The maximum interoperability bridge in Jinan starting area is fully completed

Reporter Yu Bo Sheng Correspondent Zhang Zhen

On July 21, the largest interchange of the Jinan starting area of ​​the Jinan starting area undertaken by China Railway Tenth Bureau-Longhu Liqiao Bridge Project and National Highway 309 Reform and expansion project paving the last layer of asphalt surface layer, synchronizing the traffic conditions. At this point, the maximum interchange between the starting area is fully completed.

Longhu Interchange Project, that is, the first phase of the "Three Bridge and One Tunnel" backbone road network project (formerly Provincial Highway 101) Interchange Bridge Project. The main bridge has a total of 8 cross -span, 680 meters in length, divided into two, standard width of 35 meters, and two -way 8 lanes.

The stand faces the south crossing the Hanji Railway and National Highway 309. It realizes the conversion of east -west and north direction through the A and B ramps. Recently, the leaf -type construction plan is adopted. The crossing of the yellow tunnel to the south of the road forms a cross. To the east, the A ramp is used as the first phase of the Yellow Tunnel to the north, and the Bype B ramp is connected to the Zidong Avenue and the Jianbang Bridge from the west.

"Except for the construction of the prefabricated box beam frame on the position of the Shanji Railway and the National Highway 309, the rest of the interchange bridge is a continuous pouring beam of the full -frame stent, with a maximum span of 40 meters and a maximum net height of 35 meters." Wang Fengyao, the technical person in charge of the project department, Introduction, the upper part of the Hanyu Railway Bridge is designed in the form of a turnaround, but the on -site construction environment is complicated and the construction period requirements are tight. The upper cross -prepaid beam stand, shortening the construction period of more than half a year.

It is reported that the pile foundation of the interchange bridge is 2 meters and a depth of 75 meters. It is a large diameter ultra -long pile foundation. It is located in Longhu Wetland and adjacent to the railway. The construction quality and safety control are difficult. The project department adopts the follow -up method of follow -up tube to strictly control the proportion of mud, and control the reinforcement cage highly in the overwriting safety limit.

Due to the formation of a narrow to a wide range of the cross -section structure, the border beam stand is limited, and the project department has organized discussions many times to optimize and change the beam. Conventional new support saves a lot of costs and construction periods, and is more secure and reliable at the same time, ensuring that the beam process is safe and smooth.

Longhu Interchange Bridge has played an important role in breaking the plane of the existing roads in the starting area, forming a three -dimensional transportation of up and down. At present, the landscape improvement, the transition of the yellow -driving canal, and the construction of the Unicom project have been completed. , Blue and Gray "that complement each other. At the same time, it is also of great significance to accelerate the "north" pace of Jinan's "north", break the construction of the north -south transportation network, and help the high -quality development of the starting area.

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