Source: Pioneer magazine December 2021 issue
The building of the sky on the green "ring"
Text｜Reporter of this magazine Chen Tingting
Chengdu Ring City Ecological Park is dotted with 78 bridges. They are either Shu style or international fashion, drawing beautiful arcs for the city skyline. These bridges are an important hub connecting the greenway and have also become unique and charming city logos.
Beads form a chain to form a slow urban system
Bridge For the city, it records history, witnesses changes, and carries the future.
is a city with dense water networks and many river bridges. "The river is made of many bridges", when it comes to the bridges in Chengdu, from the historic Wanli Bridge and Jiuyan Bridge to the popular Internet celebrity Wuchazi Bridge and Ruyi Bridge... They connect rivers and become a different scenery in the city.
Nowadays, Chengdu is seen from a high place, and the entire Chengdu Plain is a big park. The cascading tall buildings and roads are surrounded by a 100-kilometer-long ecological park like an emerald necklace. On this green "ring", 78 new bridges were built. On the afternoon of December 17, 2021, as the 16,000 tons of cross-Chengdu Railway Bridge completed a 103.5-degree rotation in the air, the greenway scroll composed of 78 bridges was spread out.
According to Pan Xia, deputy director of the General Engineering Office of Chengdu Tianfu Greenway Construction Investment Group Co., Ltd., at the beginning of the establishment of the city-ring ecological park project, the spatial structure of the four-level service system was clarified by connecting greenways, and the bridge played an important connecting role in it. It is these bridges that cross highways, municipal roads and rivers, seamlessly connecting 121 parks across the ring, forming a 100-kilometer ring-shaped barrier-free urban slow-moving system.
At the same time, due to the connection of bridges, the greenway system has also become a fast dedicated channel for disaster relief and risk avoidance in extreme situations, improving rescue capabilities and improving urban emergency shelter function. The city-ring ecological park is surrounded by a circle, and all roads entering and leaving the city have intersections. The greenway bridges that cross over these roads are also the beautiful business card of the city-ring ecological park. With the style of "one bridge and one scenery", it shows the cultural heritage of the characteristic park and the unique ingenuity of the designer.
Safe and comfortable Provide an excellent travel environment
With the development of social economy, bridges extend more characteristics of serving cities in addition to exercising the basic functions of road traffic. The bridges on the city-ring ecological park greatly improve the safety and comfort of the greenway and provide citizens with a superior travel environment for easy travel.
Han Xing, head of the bridge professional of the General Engineering Office of Chengdu Tianfu Greenway Construction Investment Group Co., Ltd., introduced that all bridge designs in the city-ring ecological park follow the design specifications of the footbridge. The slope of the bridge does not exceed 3.5 degrees, making it more comfortable to ride and walk. On the longer bridge, a rest platform is specially designed so that
people can rest and sit while walking; the second phase of the bridge deck adopts thin layer paving that is more comfortable to ride and run.
Each bridge is designed according to the theme of each park and combined with the style of each area in Chengdu. For example, in the Cross-Wenchang Road Bridge, which is built with the theme of "her town", the hibiscus color and lace mechanism are extracted, integrating the mechanic beauty of the bridge; the Broken Shuiyun Characteristic Park is designed, and the colorful pastoral and western Sichuan mountain compositions are extracted by the park's land landscape, and the viewing platform on the bridge is designed, allowing people to miss the past while looking west.
The entire greenway has a comprehensive color distribution, and the bridge fits the colors of the area in it and is coordinated with the surrounding environment. High-tech Orange, Pidu Red... Walking on bridges of different colors, you can know what area it is. “78 pedestrian landscape bridges are relatively rare in bridge construction across the country."Han Xing introduced that in the same area, the bridge presents a similar style. As the greenway extends, it spans to different areas. Walking on the bridge, you will change the style of the bridge and clearly feel the changes in the regional space.
"Some bridges have added popular science functions, while others have increased interactivity with people. "For example, the Cheng'anyu Bridge matches the ecological concept. Hundreds of animal and plant specimens collected from Chengdu and the whole country were placed on the bridge railings, and leaves were simulated with wind-moving films, which is rare in China. "The height of the specimens is set at a height suitable for children to watch, so that they can learn. "Han Xing said.
One bridge and one scene Use art to light up the urban space
Bridge design, on the premise of satisfying functions, will inevitably become a beautiful scenery in urban road space due to its unique geographical location. "Light up the urban space with art has always been our goal. "Pan Xia said.
From the west side of Jiaozi Baiye Park, it looks like an airport expressway bridge with letter C, like an open arms, facing the people entering Chengdu's first stop in a welcoming manner; at the Renmin Road Bridge, the characteristic park of Shu Road, simulates the flashing agility of the galaxy through form and brilliance, just like the beautiful expectations of the ancient Shu people of "ancient trees through the sky"... The bridge on the ecological park around the city presents the "one bridge and one scene".
