The 480-kilometer-long Mombasa-Nairobi Railway is the first section of a planned East Africa railway network. It connects Nairobi, the capital of Kenya, with Mombasa, the largest port in East Africa.The 480-kilometer-long Mombasa-Nairobi Railway is the first section of a planned East Africa railway network. It connects Nairobi, the capital of Kenya, with Mombasa, the largest port in East Africa.

The main line of Mombasa-Nairobi Railway is a single-line rail, with a designed passenger speed of 120km/h, freight speed of 80km/h and a designed capacity of 25 million tons. The railway is designed and constructed to the Chinese National Railway Class I. Mombasa-Nairobi Railway is the largest infrastructure construction project since Kenya’s independence, as well as the “Flagship Project” for achieving its national development vision of 2030, which was started in September 2014 and opened on May 31st, 2017.

The Mombasa-Nairobi Railway is an important initial fruit of implementing “The Belt and Road” Initiative proposed by Chairman Xi Jinping and the “Top Ten Cooperation Programs” of the Johannesburg Summit of the Forum on China-Africa Cooperation. It is a landmark project of China-Africa cooperation in “Three Networks and Industrialization” and production capacity. The completion and opening of Mombasa-Nairobi Railway is of great significance to promoting the development of Kenya and regional countries, accelerating the industrialization process in Africa and promoting “The Belt and Road” into the hinterland of Africa.

Xinzhu products applied: curved spherical bearing, rubber bearing, anchorage devices.

The TUAS WEST section of Singaporean Mass Rapid Transport is 8.7 kilometers long with 5 stations along. The entire line is erected. The products adopt British standards. The bearings used in the project are all made of stainless-steel materials, which is unprecedented in the industry in China.

Xinzhu products applied: pot bridge bearing.

The East-West Freeway in Algeria is the largest cash exchange project implemented since the founding of Algeria. The total length is 1216 kilometers. It is not only the main transportation artery running through the east-west direction, but also an important strategic route for the southern Mediterranean countries. The products adopt European standards.

Xinzhu products applied: mitigation and isolation rubber bearing, expansion joint for pot bearing.

3.1-kilometer-long viaduct, a vital communication line connecting capital Dhaka to Purbachal

Xinzhu products applied (European Standards): bridge bearing, expansion joint for bridge.

The Oran Multi-purpose Stadium, located in eastern suburb of Oran, Algeria, is a large civil construction project. It covers 290,000 m2 with a total building coverage of 59,000 m2 and is able to accommodate 40,000 audiences. It is the largest and most modern multi-functional stadium in Oran Province and even in western Algeria. The products Xinzhu supplied are made to European standards.

Xinzhu products applied: mitigation and isolation rubber bearing.

The Zemun-Borca Bridge is located in Belgrade -- the capital of Serbia, across the Danube River. The bridge is designed to be 1499 meters in length, 29.1 meters in width, and 22.8 meters in height. It is divided into four parts including the south approach bridge, the main bridge, the beach bridge and the north approach bridge. The Zemun-Borca Bridge is the first bridge in Europe built by Chinese construction companies. It is also the first infrastructure project completed since the “16+1” cooperation between China and Eastern European countries was initiated, as well as a successful exploration and model project under the China-CEEC cooperation mechanism.

Xinzhu products applied: spherical bearing, pot bearing, laminated rubber bearing, expansion joint, pre-stressed anchorage device.

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The newly built Fuzhou-Xiamen High-speed Railway is one of the national key projects of “The Belt and Road”. It starts from Fuzhou in the north, travels through Fuqing, Putian, Quanzhou, Jin, and finally reaches Xiamen. The whole railway line is a double-track high-speed railway, with a designed travel speed of 350km/h and a final length of 294.1 km. There are 85 bridges of 191.4 kilometers and 33 tunnels of 56.5 kilometers in the line, with a bridge-tunnel ratio of 84.3%.

Xinzhu’s patented product – high nickel weathering steel spherical bearing is applied in this railway. It has super marine corrosion resistance, which greatly increases the service life of the bearings and therefore reduces the maintenance cost.

