Abstract Research purposes : Chengdu to Kangding of Sichuan - Tibet Railway is located in the western section of Chinese famous Y shaped tectonic wedge position. Regional structure is complex, and the neotectonics is active. There are three Holocene active faults in this area, such as Longmenshan fault,Xianshuihe fault and Yunongxi fault, which have significant impact to railway route selection. By research on the characteristic of the three active faults in the region works with sticky slip dislocation,creep slip deformation,thermal damage,and the secondary geological disasters caused by strong earthquakes,this paper discussed on the principle of geological selection in complex areas of this kind of geological conditions,to reduce the damage to railway projects.
Research conclusions :(1) The three faults of Chengdu to Kangding of Sichuan - Tibet Railway where the strong earthquake occurred,have fault activity and have a greater influence on the railway line selection, to reduce risk by reasonable line selection. (2) The project effect caused by active faults has engineering damage caused by The surface rupture,vibration damage caused by seismic waves,increased difficulties of engineering construction or engineering plan not workable caused by geothermal anomaly in fracture controlled area,the secondary disasters such as landslide,debris flow,collapse damage to engineering formed because of faulting. (3)The geological route selection in active faults area should give full consideration to the activities of the active faults and the main engineering problems caused by it. (4) The research results are mainly applied to the geological route selection work of Chengdu to Kangding in Sichuan - Tibet railway.
WANG Dong,ZHANG Guang-ze,JIANG Liang-wen, et al. Engineering Effect of Active Fault and Geological Alignment of Chengdu to Kangding in Sichuan - Tibet Railway[J]. Journal of Railway Engineering Society, 2015, 32(10): 6-11.