en.Wedoany.com Reported - During the "14th Five-Year Plan" period, CCCC Second Highway Consultants Co., Ltd. (CCSHCC) drove transportation construction through technological innovation, completing multiple world-class projects including the Tianshan Shengli Tunnel, and achieved multi-point breakthroughs in the fields of integrated transportation, urban construction, and environmental ecology. The projects it participated in include China's first long-distance two-way 10-lane expressway—the Beijing-Harbin Expressway reconstruction and expansion project, the world's longest expressway tunnel—the Tianshan Shengli Tunnel, the world's longest-span double-span continuous arch bridge—the Shuangbao Extra-Large Bridge on the Chongqing-Hunan Expressway double line, as well as the self-developed second-generation horizontal directional drilling rig and the Wuhan Ziyang Lake "Great Lake+" renovation project.
On December 26, 2025, the world's longest expressway tunnel—the Tianshan Shengli Tunnel—and the Urumqi-Yuli Expressway it belongs to were fully opened to traffic, achieving a "20-minute crossing of the Tianshan Mountains." This project was designed by CCCC Second Highway Consultants Co., Ltd. (abbreviated as CCSHCC). Feasibility studies began in 2010, and it took 16 years to overcome the challenges of constructing an ultra-long tunnel in a high-cold, high-altitude environment. In the design, the company innovatively adopted a "three tubes + four shafts" scheme, achieving the rescue goal of "second-level alarm, one-minute dispatch, and five-minute arrival at the accident scene."
During the "14th Five-Year Plan" period, the company anchored its strategic goal of becoming a "world-class engineering consulting group" and built a business layout of "one excellence, two strengths, and four-wheel drive." In the highway sector, it undertook the design of the Duku Expressway, a national backbone corridor for "exiting Xinjiang and entering Tibet"; built a digital full-chain system in the Guanghui Expressway reconstruction and expansion project, the nation's first fully digital delivery project; proposed an 8-to-16 lane cross-section scheme for the Quanzhou-Xiamen section capacity expansion project of the Shenyang-Haikou Expressway; and innovated a composite horizontal-plus-vertical reconstruction and expansion technology in the Guangzhou-Shenzhen section of the Beijing-Hong Kong-Macao Expressway, expanding it from 6 lanes to 10 to 14 lanes. In September 2025, the Guizhou Nayong-Qinglong Expressway opened to traffic, featuring three world-class bridges along its entire route: the Liuzhi Extra-Large Bridge, the Wumengshan Bridge, and the Zangkejiang Extra-Large Bridge, among which the Wumengshan Bridge won the Eugene C. Figg Jr. Award from the International Bridge Conference (IBC).
In the bridge sector, in November 2025, the Yanji Yangtze River Bridge—the world's first and longest-span four-main-cable double-deck suspension bridge with different sags, designed by the company—was closed. Its upper deck is a two-way 6-lane expressway, and the lower deck is a two-way 4-lane urban expressway. The company also designed the Zhijiang Yangtze River Bridge, the world's longest-span composite girder cable-stayed bridge; the Guanyinsi Yangtze River Bridge, the world's longest-span highway cable-stayed bridge; and the Shiziyang Corridor, a super project in the Guangdong-Hong Kong-Macao Greater Bay Area. The Shuangbao Extra-Large Bridge on the Chongqing-Hunan Expressway double line, the world's longest-span double-span continuous arch bridge, won the Gustav Lindenthal Medal from the International Bridge Conference and was named one of the "Top Ten Most Beautiful Bridges from 2020 to 2025."
In the tunnel sector, for the design of the West Tianshan Tunnel, which has the greatest burial depth, the company adopted a "main tunnel + lateral parallel pilot tunnel" scheme, eliminating traditional shafts and inclined shafts and using the lateral parallel pilot tunnel as a permanent ventilation channel instead. For the world's first large-diameter shield tunnel in submarine karst strata—the Suoyu Bay Submarine Tunnel on Dalian Metro Line 5—it innovatively adopted a buffer-layer double-lining design. The company also designed the first underwater road tunnel project undertaken overseas by a Chinese enterprise—the Karnaphuli River Tunnel in Chittagong, Bangladesh—forming a full-life-cycle design technology for overseas underwater tunnels based on Chinese standards. It also expanded into emerging markets such as Uzbekistan and Iraq, becoming the first Chinese-funded enterprise to obtain dual Class-A consulting qualifications in Peru.
