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