River crossing bridges in Guangxi Zhuang Autonomous Region, China
Yinghua Bridge is located in Guangxi Zhuang Autonomous Region of ChinaNanningDomestic connectionJiangnan DistrictAndQingxiu District, onYong Jiang RiverAbove the waterway is one of the main urban roads in the southwest of Nanning.[1]
Yinghua Bridge was commenced on September 1, 2012;[2]The main bridge closure project was completed on September 26, 2014, and the whole line was completed;[3]It was opened to traffic on December 28, 2014.[1]
Yinghua Bridge starts from Fengjiang Road in the west, crosses Yongjiang Waterway, and ends at Liuhe Road in the east;The total length of the line is 1.017 kilometers, and the total length of the main bridge is 500 meters;The bridge deck is a two-way six lane urban trunk road with a design speed of 60 km/h.[4]
On September 1, 2012, the construction of Yinghua Bridge started.[2]
On September 26, 2014, the main bridge closure project of Yinghua Bridge was completed and the whole line was completed.[3]On November 18, Yinghua Bridge carried out the main deck casting asphalt concrete paving project;[4]On December 28, Yinghua Bridge was opened to traffic.[1]
Bridge location
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Yinghua Bridge is located in Nanning, Guangxi Zhuang Autonomous Region, China, connecting Jiangnan District and Qingxiu District;NorthingBaisha Bridge2.5 kilometers, 2.4 kilometers away from Wuxiang Bridge in the east;The bridge starts from the east section of Fengjiang Road in Jiangnan District in the west, crosses Yongjiang Waterway along Yinghua Road to Yinghua Road, and ends at the intersection of Yinghua Road and Liuhe Road;The section passing by this bridge is Yinghua Road.[5]
Yinghua Bridge is located in Nanning, Guangxi Zhuang Autonomous Region, China
Architectural design
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building structure
Overall layout
Yinghua Bridge is mainly composed of the main bridge on the water, the approach bridges on both banks, two towers, main cables, slings and each interchange ramp. The main bridge section is arranged from southwest to northeast.[6]
Yinghua Bridge is arranged from southwest to northeast
Design concept
The pylon of the main bridge of Yinghua Bridge is a single main cable suspension bridge, and the design inspiration for its shape comes from the Han Dynasty cultural relics unearthed in Pubei, Guangxi“Sheep horn button chime”The bridge tower has both classical charm and modern aesthetic feeling, implying music and dance in Yongjiang River and sound around Bagui, which fully demonstrates the rich cultural heritage and humanistic characteristics of Guangxi.[2]
The design of Yinghua Bridge tower is inspired by the "sheep horn button chime"
Design features
Structural characteristics
population
The tower of the main bridge of Yinghua Bridge is a single main cable ground anchored suspension bridge.
main beam
The main girder is a single box four chamber flat streamline full steel box girder, with a diaphragm set in the middle of the box girder. The top plate of the steel box girder is longitudinally necked with U ribs in the motorway and non motorway areas, and the steel box girder is equipped with plate necking ribs on the upper inclined web.
bridge tower
The main tower foundation adopts pile cap foundation, the lower tower column of the bridge tower is prestressed concrete structure, and the upper tower column and beam are steel structures.The steel tower section is a hyperbolic arc structure. The single side tower column is gradually merged into a semicircular section from two quarter circular sections upward in the longitudinal direction of the tower, and the tower columns on both sides are merged into an approximate circle at the top of the tower.The main tower is divided into a section along the height direction;T1 section is a prestressed concrete section, T2 to T9 I go up to the tower column steel section, where T2 is the section connecting with the beam, T10 is the cable saddle bearing section, and the top section is the tower crown section with modeling points;The segments are connected by welding.
Anchorage
The anchorage adopts the steel tie rod anchorage system, and the anchorage mode is the non adhesive post anchor bearing type;The anchoring system consists of cable strand anchoring connection structure and steel tie rod anchoring structure. The cable strand anchoring connection structure is a single cable strand anchoring unit. The cable strand direction corresponding to the pull rod direction Junyuqi is the same, and its error is adjusted with spherical nuts.
