Enterprise Network of China Railway 20th Bureau Group Co., Ltd.

In terms of highway construction, since the Shanghai Expressway was built in 1985, it has successively participated in Xilin, Xibao, Xiyan, Yujing, Qing Ji, Qujiang, Hequ, Bimbo, Huning, Xicheng, Xu Lian, Ningjingyan, Sujiahang, Hangzhou-Ningbo, Zhajiasu, Anhui He 'an, Bengbu, Fu Jie and Luohe 'nan. Construction of several expressways such as Danben, and reconstruction projects of national highways such as 107, 108, 205, 206, 2 10, 2 13, 3 10/2. Since 1985, it has independently undertaken the construction of dozens of independent highway bridges, such as Jing 'an in Zhuhai, Xili, Minjiang River in Leshan, Dadu River, Qingqiupu in Suzhou, Qixinghe Bridge in Baoji, TaiDonghe Bridge, and Chengdu Beikou Ring Expressway Viaduct. It has also participated in the Shanghai North-South Viaduct, Nanjing East Main Road Overpass Bridge, Shaoxing Chang 'an, Nanjing Qilin, Huashan Temple, Hanzhong Gate and Wei Yi Road. In terms of highway tunnel construction, Songshan Tunnel in Macau, Longyan Tunnel in Zhangzhou, Huaying Mountain in Chongqing and Baiaoling Tunnel in Ningbo have been built successively. Over the years, the traffic and highway projects completed by the company have completed the tasks with high quality on schedule and created a good social reputation. Among them, Guanduli Overpass independently built by the company won the Luban Award for National Construction Project, Huayingshan Tunnel won the first prize for quality engineering of the Ministry of Railways, the Silver Award for National Quality Engineering, the Zhan Tianyou Civil Engineering Award, Qingqiupu Bridge won the Silver Award for National Construction Quality, and Qixia Bridge, Minjiang Bridge and Jing 'an Bridge were rated as provincial (ministerial) quality projects. Lu Ning Airport Expressway won the Luban Award for Construction Engineering, Shanghai-Nanjing Expressway won the Luban Award for National Construction Engineering, and the North-South Viaduct won the Magnolia Award for Shanghai's highest construction quality award. Long-term highway construction, while bringing up a large number of technical managers and construction professionals for high-grade highway construction, has equipped well-equipped construction machinery and testing instruments for highway tunnels, bridges, subgrade earthwork, road subbase, base course and asphalt and cement concrete surface, and accumulated construction experience of high-grade highways under various complex geological conditions, especially for gas, broken layer and coal seam treatment of long tunnels. He has accumulated rich construction experience in construction technologies such as assembly of long-span arch bridge and tied arch bridge, hanging basket grouting of continuous beam and rigid frame bridge, assembly and erection of super-wide (28m) and overweight (3,200t) precast beam, multi-directional prestress, and treatment of soft soil, collapsible loess, expansive soil, red sandstone, karst and subgrade karst collapse, and won many scientific and technological achievements and construction method awards.