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| Analysis and Prevention of Adverse Geological Body in High Seismic Intensity Area of Tibetan Highway |
| CHENG Yong - gang1，LI Guang - bai1，CHEN Yong - xiang2 |
| (1. Sichuan Highway Engineering Consult Supervision Company，Chengdu，Sichuan 610041，China; 2. Sichuan Road ； Bridge ( Group) Co. Ltd，Chengdu，Sichuan 610041，China) |
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Abstract Abstract ： Research purposes ： The regional geological condition of Tibetan region in West Sichuan is extremely complex，and the construction is very dificult. Since the construction of tlie project began，adverse geological body of the high intensity seismic area and the differences in the concept of prevention and control have resulted in a considerable size of the project change，and even caused the project abandonment and the duration delay. Based on this，this paper takes the Maoniugou adverse geological body of Yaan - Kangding highway for exemple，discusses the unfavorable geologic bodies qualitative and project management plan of Til^etan high intensity seismic region，to provide a reference for the future safety and economy construction of the Tibetan highway or Sichuan - Tibet railway. Research conclusions ：( 1 ) The qualitative assessment of adverse geological body in high intensity eartliquake zone should be inferred and verified from slope landform evolution，geological structure，geological analogy and otlier asjDects. (2) The slope stability of high intensity eartiiquake zone should be evaluated according to the geological conditions earthquake history and visits to local residents. (3) The potential sliding force of large adverse geological body in high intensity seismic region is quite sensitive to the safety factor，should reasonably select tiie safety coefficient according to the principle of no damage under small earthquake，repairable under moderate earthquake and no collapse under strong earthquake. (4) The proper clearing and effective drainage of large bad geological body project in the high intensity earthquake zone is the priority measures of slope governance. (5) The research results can provide useful reference for the traffic engineering construction of Tibetan area with high seismic intensity.
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Received: 24 May 2016
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2016, Vol. 33 
