China Railway No.3 Engineering Group Co., Ltd. has successively solved the construction problems of bridges in complicated mountainous area, bridges with special structures as well as river/ocean-crossing bridges with deep water foundation. It also mastered the construction technologies of various bridge types including continuous beam bridge, continuous rigid frame bridge, arch bridge, cable-stayed bridge & composite structure bridge. Many key technologies have reached internationally leading / advanced levels, ensuring the safety of bridge structures.In the field of bridge engineering, China Railway No.3 Engineering Group Co., Ltd. has formed a total of 64 scientific & technological achievements,  of which 52 have reached the international leading & advanced level, 64 obtained the science & technology awards at / above the provincial / ministerial level, 84 construction methods were developed (including 9 national methods), & 184 patents were authorized (including 40 patents for invention).

The prefabricated technology of simple supported beam bridges has maintained the industry leadership. As early as 1975, China Railway No.3 Engineering Group Co., Ltd. independently developed a 16m pre-tensioned beam, which was then mass-produced. Currently, it owns bridge works (Boming, Shexian, Xinzheng & Huizhou (Taimei)), which integrate with North Datong-Puzhou Railway, Handan-Changzhi Railway, Yangquan-Shexian Railway, Beijing-Guangzhou Railway & Beijing-Kowloon Railway via the connecting line. In 1982, it designed & manufactured the pre-tensioned detachable steel bed suitable for mobile beam fabrication, which was the first in the field. Such bed was reviewed by the Construction Department of the Ministry of Railways to have reached the domestic leading level & gained great influences as well as huge economic benefits within the field. In 2016, the heavy-haul T-beam of the Inner Mongolia-Jiangxi Railway undertaken by China Railway No.3 Engineering Group Co., Ltd. was successfully affirmed with the high score of 94.0, showing the leading domestic level in the manufacturing of heavy haul railway T-beams. Into the era of high-speed rail in 2005, it took the lead in studying the prefabrication technology of a 900-ton double-line simply supported box beam of prestressed concrete with high-durability & reaching the mass production conditions in the full line. This technology has reached the international advanced level & won the third prize of Shanxi Province for Scientific & Technological Progress. Meanwhile, the beam manufacturing process of high-speed rail continued to innovate in such high-speed railways as Zhengzhou-Xi'an High-speed Railway, Wuhan-Guangzhou High-speed Railway, Guangzhou-Zhuhai Intercity Rail Transit, Beijing-Shanghai High-speed Railway, Shijiazhuang-Wuhan High-speed Railway, Hangzhou-Ningbo High-speed Railway, Datong-Xi'an High-speed Railway, Shanghai-Kunming High-speed Railway & other high-speed railways, constantly maintaining an industry-leading level. By the end of 2016, it had undertaken beam fabrication for Beijing-Hebei Section of Beijing-Shenyang Passenger Line, Beijing-Zhangjiakou Intercity Railway, Taiyuan-Jiaozuo High-Speed Railway, Chifeng-Kazuo High-speed Railway & other railways, with a total task amount of 16,000 beams.

The prefabrication technology of special bridge has advanced triumphantly & achieved the domestic leading level. In 1993, the 10m & 16m reinforced concrete beam of ultra-low height (SRC beam) developed for Beijing West Railway Station filled the technical gap of prefabricated beams of ultra-low height. In 2004, the technical problems of the upside-down T-type PC track beam & RC beam with high-level-pouring & high-precision curve were overcome in Chongqing Light Rail. The developed construction technology of prestressed track curved beam reached the international advanced level, winning the third prize of Chongqing Municipality & China Railway Corporation for Scientific & Technological Progress. In 2005, China Railway No.3 Engineering Group Co., Ltd. undertaken the prefabrication of segment beam (short-line match method) of Guangzhou Metro Line 4, becoming the first to use segment beams in large scale in Guangzhou. It developed rapidly in the field of segment beam fabrication. In 2014, it took the lead in applying the BIM technology to 48m segment beam fabrication in Baoji-Lanzhou High-speed Railway Project. With internally advanced technology level, it won the third prize of China Railway Corporation for Scientific & Technological Progress. In the same year, the light segment box beam prefabrication project with fully external prestressed thin wall (short-line match method of highway) undertaken by the company successfully output beams, winning the bid for the double-track continuous rigid multi-span segment beam prefabrication project of Guangzhou Metro Line 14. Subsequently, it successfully contracted the prefabrication of pre-tensioned U-beam of Shenzhen Metro Line 6, & the advantages of technology superiority in market competition were further highlighted.