Main cable
The main cable of the whole bridge is a single main cable, which adopts prefabricated parallel wire strands, and the main cable strand is composed of high-strength galvanized aluminum mixed rare earth alloy coated steel wires.
reference material:[5-10]
Design parameters
Yinghua Bridge has a total length of 1017.763 meters, including 102.763 meters long and 51 meters wide Xi'an Approach, 277 meters long and 35.2 meters wide West Bank Approach, 500 meters long and 37.7 meters wide Main Bridge, and 138 meters long and 35.2 meters wide East Bank Approach;The total length of the ramp is 490.34 meters, including 200 meters for Qiaoling, 290.34 meters for subgrade, and 18.5 meters for width;The first tutorial is 600.43m long and 9.5m wide.The main tower is 100 meters high. The plane size of the bottom of the cushion cap is 16.6 × 16.6 meters, and the height is 5.5 meters.The full-length cable strand from the north anchorage to the south rivet consists of 91 pieces, and each cable strand steel wire consists of 127 pieces with a diameter of 5.2 mm.[5-6]
technical standard
Road grade
Grade I urban trunk road
Design speed
60 km/h
Lane setting
Two way six lane
Environmental category
C4
Design basis
100 years
Safety level
class a
Load standard
Automobile: city level A;Crowd: calculated according to relevant crowd load standards in Code for Design of Urban Bridges
In September 2018, the lighting project along the Yongjiang River comprehensive renovation coast was started, focusing on the lighting transformation of 15 river crossing bridges, beach green land, and housing buildings 24.1 kilometers along the coast. With the urban memory as the soul, the riverside culture as the rhyme, through the control of light and shadow changes and light and color brightness, a distinctive and colorful night scene was created, including Yinghua Bridge.[11]
Night View of Yinghua Bridge
Operation
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Fare system
On December 28, 2014, Yinghua Bridge was opened to traffic and the whole bridge was free of charge.[1]
Construction achievements
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Technical difficulties
construction technique
Side view of Yinghua Bridge
The following technologies are adopted in the construction of Yinghua Bridge:
1. Mass concrete construction technology of gravity anchor;[7]
2. Pushing construction technology of steel box girder;[8]
3. Construction technology for positioning and installation of curved arc steel tower;[9]
4. Construction technology of curved arc steel tower;[10]
5. Walking pushing construction technology for long and double slope steel box girder.[5]
Construction difficulties
Yinghua Bridge Crossing the River
The difficulties and characteristics of Yinghua Bridge in tower construction are as follows:
1. Steel tower Sister Dan is heavy.The maximum lifting capacity is 126 tons, and the maximum lifting capacity is 100 meters. The lifting is divided into 10 sections. The large tonnage floating crane lifting technology is used. The manufacturing and installation accuracy of the steel tower determines the line shape and quality of the tower body. The manufacturing and installation accuracy requirements are high.
2. The whole tower of Yinghua Bridge is 100 meters high, and there is no floor type support platform as the welding operation platform at the bridge site, so the high altitude welding operation environment is poor.
3. The wall plate is made of Q307qD steel with a thickness of 48mm. The welding requirements for thick plates are high, and the welding deformation of steel plates is large. The welding deformation of each segment affects the linear quality of the steel tower bridge at that time.
4. It is difficult to measure and control the docking positioning of tower segments at high altitude. Each segment can achieve rapid measurement and positioning, and it is difficult to ensure the steel tower line shape.[9]
Honor recognition
entry name
Honors won
Yinghua Bridge
2015 Nanning "Yongcheng Cup" Award
2016 China National Excellent Welding Project
2016 Guangxi Zhuang Autonomous Region Quality Project Award
The first prize of excellent design of China's national engineering construction projects in 2016
On November 21, 2018, the Yongjiang Night Tour Project was launched. Tourists can take the "Nanning Golden Spike" and "Nanning Peony" cruise ships to enjoy the night scenes such as Yinghua Bridge.[11]
Value significance
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Yinghua Bridge has been completed and opened to traffic, becoming a cross river channel connecting Liusha District of Qingxiu District and Jiangnan District. It is of great significance to facilitate the travel of citizens, improve the urban road network, expand urban space, improve the environment of urban districts, and enhance the regional economic and social development environment.(Comments of Nanning Urban Construction Group)[1]
