Lu Pu Bridge

Lupu Bridge is located on the central axis of Shanghai 2010 World Expo site. It is the first steel arch bridge in the world and the largest span arch bridge in the world. It is also the first large-scale arch bridge in the world to be completely connected by welding process (except for the bolted joint at the closure interface). The total length of welding seam on site is more than 40000 meters, which is close to the total length of Shanghai inner ring elevated road. Lupu Bridge has the same function of tourism as Sydney Bay Bridge in Australia.

Different from Nanpu Bridge and Yangpu Bridge, Lupu Bridge, the world's first arch, places the sightseeing platform on the top of the arch rib like a giant bow. Tourists can take the high-speed sightseeing elevator to the 50 meter high bridge deck of Lupu Bridge, climb up the footbath along the arch rib of the bridge, climb about 280 meters on the back of the giant bow, and climb to the top of the arch rib like a 100 meter high, then reach guanguangping, which is the size of a basketball court This is the first time.

Lu Pu Bridge

Lupu Bridge is a river crossing channel connecting Huangpu District and Pudong New Area in Shanghai, China. It is located on the Huangpu River waterway and is one of the components of Shanghai inner ring expressway.

Lupu Bridge was built in October 2000;

The closure of the main bridge was completed on October 7, 2002;

It was put into operation on June 28, 2003.

Lupu Bridge starts from Shanghai North South viaduct in the south, crosses Huangpu River Waterway in the north, and ends at Luban Road Interchange in the north. The total length of the line is 8722 meters, and the total length of the main bridge is 750 meters. The bridge deck is a two-way six lane urban expressway with a design speed of 60 km / h, and the total investment of the project is 2.2 billion yuan.

Construction process

In August 1999, Shanghai Huangpu River Bridge Engineering Construction Office solicited the design scheme of Lupu Bridge.

On October 25, 2000, construction of Lupu Bridge started.

On October 7, 2002, the closure of Lupu Bridge was completed.

On June 28, 2003, Lupu Bridge was put into operation.

In 2010, in order to welcome the opening ceremony of Shanghai World Expo, the lighting equipment of Lupu Bridge was replaced.

In September 2018, in order to welcome China International Import Expo, Lupu Bridge was painted.

Bridge location

Lupu Bridge is located in the Huangpu River section of Luwan District, Shanghai. It is located in the center of the city. It is the South extension of the North-South viaduct in the urban area. The bridge is 7.2km away from Xupu Bridge in the West and 3.5km away from Nanpu Bridge in the south. It starts from Shanghai north-south viaduct in the south, crosses Huangpu River Waterway in the north and ends at Luban Road Interchange in the north. Its Puxi Section is located on the North Bank of Huangpu River in the south of Luwan District in the center of the city, connecting South from Shanghai north-south viaduct, and Pudong section is located in the south of Pudong New Area.

Architectural design

building structure

Overall layout

Lupu Bridge is composed of main bridge on water, arch ring, arch rib, land Pudong, Puxi approach bridge and interchange ramp. The main bridge section is arranged from southeast to northwest.

 

Design concept

In Lupu Bridge, the body of the bridge is in a beautiful arc shape, such as Changhong lying wave, flying over the Pujiang River. According to the characteristics of the bridge itself in a wide water area, and in order to make the bridge well integrated into the whole urban space, the designer takes the water color of the river as the background of the main body of the bridge, so that the river can reflect the magnificent and beautiful reflection of the bridge, and make the bridge itself become the appreciation of citizens and tourists Finally, the scheme of half through arch bridge is selected.

 

 

Lupu Bridge is a curved half through arch bridge, which can not only shorten the span of the main bridge to the maximum under the premise of ensuring the requirements of the main channel, but also distinguish Nanpu, Yangpu and Xupu bridges with its gentle and smooth curve and closed and transparent space.

 

 

Design features

The main bridge of Lupu Bridge is a spatial basket half through arch beam composite system steel arch bridge. Strong horizontal cables are arranged between the cross beams at both ends of the main bridge to balance the horizontal thrust of the mid span arch rib. The stiffening beam is supported on the arch rib by suspenders or columns; the side span stiffening beam is consolidated with the arch rib at the intersection of the mid span and the side span arch beam; the two ends of the mid span stiffening beam are supported at the intersection of the mid span arch beam On the beam at the confluence, the end support is a longitudinal sliding support, and damping limiting devices are set horizontally and longitudinally.

