Bridge, it's the city business card. When it comes to bridges on the huangpo river in shanghai, they have different forms and characteristics. They have brought together both sides of the river, changing the pattern of urban development. In recent days, the first steel track on the lower level of the first hwangura river bridge, the lower bridge, in shanghai, was successfully dismantled and the main bridge of matsuura entered the formal rehabilitation phase。
The matsuura bridge, located in the south-east of the pine river region, was originally a double-storey steel-coated steel bridge, upper road and lower railway. The matsuura bridge, which has been rewritten in the history of the hoangura river, will be the first of two: the matsuura bridge, which is nearly 1. 9 kilometres long, is the largest ever to be renovated in the hoangura river; it will be the first “low-road bridge” in huangura river in 2019。
Since the construction of the bus in 1976, the matsuura bridge has entered the “unsure” year. How can this bridge, which is called the big mac, be the "nature of youth"
The whole thing's up
“the structure of the matsuura bridge has been significantly modified and the bridge has been upgraded from the pilot to the main bridge.” the deputy chief engineer of the general institute for engineering and research (group) ltd. In shanghai stated that the top upgrade was a “microstart operation” designed to circumvent the entire bridge, minimize construction time, save investment and reduce the impact on transport。
Bridgetops vary from sector to sector. Since the standards for the early bridge access to the matsuura bridge were no longer in line with current requirements, the main section of the bridge, which was 419. 6 metres long, would rise to an overall height of 20 cm. As required by the design, the lower leg of the pilot bridge is to be converted from rail transport to a slow passage, and the original bridge would need to be upgraded, shortened and then sloped to meet the movement needs of people and bicycles。
Top-up technologies are not uncommon in urban construction. Shortly ago, the taichu house of the jade buddhist temple was flattened with a staggered lift of 1. 05 metres up the entire building and 30. 66 metres north. “although the height of the top of the matsuura bridge is only 20 cm, the difficulties vary due to the different construction forms.” chen liang, deputy chief engineer, bridge design institute, municipal general college, said that the bridge was under the river and was more than 20 metres high and that it was difficult to find a support point at the top of the bridge. The project engineers carried out numerous brainstorms and innovatively applied the long-range synchronized hydraulic top-up technology to bridges of this size, resulting in an overall top-up construction technique for the bridge with a two-storey bridge across a wide radius. This technology has also created a pioneer river at the top of the bridge of a two-storey bridge。
Shaping the slow bridge with memory
It is well known that the hong kong bridge is now fully motorized. With the transformation of the matsuura bridge, this not the grandest and most beautiful bridge will be filled with “personality” and will be the first transborder bridge in the huangura river to allow people to cross the river directly with bicycles。
With the construction of the golden hill branch of the railway in 2012, the lower line of the matsuura bridge is no longer operational and has been abandoned. Today, the space will be reused and the railway layer will be transformed into a slow-moving system for pedestrians and bicycles。
In recent years, as the concept of “modernity as usual” has gained prominence in urban renewal, bridge experts have been thinking about how to keep bridges as a city memory for citizens. In comparison to the white bridge and the zhejiang road bridge, which are more than 100 years old, the matsuura bridge is “young” in the bridge boundary, although engineers try to retain it as it is during the renovation. In slow lanes, engineers use a humanized landscape design, retain parts of the old railway structure and modify marking lines for the separation of adult vehicles. While walking on the matsuura bridge, pedestrians can still feel their breath。
“technology works, 100 years old, cannot render bridges unusable by overprotecting them. "hang hae said that it is important to preserve the culture of the city. As a result, the lower bridge of the matsuura bridge was primarily protected, while the upper bridge took into account the need for passage and significantly widened the old two-way lane to six-way lanes. With closer communication between the golden mountains and other shanghai regions, the two-way six lanes will effectively reduce traffic pressures on the kiosk road and increase the overall ability of the g320 country lanes。
The whole bridge has been renovated
Despite the scale of the renovation, matsuura bridge was “stopping”. According to the construction plan, the matsuura bridge was to dismantle the lower railway facilities before being reinforced and renovated. The lower bridge is fully connected, with the opening of the lower non-motorized lanes and sidewalks followed by the closure of upper traffic and the construction of the upper bridge and the extension of the upper lead bridge. The entire renovation will last for two years。
During the renovation of the lower floor, the matsuura bridge operated a night construction programme that closed between one and two lanes between 2330 and 5. 30 p. M. The following day, opening up traffic during the day to ensure the proper operation of the bridge. “the effect on traffic will be minimized during the bridge's renovation.” yanhai says. The construction of the matsuura bridge was carried out by the shanghai metropolitan council using the epc (design and construction integration) master contract model, which reduced the original period of work by three to five months and was referred to as the “turnkey project”. “the impact on transport can only be fundamentally reduced if the renovation works are completed in a time-consuming and time-consuming manner, subject to quality assurance.” the epc master contracting model has now become the main management modality for the bridge maintenance and renovation works。
We can use it for another 50 years
“the modified matsuura bridge will be used for another 50 years.” chen liang indicates。
Despite the relative youth of the matsuura bridge, the engineers were able to offer their skills in repairing the 100-year bridge. The main embroidery of the matsuura bridge has been partially deformed, but due to its particular structure, the repairs can only be carried out without external support. The engineers used the technical experience of repairing the white bridge to correct the damage。
The parts and components of the bridge were not entirely replaced, but rather based on the restoration techniques of the zhejiang road bridge and the white bridge, the rational use of the old and new building block connections, the re-picking and improvement of the near-lost docking process, the adoption of targeted sand removal and preservation coating programmes, depending on the parts of the building blocks, and the study of the machinery of steel structure corrosion。
The use of steel surfaces at the matsuura bridge, where damage is closely linked to the design, construction and overload of the bridge, is a major challenge that has long plagued the bridge community. It was stated that, following a technical cut-off, the present rehabilitation of the matsuura bridge would further enhance the resilience and economic performance of the bridge, a steel-concrete orthodox combination of bridge structures that had been partially applied during the renovation of the zhejiang road bridge and would now be fully replicated at the matsuura bridge。
Ten years ago, shanghai received a letter from the british designer of the white bridge reminding him that the bridge “was designed for 100 years and is now due to be repaired” and that some maintenance advice was given. “now, we can monitor the state of the bridge through information management, and find and solve it in a timely manner.” the matsuura bridge is working on the joint design of the traditional conservation approach with the health monitoring system and on the development of a specialized maintenance manual to improve its electronicization. Previously, in the maintenance of the nanpo bridge and yangura bridge, engineers developed a bridge transport management system based on bim (building information model) technology to facilitate later health monitoring and maintenance of these landmark major works。
