Guangzhou's first pedestrian bridge across the Pearl River is both an "art bridge" and a "science and technology bridge"

Yangcheng Evening News all-media reporter Zhao Yanhua Sun Qiman Tang Heng

Guangzhou's first pedestrian bridge across the Pearl River, located on the new central axis of the city, was officially opened on the 25th.

The pedestrian bridge was jointly designed by academician He Jingtang, the Architectural Design and Research Institute of South China University of Technology and the Guangzhou Municipal Engineering Design and Research Institute, invested and constructed by Guangzhou City Investment Group, and constructed by China Railway Guangzhou Engineering Bureau Group. The design of the bridge is based on the concept of "Qinming Silk Dance and Lingnan Flower Boat", which is very Lingnan characteristics. At the same time, the bridge integrates "science and technology" everywhere, adopts the ultra-high-performance concrete new material compression technology used for the first time in the history of bridge construction in China, and sets up the benchmark of the times for scientific and technological bridge construction.

Open up the pedestrian barrier of Guangzhou's new central axis

"More and more cross-river bridges have been erected on both sides of the Pearl River, but it is the first time that a cross-river pedestrian bridge has been built on the Pearl River." Chen Qiang, deputy secretary of the party committee, vice chairman and general manager of Guangzhou City Investment Group, said that in recent years, many citizens and tourists have proposed to build a pedestrian bridge connecting Haixinsha, Ersha Island and Canton Tower, open up the pedestrian barrier of the new central axis, enhance the seamless tour experience between the two sides of the strait, improve regional supporting facilities, and increase the vitality of urban space.

Chen Qiang introduced that the planning and construction of pedestrian bridges fully consider the interconnection of the slow travel system on both sides of the Pearl River on the new central axis, and has four outstanding functions-

The first is to improve security guarantees. While facilitating the crossing of the river, it is conducive to the two-way rapid evacuation of the flow of people on Haixinsha Island and Guangzhou Tower Scenic Area.

The second is to improve environmental quality. On the basis of creating a seamless viewing corridor between the two sides of the strait, it provides a unique new experience of passage and viewing for citizens and tourists.

The third is to improve the vitality of the city. On the basis of improving the environmental quality of the entire region of Huacheng Square, Haixinsha, Ersha Island and Canton Tower, the CBD business district of Zhujiang New Town will be extended to Jiangnan and the Guangzhou Tower Cultural Tourism Integration and Innovation Demonstration Zone will be expanded to the north of the river, becoming a new link for economic, commercial, tourism and cultural development on both sides of the Pearl River.

The fourth is to improve the vitality of the Bay Area. The new central axis is not only the living room of Guangzhou City, but also the living room of the Bay Area City, which can hold cultural tourism and sports activities in the Bay Area city and even international on the Haixinsha, Canton Tower and Pedestrian Bridge, and interact with the waterfront environment, lighting and music atmosphere on both sides of the river to form a vivid urban activity display picture.

Completed a number of technical research such as wind and earthquake resistance

Guangzhou's first pedestrian bridge across the Pearl River is not only a "people's heart bridge" and "art bridge", but also a "science and technology bridge" and an "innovation bridge". As one of the joint design units of the bridge, the team of Guangzhou Municipal Engineering Design and Research Institute has overcome the key technical difficulties such as novel structural system, complex local structure, high manufacturing accuracy requirements, and difficult construction control through innovative design, and completed many key tasks such as static analysis, human vibration, wind resistance design, seismic design, durability design, docking platform, drainage and flood control at various stages of the structure of the super-span curved beam inclined arch pedestrian bridge in a short period of time.

The completion of this bridge is also inseparable from the construction workers who have worked tirelessly and sweated in the past year. The reporter learned that the construction of the pedestrian bridge invested nearly 500 construction workers and technicians, overcoming a number of construction difficulties.

Tang Yun, secretary of the party committee and chairman of the board of directors of China Railway Guangzhou Engineering Bureau Group, introduced that this is the world's largest span of oblique arch curved beam pedestrian bridge, with the main girder structure is curved, the arch rib lateral slope, the bridge span is large three characteristics, the beam arch production and installation precision is high, the linear control requirements are strict, the transport and hoisting risk is large, and the construction waters and surrounding areas are complex. Therefore, the bridge is also a scientific and technological bridge.

For example, Tang Yun said that because the shape and size of about 13,000 components of the bridge arch ribs are different, the construction personnel select the raw materials of the arch rib steel beam with the best quality performance in China, use 3D imaging technology and BIM technology to ensure the perfect matching between sections, and use the 3D imaging system to ensure the accurate alignment of the spatial position, accurately achieve millimeter-level engineering quality control, achieve the unity of quality and beauty, and strive to create a beautiful art bridge on the Pearl River.

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Ten innovations in the design of pedestrian bridges across the Pearl River

1. Super large span curved beam oblique arch multiple combination structure system

As the world's largest span and the widest bridge deck, the main arch of the bridge slopes 10° to the east, the arch span is 198 meters, the arch height is 56 meters, the main girder is a curved beam, the middle span bridge deck is 15 meters wide, the east side trail is about 273 meters long, and the west side trail is 251 meters long. The bridge is equipped with 23 booms, the main girder adopts the overall box section with good torsional performance, the arch and the beam are consolidated at the junction of the arch and beam, and the load is transmitted to the foundation through the boom and arch, which has the advantages of large structural stiffness, strong anti-overturning ability, good wind resistance and seismic performance.