In the fields of urban construction and environmental ecology, the company deeply empowered high-quality urban development. In the development project of the northern area of the Wenzhou Southern Zhejiang Sci-Tech City, it planned projects such as an urban reception hall and a sci-tech innovation industrial park through a government-enterprise cooperation model. In the Xiong'an New Area, it built over 20 municipal road and utility tunnel projects, among which the supporting municipal road project for the Rongxi Area was constructed to high standards with sponge city design concepts; during the heavy rainfall in Xiong'an in 2023, there was virtually no surface water accumulation and no water ingress into the utility tunnels. In the Lungui Road project in Shunde District, Foshan City, it designed China's first two-way 8-lane inland river immersed tube tunnel—the Tanzhou Waterway Immersed Tube Tunnel—innovatively applying foundation reinforcement technologies such as deep-water cement-soil mixing piles.
In terms of ecological governance, the company led projects such as the Wuhan Ziyang Lake "Great Lake+" renovation project, the Fujian Longyan abandoned mine treatment, and the environmental protection sound barrier renovation for the Hankou-Ezhou Expressway. In the "Luerhuanjiang Mangrove Restoration Project" of the Qinzhou Blue Bay Comprehensive Improvement Initiative in Guangxi, it implemented mangrove ecological restoration covering a total area of about 111 hectares, enhancing the coastal zone's ecological functions and disaster prevention and mitigation capabilities.
In the digital field, the company built a cross-road-domain traffic flow state identification and prediction technology system based on "AI Vision + Deep Transfer," developed software such as the engineering survey digital platform (Xing Tianxia) and the JSL—Route Expert System, as well as products like the Highway and Urban Road BIM Cloud Platform, and launched a "Complete Set of Digital and Intelligent Design Technical Solutions for Expressway Reconstruction and Expansion." The main project Phase II of the National Intelligent Connected Vehicle and Smart Transportation Application Demonstration Zone, designed by the company, is the largest intelligent connected vehicle operation demonstration zone in China. The company explicitly proposed and advanced a "three timely" system of "timely perception, timely warning, and timely disposal," and independently developed highway satellite InSAR monitoring technology, a machine vision bridge dynamic deflection monitoring system, and an intelligent inspection and rescue robot equipped with an AI model, which has already been deployed in the Tianshan Shengli Tunnel.
In equipment research and development, the company's technical team successfully developed and iterated China's first kilometer-class small low-carbon horizontal directional drilling rig and testing equipment, which has been applied to projects such as the Tianshan Shengli Tunnel, the West Tianshan Tunnel, and the Duku Expressway. The technical team also successfully developed fatigue intelligent treatment technology and equipment for orthotropic steel bridge decks, pioneering the world's first automated U-rib overhead internal welding technology, which has been promoted to nearly a hundred long-span bridges domestically and internationally. The company conducted research on key technologies for DC lighting and green safety enhancement in highway tunnels, and the related achievements have been successfully applied to 159 tunnel maintenance and renovation projects, achieving energy savings of over 30% compared to traditional tunnel lighting fixtures.
During the "14th Five-Year Plan" period, the company undertook a total of 6 national-level scientific research projects and led over 30 provincial, ministerial, and group-level scientific research topics; it led or participated in the compilation of 5 international standards and 24 national and industry standards, won 177 provincial/ministerial-level and above science and technology awards (including patent awards) and over 320 engineering awards, and newly obtained 303 authorized patents (including 201 invention patents). All 9 of its subsidiaries were recognized as National High-Tech Enterprises, among which 1 is a national-level specialized and sophisticated "Little Giant" enterprise, and 8 are provincial-level specialized and sophisticated "Little Giant" enterprises.
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