Ludinghe Grand Bridge in Ya’an-Kangding Freeway (Bridge Inspection Vehicle)

Ludinghe Grand Bridge in Ya’an-Kangding Freeway is one of the main control projects of Ya’an-Kangding Freeway. It is a super-long-span steel beam suspension bridge built in high-altitude, high-seismic mountainous areas and complex wind fields. The bridge sits in the valley of Dadu River, whose deck is 239 meters higher than Dadu River. The weather conditions are changeable and the wind field is very turbulent where the wind speed reaches as high as 32.6 m/s. The main bridge is a 1100-meter single-span suspension bridge with a steel-concrete composite bridge system; the main girder is a steel truss girder with a truss width of 27m and a truss height of 8.2m; at the Ya’an bank, there’s the tunnel anchorage and the Kangding bank a gravity anchorage; at both banks, there’s the portal type reinforced concrete main tower based on a drilled (digged) hole cylindrical foundation.

One inspection vehicle is arranged on the whole bridge. The inspection vehicle has functions such as straight-line synchronization, automatic adaptation to gauge errors. It is also capable of maintenance operation and automatic leveling on a 12% slope, by which checking the top and bottom chords of the steel truss are possible on its hoistable platform within.

The bridge inspection vehicle can perform full coverage inspection on the top and bottom chords of the steel truss, bearings and its outer surfaces at the same time with high efficiency, while it minimizes the number of inspection vehicles to be arranged to the greatest extent and reduces the construction cost reasonably.

Ludinghe Grand Bridge in Ya’an-Kangding Freeway (Expansion Joint)

Ya’an-Kangding Freeway leads to the Tibetan area in West Sichuan. It is an important part of the horizontal Freeway G42 “Shanghai-Chengdu” and the connecting Freeway G4218 “Ya’an-Yecheng” in National Highway Network Planning, as well as an important section of Chengdu introduction line “Chengdu-Ya’an-Batang-Tibet” and the horizontal line “Kangding-Ya’an-Luzhou-Chongqing” in Sichuan Provincial Highway Network Planning. The route, at a total length of about 135 km, wriggles along G318 corridor and rivers, and travels through Ya’an City, Tianquan County and Luding County.

Ludinghe Grand Bridge, a 1100-meter span suspension bridge, is located in Luding County, Ganzi Prefecture. Its main bridge and approach bridge both use a 2000 unit-type multi-directional displacement comb-shaped expansion joint at the intersection, each 24.5 meters long and totally 49 meters. 

Ludinghe Grand Bridge in Ya’an Kangding Freeway utilizes the 2000 mm displacement unit-type multi-directional comb-shaped expansion joint independently developed by our company. So far, it is the expansion device of the largest displacement applied by Xinzhu.

Its application features are:

1. The spherical bearing at the bottom is able to meet the rotation requirement of a bridge above 0.05 rad.

2. The main bearing component tooth plate adopts high safety factor, which greatly improves the loading capacity of the structure and hence has a long service life.

3. It uses special installation processes which allows good flatness, high driving comfort and low noise, by which it receives unanimous praise from the proprietor and road management & maintenance departments.

Ludinghe Grand Bridge in Ya’an-Kangding Freeway (Bearings)

Ludinghe Grand Bridge in Ya’an-Kangding Freeway is located in Daduhe Gorge in Ganzi Prefecture. It is a suspension bridge built in the environment where there’s high altitude, high seismic intensity zone and complex wind field. This grand bridge is completed and opened in December 2018. It has a total length of 1,411 meters and a main span of 1,100 meters, which costs more than 1 billion RMB. It is a control project of Ya’an-Kangding Freeway, the artery into Tibet from Sichuan, also the path of life crossing Lu Mountain and Kangding earth-stricken areas. It creates the “two firsts”— it is the largest span steel truss suspension bridge under construction in Sichuan and Tibet, and it is also the world’s longest tunnel-type anchorage under construction. It also has “five first times”— for example, the first time in Sichuan Province that a drone is used to draw a pilot cable across the river, and the first time in China that a cable hoisting system is used to erect a kilometer-level steel truss beam in high-altitude canyon and complex strong winds. All of which marks it the “super project” in China’s highway industry.

Xinzhu patented products applied – loose cable saddle support, tension and compression type support, and elastic horizontal wind resistant support. Loose cable saddle support largely improves the stress condition of the base and reduces the construction difficulty; the tension and compression type support and the elastic horizontal wind resistant support can reduce the impact of the bridge on the tower by the cross wind, hence increases the life of the support and reduced the later cost.

