CHENG Yonggang, ZHAO Xiaoyan, LI Guangbai. 2016: DISCUSSION ON THE MAIN TECHNICAL DESIGN OF HIGHWAY SUBGRADE IN TIBET. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 1-10. DOI: 10.13544/j.cnki.jeg.2016.s1.001
    Citation: CHENG Yonggang, ZHAO Xiaoyan, LI Guangbai. 2016: DISCUSSION ON THE MAIN TECHNICAL DESIGN OF HIGHWAY SUBGRADE IN TIBET. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 1-10. DOI: 10.13544/j.cnki.jeg.2016.s1.001

    DISCUSSION ON THE MAIN TECHNICAL DESIGN OF HIGHWAY SUBGRADE IN TIBET

    • Tibet is well known for its high altitude, big elevation, steep terrain and frequent fault activity resulting in many reivers and ecological fragility followed by frequent geological hazards. Adding the widely distributed scenes, it is difficult to build an expressway due to its geological engineering condiditons. So, the design technology for Tibetan expressways should be diffierent from what for the inland expressways. At present, the expressway construction in Tibetan area are basically in the initial stage. How to ensure highway safety, avoid disasters, save economy, protect environment and gain good engineering construction operation is the key problem and the difficulty of Tibetan highway design. In this paper, two typical Tibetan highway are taken as examples to study the main item of expressway subgrade design including general subgrade, high embankment, deep excavation, special Subgrade, earthwork and other contents according to the geological environment in Tibetan area and the humanities. The key issues in design are discussed which should be paid attention to in the design of roadbed. The results may be taken as a good reference and guidance for obtaining high-quality design of the future Tibetan highway.
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