地质力学学报2025，Vol.31Issue(2)：301-312,12.DOI:10.12090/j.issn.1006-6616.2024093
青藏高原错那-沃卡断裂带活动性与地质安全风险防控对策研究
Study on the activity of the Cuona-Woka Fault Zone,Qinghai-Tibet Plateau,and geological safety risks and prevention methods
摘要
Abstract
[Objective]The Plateau Railway,constructed along the Yarlung Zangbo suture zone on the Qinghai-Tibet Plateau,crosses the active Cuona-Woka Fault Zone.Coseismic surface rupture caused by the active fault leads to engineering breaks,tunnel deformation,and geological disasters;it poses a significant geological safety risk during railway operation.[Methods]Based on remote sensing,field investigation,and published research,this paper analyzes the development characteristics,activity,and impact of the Cuona-Woka Fault Zone on the Plateau Railway that it intersects.[Results]The study shows that the Cuona-Woka Fault Zone consists of five northeast-trending branch faults.The western boundary faults of the Woka Basin(F2-1,F2-2)show Late Pleistocene activity,the eastern boundary faults of the Woka Basin(F2-4,F2-5)have Holocene activity,and the F2-3 fault within the basin is the seismogenic fault of the 1915 MS 7.0 Sangri earthquake.Based on the deformation signs caused by fault activity and the types of active faults,it is estimated that future coseismic surface ruptures of the branch faults of the Cuona-Woka Fault Zone may cause deformation and damage to the Zangga tunnel and the Sangzhuling tunnel,which cross the fault zone,with an impact width of approximately 16～30 m.[Conclusion]Therefore,it is recommended to strengthen research on geological safety risk prevention measures for strong seismic deformation and engineering breaks in the sections of the Plateau Railway crossing the active fault zone.[Significance]The results of the study provide guidance for safe operation and disaster prevention and mitigation of the Plateau Railway,as well as a reference for the impact assessment of active fault engineering on other railway lines.关键词
高原铁路/错那-沃卡/活动断裂/地质安全/工程错断/风险防控Key words
Plateau Railway/Cuona-Woka/active faults/geological safety/engineering breaks/risk prevention and control分类
地质学引用本文复制引用
强新刚,郭长宝,孙东霞,韩建恩,张广泽,张敏,邱振东,何平..青藏高原错那-沃卡断裂带活动性与地质安全风险防控对策研究[J].地质力学学报,2025,31(2):301-312,12.基金项目
中国地质调查局地质调查项目(DD20221816) （DD20221816）
国家自然科学基金项目(42372339) （42372339）
中国地质科学院基本科研业务费专项(JKYZD202410)This research is financially supported by the China Geological Survey Project(Grant No.DD20221816),the National Natural Science Foundation of China(Grant No.42372339),and the Chinese Academy of Geological Sciences Basal Research Fund(Grant No.JKYZD202410). （JKYZD202410）