Humen Bridge is located at Weiyuan Fort, Dongguan, Guangdong Province, the middle of Pearl River Delta which is 42 km away from Guangzhou. It starts in the east from Xiaojiejiao Village, Taiping Town, Dongguan, connecting Guangzhou-Shenzhen Highway, crosses Humen Waterway at the outlet of Pearl River and travels through Tangkeng, Panyu Town to connect Guangdong-Shenzhen-Zhuhai Freeway. The bridge, stretching to the east and west, is a significant part of the highway network of the Pearl River Delta, also an important transportation hub connecting the two sides of the Pearl River and the east and west of Guangdong. It is a grand bridge connecting Hong Kong, Macao and the coast of Guangdong.

The auxiliary channel of Humen Bridge adopts the span of 150m+270m+150m pre-stressed concrete continuous rigid frame, with a total length of 570m and a side-to-span ratio of 0.556. The bridge has exclusive carriageways for both directions. The top surface of the box girder is provided with a 2% cross slope, which is inclined to the left and right respectively with the corresponding design elevation as the origin while the bottom of the box girder remains horizontal.

The inspection vehicles are arranged by carriageways with a total of 6 variable cross-section girder bottom inspection vehicles. This inspection vehicle has functions such as straight-line synchronization, automatic-adaptation to gauge errors, detection of lateral support disengaging, detection of unsychronized lifting errors, and adaptation to maintenance of variable-height section concrete box girder.

The technologies of the bridge inspection vehicle can be widely used in full coverage inspection and maintenance of the variable-height section concrete box girder. It can greatly reduce the labor intensity and safety risk of maintenance personnel, improve operation efficiency, thereby saving costs and ensuring the quality of bridge inspection and maintenance.

The Guangfuhe Bridge is 1831 meters long, of which the main bridge is 600 meters long, the main span is 320 meters, and the main tower is 77 meters. It is a double-tower and double-cable-plane hybrid composite beam cable-stayed bridge with a width of 40 meters, a river surface of 10 meters, and 6 lanes in both directions totally.

At the time of construction, the bridge created “the five most”: double tower and double cable hybrid composite bear structure, which is rare in China; the width is the largest among the same type bridges in China; the largest bearing capacity is 16,000 tons. Jining municipal engineering has the largest single investment, with an estimated budget of about 585 million yuan; the municipal engineering construction in Jining is the most difficult that the bridge spans the railway, power and has a rather deep pile foundation.

Yangtze River No. 3 Bridge in Wanzhou, Chongqing, located at the archway of Wanzhou District, Chongqing, crosses the Yangtze River. The main bridge is a 1,730-meter double-stayed cable-stayed bridge. The cable tower uses a European-style diamond-shaped tower. The tower is 208.2 meter high. The girder is made of steel box girder, and the auxiliary span main girder is concrete main girder. The span is 4*57.5+730+4*57.5 meter. The total length of the bridge main line is about 2.12 kilometers. Its A section was undertaken by Road & Bridge International Co., Ltd. Its B section was undertaken by Sichuan Road & Bridge (Group) Co., Ltd.

Xinzhu’s modular expansion devices with displacements of 1760mm and 1600mm are successfully used in the Yangtze River No. 3 Bridge in Wanzhou, Chongqing, which is another major breakthrough after the 1600mm modular expansion device in Er’qi Yangtze River Bridge in 2010.

The application features of the product are: 

1、The main bridge and ramp expansion joints are skewed, which is the first of its kind in large displacement modular expansion devices in China.

2、 In order to adapt to the three-way rotation of the beam body, the support box is designed as a trumpet shape, and at the same time, a spherical support is designed at the bottom of the support beam, which can meet the rotation requirements of the beam body with a range of more than 0.05 rad.

3、The beam section steel of the main bearing component adopts a 130x90 section design, which greatly improves the bearing capacity of the structure and is more suitable for domestic traffic overload conditions.

4、The top surface of the section steel is designed with anti-skid grooves, and the driving friction coefficient is greater than 0.55, which effectively controls vehicle slippage.

5、The bottom of the expansion device is designed with a rigid limit system to prevent the single-group seam width of the expansion device from being too large.

Beijing-Shanghai High-speed Railway, also known as Beijing-Shanghai high-speed passenger channel, is one vertical line of China’s passenger dedicated networks of“four vertical and four horizontal lines”, and is also the project with the largest investment scale and high technical level in China’s “Medium and long-term railway network planning”. This line runs from Beijing South Railway Station to Shanghai Hongqiao Station with a total length of 1,318 kilometers. It runs through the three municipalities of Beijing, Tianjin and Shanghai and the four provinces of Hebei, Shandong, Anhui and Jiangsu, connecting the city cluster of Beijing, Tianjin and Hebei and the city cluster of Yangtze River Delta. The design speed is 380 km/h.