According to Pan Xia, adhering to the ecological value concept of natural healing in the greenway system, the design of the bridge avoids the spatial oppression brought by functional needs. The structural optimization of pedestrian bridges and the light beam body are the mechanical beauty that the bridge around the city pursues in terms of structure, and is also the clever concept of refined design.
The beautification of bridge decoration also plays a role that cannot be underestimated for the lighting of urban space. The bridges in the park adopt an integrated design, but do not Only considering the bridge decoration, a unified design is also adopted for the bridge piles, bottoms and under the bridge space, so that the bridge and the area are fully coordinated, aesthetics and value are combined, and functions and space are coordinated.
In addition, bridges play an important role in cultural interpretation and park interpretation. In terms of cultural interpretation, walking on the bridge deck, there is a sense of experience of "people are swimming in paintings", looking at the scenery under the bridge produces a culturally revitalized sense of time and space travel; in terms of park interpretation, using a bridge to memorize a characteristic The park uses a tone to distinguish a area around the city and has become a design concept that citizens and tourists who come to the park will find after careful savoring.
Modern bridges exist as transportation necessities in people's traditional cognition, showing a "monotonous and cold" appearance. In the construction practice of the city-ring ecological park, "On the whole of these 78 pedestrian bridges, their image and value are obviously bridges that transcend the traditional sense, and have transformed into a new highlight in Chengdu's urban space. "Gao Changjun, PhD, School of Architecture and Urban Planning, Tongji University, said that after coordinated design, the bridge has changed from the original single fast-pass function to a new place that integrates slow traffic, rest and viewing, communication and experience, etc. These design strategies adapt to local conditions highlight the artistic nature of Chengdu elements, are also operational in engineering practice, and take into account the interactivity of public participation.
Follow
33 Cross Wenchang Road Bridge
is located between Wuhou Avenue on the ring road. The design concept comes from the female perspective, taking the bride's veil as the creativity, and extracting the veil lace pattern as the design element to express the beautiful yearning for love and marriage. The overall internal arch shape of the bridge looks sacred and elegant. The name of the bridge is The "Blackweaver Bridge" has the elegance and romance of lace-like exterior shape, symbolizing the timelessness and softness of the beauty.
Tianfu Avenue Bridge
spans Tianfu Avenue and connects to the east and west area of Guixi Park. Because the nearby Global Center is a large-scale single building, the bridge adopts a simple and light design concept, supplemented by simple and bright lines, creating an atmospheric and modern feeling.Named "Tianfu Hongjin Bridge", it means that it is located on Tianfu Avenue, the main axis of Chengdu, and occupies a golden location. Through the frame view on the bridge, at a glance, Chengdu is carrying the lofty ambitions and a bright future.
Jackie Chan Avenue Bridge
Between Bailuwan Wetland Park and Huatian Wetland, cross Jackie Chan Avenue. Its facade shape draws on the gable contours of traditional Sichuan houses and the lines of the bridges, and organically forms a streamlined shape full of variation. The bridge is also known as the "house bridge", which echoes the traditional shape of houses and cover bridges. The design of the bridge gives people a feeling of going home. It is named "Jackie Chan·Bridge of Jingui". Returning in glory is the wish of every wanderer.
cheng'anyu Bridge
is located inside the ring highway, crossing 月'anyu Expressway ramp, Chengluo Avenue, Universiade Direct Connection Channel and other roads. The bridge is decorated with the city of Chengdu, ginkgo as the design element, and is decorated with different colors to represent the changes in the trees in the four seasons. Entering the bridge, it feels like being in a ginkgo forest with flying leaves and golden colors. Under the night, it has a unique style.
Jinjiang Bridge
starts from Guixi Ecological Park, crosses Jinjiang, connects to Zhonghe Wetland, with a total length of 694 meters. It is currently the longest unilateral cable-stayed footbridge in the world of . Use the characteristics of the structure to show a sense of rhythm and form the intention to pass through the bamboo forest; the cable-stayed cable is unique and elegant, like the artistic conception of a crown. As a representative work of greenway bridges, the bridge has achieved innovation in bridge design and construction technology in slow-moving traffic system, and won the World Footbridge Award in 2021.
crossing the Chengdu-Kunming Railway Bridge
starts from Jincheng Lake Park and ends at the Americas Extreme Sports Park. At the same time, crosses the Chengdu-Kunming Railway Line, Yuanhua Depot and the Ring Expressway. The design concept takes "water" into a tower, and from a distance, it looks like the water of life dripping into the lake, causing a ripple. The curved beam body is arranged like a curved stream winding out of Jincheng Lake, which is in line with the construction concept of the natural ecology of the greenway. The main tower is 95 meters high and is currently the highest pedestrian landscape bridge tower in Chengdu.
edit He Yaqi
proofreading Ran Huiyu Luo Mengdan
review Huang Xin