2. New large diameter steel concrete anti-thrust pile

The diameter of the pile foundation is 3 meters, and the section steel is added to the top of the reinforced concrete pile pile to withstand the huge shear force, improve the thrust resistance of the pile foundation, and ensure the safety of the structure.

3. Ultra-high performance concrete wrapped steel box concrete combination structure

A 10-meter ultra-high-performance concrete layer is set up under the arch ribs, which enhances the local stiffness and anti-collision performance of the arch ribs, and isolates the arch rib steel plate from the water, solving the problem of anti-corrosion of steel structures underwater and in the splash area.

4. New pedestrian bridge deck paving structure

The 2.5 cm ultra-high performance concrete layer is set up on the bicycle path and slope, which uses the super tough and super strong characteristics of the ultra-high performance concrete to enhance the deformation and crack resistance of the thin layer paving and the main structure, and improve the durability of the steel beam.

5. Vibration suppression technology of large-span curved pedestrian bridge

An eddy-current TMD damper with a total weight of 25.6 tons is installed to meet the comfort requirements of pedestrian traffic during peak holiday periods.

6. Partial combination steel box concrete arch rib structure

Concrete was poured into the pressurized area of the arch ribs to form a partial steel pipe concrete arch bridge system, which improved the structural stiffness and pedestrian comfort.

7. The arch foot and arch beam combine the node fine design

The structure of the two nodes of arch foot and arch seat, pile consolidation and arch beam consolidation is extremely complex, in order to ensure structural safety, the local model is used to refine the calculation and design of the two nodes.

8. Riding straddle hydrophilic embankment platform structure

The construction of the cross-span hydrophilic embankment platform realizes the leveling of the east-west lead bridge and the embankment, and at the same time meets the needs of barrier-free design, greatly reducing the damage of the levee, avoiding the setting of cofferdams, and reducing the cost of the project.

9. Anchor pull plate structure of the new type of bridge deck tension sling

A new type of anchor tensioning structure has been developed, which reduces the size of the anchor drawing plate structure and facilitates construction and later operation and maintenance.

10. Bridge invisible seamless telescopic device

The invisible seamless telescopic device of the bridge is adopted to meet the requirements of natural and three-dimensional dynamic deformation of the bridge structure.

"Guangzhou Tsai" is the main creator of the design of the pedestrian bridge across the Pearl River

"I hope this bridge is loved by everyone"

Yangcheng Evening News all-media reporter Wang Man

"Guangzhou's first pedestrian bridge across the Pearl River is the world's largest span and widest curved girder diagonal arch pedestrian bridge, and the first landmark building completed by local designers in the core section of Guangzhou's central axis." On the 25th, guangzhou's first pedestrian bridge connecting the two banks of the Pearl River was opened, and Qiu Jianfa, the main designer of the bridge and deputy chief architect of the Architectural Design and Research Institute of South China University of Technology, sighed.

From the start of construction in May last year to the completion of the traffic now, the construction of the pedestrian bridge across the Pearl River took just over a year. "The bridge is dominated by people," so we started more from people's behavior habits in design, and tried to provide a safe and comfortable walking environment for the public as much as possible." Qiu Jianfa said that urban buildings should be people-centered, the design of the pedestrian bridge across the Pearl River is more humanized, barrier-free ramps, ground anti-slip treatment, round anti-collision design, leisure steps, etc. are all for the convenience of citizens to travel, shade canopy, cool spray and three-dimensional greening can also effectively cope with guangzhou's hot and rainy weather.

In Qiu Jianfa's view, Guangzhou's first pedestrian bridge across the Pearl River is also a link connecting the city's north-south axis, connecting the surrounding important facilities and attractions such as Canton Tower, Haixinsha, museums, and art parks. In the future, it can not only carry traditional festivals and celebrations, watch dragon boats, enjoy National Day fireworks, spring festival flower market on the bridge, etc.; it can also plan creative new fashions and join the Guangzhou Light Festival performance.

"There is no precedent for the construction of the pedestrian bridge across the Pearl River in Guangzhou, and the team faced many technical problems in the design and construction of the bridge." Qiu Jianfa said frankly that it is precisely because of this that many pioneering technologies and processes were born on the pedestrian bridge across the Pearl River, such as the integration of photovoltaic, shading, spraying, and lighting design of awnings, and information wisdom bridge systems.

Qiu Jianfa also mentioned that the shape of this pedestrian bridge across the Pearl River is a full three-dimensional surface, which requires higher structural calculation and precision control. In the design, there are nearly 1,000 modeling models and structural calculation models alone. In addition, in order to adapt to changes in the conditions on the construction site, a lot of work is even overturned.

"I am a native of Guangzhou, and I have witnessed the construction of one cross-river bridge after another in Guangzhou." Qiu Jianfa said that watching the pedestrian bridge he designed from a design drawing to a physical body is like watching his own children grow up, hoping that it will be loved by everyone and become a beautiful scenery in Guangzhou, a part of the happy life of Guangzhou people, and an important part of Guangzhou's history and culture.

Edit: Bao Kuo

Source: Golden Sheep Network