This railway uses the support exclusive for railway. The support adopts the structure for bridges based on the highest commonly used standards in China. It uses the systematic anti-corrosion processes of three times’ baking and three times roast’. And ultra-high molecular materials are used for the sliding plate to guarantee the service life of the support.

The Hangzhou Bay Bridge is a sea-crossing bridge connecting Jiaxing City and Ningbo City in Zhejiang Province, China. It is located above the Hangzhou Bay waters. It is part of the Shenyang-Haikou Freeway (National Freeway G15) and an important part of the urban expressways in northeastern Zhejiang Province. The overall plane of the bridge is an S-shaped curve, composed of the North Channel Bridge, the South Channel Bridge, the approach bridge and the mid-sea platform; the navigation bridges of the North and South Channels are each arched, with an undulating elevation shape. Hangzhou Bay Bridge is a large-scale transportation infrastructure designed, invested, built and managed by China. It is an important milestone in the history of China’s cross-sea bridge construction. The bridge has one north and one south waterways, of which the north waterway bridge is a diamond-shaped double-tower double-cable steel box girder cable-stayed bridge with a span of 448 meters, and the navigation standard is 35,000 tons; the south waterway bridge is a A-type single-tower double-cable steel box girder cable-stayed bridge has a navigation standard of 3000 tons. Except for the north and south channel bridges, the remaining approach bridges use pre-stressed concrete continuous box girder structure ranging from 30 to 80 meters. The bridge is designed as a six-lane expressway in both directions with a design speed of 100 km/h and a designed service life of no less than 100 years.

Hangzhou Bay Bridge uses Xinzhu’s spherical steel supports made of weathering alloy steel materials that can greatly improves the weathering performance of the support, which reduces the maintenance cost in the later period.

The Hong Kong-Zhuhai-Macao Bridge spans Hong Kong, the mainland and Macao, and is a large cross-sea channel connecting the Hong Kong Special Administrative Region, Zhuhai City, Guangdong Province, and the Macao Special Administrative Region. It is an integral part of the Pearl River Delta regional loop in the National Highway Network Planning and spans Lingding Bay as a key project. It is another super project after the Three Gorges Project, the Qinghai-Tibet Railway and Beijing-Shanghai High-speed Railway. It is the largest-scale, highest-standard, most technically complex cluster project integrating bridge, island and tunnel in the world today. It is a milestone project for China to become a powerful country from a major bridge and transportation construction country.

Because steel bridges are exposed to the natural environment for a long period of time and bear alternating loads at the same time, the steel structure will be eroded by the environmental medium and the action of the atmosphere, especially in some areas with poor environmental quality, which will often cause corrosion of the steel bridge. Under the influence of alternating fatigue stress, it will be further accelerated, thereby reducing the durability, safety and service life of the steel bridge. The common phenomena in the operation the steel bridges mainly include corrosion of steel structures, fatigue defects of welds and loose bolts. Therefore, it is necessary to consider later maintenance and maintenance platforms at the initial stage of bridge design.

Products application

Inspection Vehicle for the Bottom of a Girder

The inspection vehicle for the bottom of Hong Kong-Zhuhai-Macao Bridge has the functions of changing track through piers(towers), passing through expansion joints, synchronous straight walking, large gradability, environmental protection and energy saving, and excellent durability.

The bridge inspection vehicle technology can be widely used in continuous operation of multiple spans and multiple joints such as the outer surface of steel box girder and concrete box girder, which can improve the operation efficiency and reduce the construction cost.

Inspection Vehicle for the inside of a Girder

The inspection vehicle for the inside of a girder for Hong Kong-Zhuhai-Macao Bridge has the features of automatic sealing doors, spanning expansion joints, novel appearance, environmental protection and energy saving, and excellent durability.

The bridge inspection vehicle technology can be widely used in continuous operation of multiple spans and multiple joints such as the outer surface of steel box girder and concrete box girder, which can improve the operation efficiency and reduce the construction cost.

Inspection vehicle for Cable Tower

The Qingzhou inspection vehicle for the cable tower of Hong Kong-Zhuhai-Macao Bridge is capable of synchronous hoisting, telescoping of the gondola, slewing of the boom, telescoping and lifting of the boom, overspeed and overload protection, and fall protection.

The inspection vehicle for cable tower can be widely used for the full-coverage inspection of the cable tower-like structure, convenient for disassembly, transportation and storage, and meets the requirements of bridge landscape design.