqiang, whom is in charge of the reconstruction project
from Tianyuan Construction Group.
Reconstruction involves the simultaneous lifting of two new 15m-wide bridges on
the north and south sides of Yihe Bridge. The entire upper structure of the old
bridge will be lifted by 2.57m. The lifting of the northern and southern
sections was completed in November 2021 and February 2022 respectively.
Currently, the cover beam of the southern section is being heightened and is on
track for completion in early April. The entire project is planned to complete
before October 1, 2022, which will ensure that traffic on both sides of the Yi
River is smooth, spurring the regional economy.
Main challenges faced
In order to ensure safety during the bridge jacking process and ensure that
equipment is stable, 19 sets of limiters were installed on the bridge deck,
preventing vertical and horizontal displacement of the beam body during the
jacking process.
Beijing Road Yihe Bridge was lifted via an alternate lifting process. This
process involves two sets of jacks being lifted synchronously underpinned by
support. This method allows for continuous lifting of the entire jacking
process, ensuring efficiency and control. Furthermore, a PLC hydraulic
synchronous control system was incorporated to ensure synchronization and
structural safety.
Reasons for bridge jacking
As Beijing Road Yihe Bridge is a transportation hub connecting New Beicheng and
Hedong districts, it is important that it functions well and safely. Bridge
jacking is essential for the repair and maintenance of bridges.
In November 2019, dynamic and static load tests were carried out on Beijing
Road Yihe Bridge. The tests showed that the bridge met bearing capacity
requirements and had sufficient safety reserves. Therefore, there was no need
to demolish the old bridge.
To meet flood control requirements, in which the minimum elevation of the
bottom beam has to be 0.8m higher than the 100-year flood level of 72.36m, the
superstructure of the old bridge also had to be raised by 2.57m.
Furthermore, the current bridge is supported by a 30m-wide simple support box
girder. However, as there are many piers and columns under the bridge, a
60m-wide girder was recommended instead for a better bridge view.
Source: Tianyuan Construction Group
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