2022年1月8日青海门源M_(S)6.9地震序列、地表破裂特征及其工程效应  

The earthquake sequence,surface rupture characteristics and engineering effects of the MS6.9 Qinghai Menyuan earthquake on January 8,2022

作　　者：殷翔[1] 绽蓓蕾[1] 姚生海[1] 余娜[1] 徐玮阳 Yin Xiang;Zhan Beilei;Yao Shenghai;Yu Na;Xu Weiyang(Qinghai Earthquake Agency,Qinghai Xining 810001,China)

机构地区：[1]青海省地震局,青海西宁810001

出　　处：《地震科学进展》2024年第1期57-64,共8页Progress in Earthquake Sciences

基　　金：中国地震局星火计划项目(XH21038Y)资助。

摘　　要：2022年1月8日01时45分,青海省海北藏族自治州门源县发生M_S6.9地震。为深入了解此次地震的活动特征,以地震灾害损失调查为基础,结合无人机低空摄影测量以及余震数据分析等多种手段,对硫磺沟内的地表破裂带及交通系统的震害进行了初步调查分析,此次同震地表破裂以左旋走滑变形为主,伴有一定的逆冲分量,最大左旋位移量为3.1 m。地震还造成兰新高铁硫磺沟大桥、大梁隧道遭受严重破坏,主要表现为主梁侧翻滑移,轨道扭曲变形,隧道内部结构出现错位变形等现象。最后,对该地区今后桥梁的抗震设防措施提出建议。At 01:45 on January 8,2022,an MS6.9 earthquake occurred in Menyuan County,Haibei Tibetan Autonomous Prefecture,Qinghai Province.In order to gain a deeper understanding of the activity characteristics of this earthquake,the author conducted a preliminary investigation and analysis of the surface rupture zone and traffic system damage in the Liuhuanggou based on the investigation of earthquake disaster losses,combined with various methods such as drone low altitude photogrammetry and aftershock data analysis.The fault activity was mainly characterized by left-lateral strike-slip motion,accompanied by a certain thrust component,with a maximum left lateral displacement of 3.1 m.At the same time,the earthquake caused serious damage to the Liuhuanggou bridge and the Daliang tunnel of the Lanxin high-speed railway,mainly manifested as beam overturning and sliding,track distortion and deformation,and internal structure displacement and deformation of the tunnel.Finally,this article provides opinions and suggestions on the seismic fortification measures for bridges in the region.

关 键 词：门源地震 同震地表破裂 左旋走滑 地震灾害 

分 类 号：P315.9[天文地球—地震学]