Arch bridge construction technology has been improved gradually. The involvement of China Railway No.3 Engineering Group Co., Ltd. in arch bridge construction can be traced back to Yingdinghe No.7 Bridge of Fengtai-Shacheng Railway Line II & Laochanggou Yixiantian Bridge of Chengdu-Kunming Railway which were built in 1966. As a half-through reinforced concrete arch bridge with the span of 150m, Yongdinghe No.7 Bridge won the National Science & Technology Conference Quality Award. Yixiantian Bridge has the largest span among railway stone arch bridges & won the National Railway New Technology Grand Prize. With the constant innovation of arch bridge structures & types as well as the application of new materials in recent years, China Railway No.3 Engineering Group Co., Ltd. has continued with its research & develop, overcome difficulties, & succeeded in building Luobuxi Major Bridge (deck X-arch bridge with the largest span in Asia) of Yichang-Wanzhou Railway, half-through tied-arch bridge in Linfen, Shanxi, Guangya seagull half-through steel box arch bridge of Liuzhou as well as other bridges. Many core key technologies have reached the international advanced level. Guangya Major Bridge in Liuzhou, Guangzhou is a steel box arch bridged combining a dual-opening half-through tied arch & triangle rigid frame piers, which once again filled the gap of designing & constructing such bridges as China's first bridge that used steel box as the slant legged rigid frame pier, winning the first prize of China Railway Corporation for Scientific & Technological Progress, the Luban Prize for Construction Project & other honors.

The construction technology of cable-stayed bridge continues a new chapter. Among China's railway construction enterprises, China Railway No.3 Engineering Group Co., Ltd. is one of the earliest companies with the ability of building large-spanned cable-stayed bridges. Linjiangmen Major Bridge of Jilin, built & put open to traffic in 1994, was China's third cable-stayed bridge with the span of over 250m back then. The climbing formwork construction technology of the 62m main tower, new cable-stayed long cradle as well as round-end reinforced concrete open caisson won the second prize of Ministry of Railways for Scientific & Technological Progress. Later, it successively participated in the construction of famous milestone cable-stayed bridges in the development history of China's cable-stayed bridge. It also participated in such projects as Shanghai Nanpu Bridge, Yangpu Bridge & Xupu Bridge, respectively won Magnolia Quality Project Award & China Municipal Engineering Gold Cup Award. In the new century, China Railway No.3 Engineering Group Co., Ltd. successively undertook the construction of Yujiang Double-track Super Major Bridge of Nanning-Guangzhou High-speed Railway, Chaobaihe Super Major Bridge of Beijing-Shenyang Passenger Line, Yuxihe Super Major Bridge of Shangqiu-Hangzhou High-speed Railway & other bridges, of which the comprehensive construction technology of Yujiang Super Major Bridge won the first prize of Shanxi Province for Scientific & Technological Progress. In 2013, the construction of the cable-stayed bridge for Hangzhoug-Changsha High-Speed Railway continuously created six domestic records & won National Quality Project Award. CCTV fully reported the bridge's swinging. The achievements relying on the technological innovation attracted orders of high-grade, precision & advancement one after another. Chaobaihe Super Major Bridge of Beijing-Shenyang Passenger Line, undertaken in 2016, was the world's first asymmetrical low-tower cable-stayed bridge of high-speed railway, also the prestressed concrete low-tower bridge with the largest span. Yuxihe Super Major Bridge of Shangqiu-Hangzhou High-speed Railway was the double-tower steel box truss girder truss girder with the largest span & the speed of 350km/h.

The construction technology of composite bridge is rewarding. It is highly respected in the field of bridge because of its excellent structural force characteristics & beautiful appearance. China Railway No.3 Engineering Group Co., Ltd. has kept up with the pace of the times, actively organized technological research & development & achieved outstanding performance in such structural fields as beam arch combination & steel-concrete combination. In the field of beam & arch combination structure, it developed the construction technologies & tooling with international advanced level, which were successfully applied to the construction of Xiaolan River Super Major Bridge of Guangzhou-Zhuhai Intercity Rail Transit, Super Major Bridge of Beijing-Shanghai High-speed Railway crossing over Beijing-Hangzhou Grand Canal, simply supported 1-125m arch bridge of Qingdao-Lianyungang Railway, simply supported 1-144m arch bridge of Jinan-Qingdao High-speed Railway, simply supported 1-144m arch bridge of Huaihua-Hengyang Railway as well as other bridges. In the field steel-concrete combination structure, it developed construction process & acceptance standards for PC beam bridge of corrugated steel web, reaching international advanced level. The developed cast-in-place construction method of prestressed concrete continuous box girder with corrugated steel web was rated as a national construction method, while the formed construction process standards applied to be an industry norm in Henan Province.