 

The cross section of the arch rib of Lupu Bridge is gyroscopic, and the arch rib is stiffened by T-type; the cross section of the tie beam in the triangle area of the side span is closed steel box beam, and the side span tie beam is consolidated with the arch rib, column, cross beam at the end of the side arch, and cross beam at the joint section of the middle span arch beam; the middle span tie beam is an open steel box beam supported on the arch rib by suspenders, and the two ends are connected with the cross beam at the joint section of the middle span arch beam by bearings.

 

Design parameters

Lupu Bridge has a total length of 8722 meters, and the planned shoreline width of Huangpu River at the bridge site is 480 meters. The main bridge has a total length of 750 meters, with (100 + 550 + 100) meters span arrangement, rise span ratio of 1 / 5.5, vertical curve radius of main bridge deck of 9000 meters, arch rib top width of 5 meters, bottom width of 3 meters, plane inclination of 1:5, arch foot transverse bridge spacing of 51 meters, arch top transverse bridge spacing of 11 meters, and total bridge deck width of 29.8 meters, with a total bridge deck width of 1.5 meters Two way six lane, of which the main approach six lane is 25.5m wide, four lane is 18m wide, ramp two lane is 8.5m wide, single lane is 7.5m wide; the maximum longitudinal slope of the main line is 5.0%, the maximum longitudinal slope of the ramp is 6.4%, and the standard cross slope is 2%.

 

 

Equipment and facilities

Lighting facilities

In order to welcome the opening ceremony of 2010 Shanghai World Expo, the overall shape of Lupu Bridge is intended to be a rainbow flying across the sky; the rainbow in the sky is displayed with LED dynamic lights, and contrasts with the white Nanpu Bridge.

 

Electronic monitoring

As of September 2018, electronic police and other traffic monitoring equipment have been installed in the whole section of Lupu Bridge.

 

Sightseeing facilities

As of May 2009, tourists can take the high-speed sightseeing elevator directly to the 50 meter high bridge deck of Lupu Bridge, climb up the steps along the arch rib sidewalk of the bridge, walk more than 300 steps, climb to the top of the 100 meter high arch rib, and stand on a sightseeing platform the size of a basketball court to view the beautiful scenery of the Pu River.

 

Operation

Fare system

In February 2000, the Shanghai Municipal Committee of the Chinese people's Political Consultative Conference (CPPCC) submitted the proposal of "some suggestions on the negative effects of collecting river crossing fees and resolving contradictions"; in May of the same year, the Shanghai municipal government announced to cancel the fees for river crossing tunnels and bridges, including Lupu Bridge.

 

Traffic matters

As of April 17, 2015, due to the physical examination of Nanpu Bridge, small trucks are allowed to pass through Lupu Bridge.

 

Construction achievements

Technical problems

construction technique

In the construction design of Lupu Bridge, 3D solid modeling virtual construction technology is adopted. It is a combination of CAD, parametric solid modeling and assembly modeling By using MDT software and self-made expansion module, all the components of the steel structure of Lupu Bridge are built in a three-dimensional space model by means of three-dimensional solid modeling. In the three-dimensional model, the size of each component is corrected, especially the joint of components It can reduce a lot of manual operation and calculation work of designers, and avoid calculation errors or errors; because the shape of Lupu Bridge is particularly complex, this method can effectively and accurately solve various problems in the process of bridge construction.

 

Construction difficulties

Lupu Bridge is a half through arch bridge, but in the construction of middle span arch rib, the main technical difficulties are: 1, Including temporary cable tower, stay cable and anchor box, temporary wind support, walking and anchoring measures matched with arch crane, installation and operation of scaffold system, etc.; ② construction control is difficult, arch rib itself is a complex spatial structure, and the arch rib construction process is also affected by climate, sunshine and other external conditions, which requires that the arch rib of Pudong and Puxi should be in the construction process The three-dimensional coordinate of the three-dimensional structure is always controlled within the design scope; ③ the installation requirements of closure are high, which are greatly affected by temperature, wind, load and other factors.

 

Scientific research achievements

Cultural characteristics

scenic spot

In March 2019, Shanghai Pujiang "fast tour line" opened for trial operation, and Lupu Bridge belongs to the "elite Tour" of Pujiang.

 

Value significance

Lupu Bridge is built after Nanpu Bridge

Chinese PinYin : Lu Pu Da Qiao