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| Application of Comprehensive Survey Technology in Active Fault Investigation of High-speed Railway |
| WANG Ganggang |
| China Railway Design Corporation, Tianjin 300251, China |
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Abstract Research purposes： Active faults have great influence on high-speed railway line selection. Especially, Holocene active faults can cause secondary geological disasters such as sand liquefaction, ground fissures, surface subsidence and surface deformation. Therefore, it's very important to select the correct survey technology to find out the location and activity of active faults for the geological line selection and engineering measures of high-speed railway. Research conclusions：（1）Through data collection, geological survey, UAV surveying and mapping, comprehensive geophysical exploration, geological drilling, trough probe, 14C and opto-luminescence dating, it is found that the Anqiu-Juxian fault in the study area is an active fault in Holocene.（2） The strike-slip activity rate of the east branch of the Anqiu-Juxian fault is 1.49 mm/a, and the crossing mileage with the railway is DK141+780 and DK141+940. The vertical activity rate of the west branch of the Anqiu-Juxian fault since late Pleistocene is 0.16 mm/a, and the crossing mileage with the railway is DK152+275.（3）The high-speed railway should pass through the Anqiu-Juxian fault at a large angle, and the project type should adopt the simple project which is easy to repair.（4）The application of the comprehensive survey technology has achieved good results in the investigation of active fault zone and has certain guiding significance for the geological investigation of high-speed railway crossing active faults.
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