Building bridges like building blocks! Unveiling the first prefabricated highway bridge project in Jiangsu Province

Time：2020/06/21 Visits：2853

300 tons crawler crane will Precast Pier Column
Accurately set into the reinforcement of bearing platform
The high-strength mortar laid on the top of bearing platform is extruded
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May 12, as the widest bridge in China
Prefabricated bridge project with the heaviest cap beam segment tonnage
The first prefabricated highway bridge project in Jiangsu Province
And major transportation and livelihood projects in Jiangsu Province
China Construction Group's CSCEC installation contractor
Section from Nanjing Raoyue Expressway to xianyinbei section of G312 National Highway
Reconstruction and expansion project ushers in major resumption node
The first one is 7.89 meters high and weighs 81.18 tons
Precast pier column is assembled in place smoothly at one time
The error is controlled within 2 mm
It marks that the project has entered the stage of bridge span structure assembly

Installed as CSCEC
Important representative project of promoting transformation and upgrading
G312 National Road Reconstruction and expansion project will be above the original road
Set up a nearly 5 km "fast corridor"
The original two-way six lane first-class highway will be constructed
The traffic is divided into two-way 12 lanes
After the completion of the Xianlin area to the urban area of Nanjing
Travel time will be reduced by 20 minutes

Green environmental protection

Standardization of prefabricated factory

Walking into prefabrication base of G312 National Highway Reconstruction Project
The sound of the machine boomed and the welding spattered
The workers are working on the assembly line in an orderly manner
The project team took four months to build
A 150000 square meter building
Intelligent and mechanized prefabrication base
There are 4 component production lines in total
There are 386 piers and 386 capping beams used in the project
And 1839 concrete box girder, 144 bridge deck
After batch prefabrication in the base
Then they are transported to the construction site and assembled like building blocks

Compared with traditional road and bridge, most of them are completed on site
Assembly type "bridging" process adopted in the project
The overall construction period is reduced by 30%, and the green environment is also provided
This construction method does not occupy the construction site
Assembly can also be carried out in the condition of semi-pass of the road
Greatly reduce construction noise and the generation of construction waste
Minimum impact on the lives of the public

Science and technology blessing
The whole process of prefabrication and installation is accurate and efficient

At the pier assembly site
Construction personnel shall reserve sleeve position for pier column
Three dimensional laser scanning inspection was carried out with embedded reinforcement of bearing platform
After confirming that there is no deviation
The crane will accurately align the precast pier column
Slowly set into the reserved bearing platform reinforcement for pre assembly
And corrected by Jack
Technical personnel then use the total station for accurate retest
The assembly accuracy should be strictly controlled within 2 mm

The pier column production adopts
Assembling construction method of grouting sleeve connection
The error can be controlled within 0.001 mm by laser cutting
The self-developed positioning plate of CSCEC installation Co., Ltd
Special screw system for adjusting accuracy
The combination of the two ensures that the positioning of the embedded reinforcement is exactly the same

Approach every component in the prefabrication base
Two dimensional code can be found at the bottom of the component
And it is embedded with RFID electronic technology chip
This chip is similar to the electronic ID card of the component
Just scan the QR code
You can see the whole record of component positioning and production process
Every process management has a trace to follow
After the highway is opened to traffic, electronic chips
It will also be in the maintenance work of later components
Play an important role
The staff only need to hold a radio frequency device
It can be monitored within 10 meters
Usage of any component
In order to judge its use and whether maintenance is needed
This is also infinite RF technology
The first application in highway prefabricated bridge engineering in China

"Smart factory" for component production
It can also be "packed and taken away" after the completion of the project
"Landing" again in other prefabricated bridge projects
Continue to play its role in production
At the same time of introducing modern advanced equipment
The concept of intelligent construction and lean construction is also implanted
It can improve the quality and efficiency of component production
This "assembled" factory can also be disassembled and reorganized
Truly realize the recycling of wisdom

Comprehensively deepen enterprise reform, focus on promoting transformation and upgrading
CSCEC actively practices new development concept
Mode innovation, business innovation and technological innovation
Strengthen the differentiation of professional brand advantages
It realizes the transformation from professional subcontracting to general contracting
From traditional electromechanical and petrochemical business to
Municipal water environmental protection, urban renewal, new infrastructure
Transformation of equipment manufacturing, industrial intelligence and other new formats
From traditional construction mode to green construction and intelligent construction
Construction industrialization and other new construction mode transformation
Achieving the goal of "one creation and five strong" for CSCEC
Contribute professional strength!
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