| 青海门源M6.9地震典型隧道破坏特征分析与启示 |
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| 引用本文： | 张威,李明,姬云平,李国良,赵录学,李守刚.青海门源M6.9地震典型隧道破坏特征分析与启示[J].西北地震学报,2022,44(3):661-669. |
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| 作者姓名： | 张威 李明 姬云平 李国良 赵录学 李守刚 |
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| 作者单位： | 中铁第一勘察设计院集团有限公司 |
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| 基金项目： | 甘肃省自然科学基金(18JR3RA014)； |
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| 摘 要： | 地震引起的断层强烈错断是造成隧道等地下结构严重破坏的重要原因。以2022年青海门源6.9级地震中左旋走滑逆断层错动造成的隧道震害为调查基础，对左旋走滑逆断层错动下的震害特征及震害成因进行研究分析，主要得到如下结论：(1)左旋走滑逆断层造成大梁隧道线位严重错动，水平最大偏移约1.78 m,竖向最大抬升约0.68 m;(2)震害主要集中在断层影响范围内，其中隧道受破坏严重段约350 m,占隧道全长的5.33%,受破坏较严重段分别位于严重段大里程侧402 m和小里程侧646 m范围内，占隧道全长的15.96%,其余段落震害总体轻微；(3)施工缝、仰拱填充层等部位对强震较为敏感，震害表现突出。此次研究通过对震害特征分析得到的有益启示可为同类工程抗震设计提供参考与指导。
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| 关 键 词： | 高铁隧道 门源地震 左旋走滑逆断层 震害特征 调查 |
| 收稿时间： | 2022/3/4 0:00:00 |
Analysis and enlightenment of typical failure characteristics of tunnelscaused by the Menyuan M6.9 earthquake in Qinghai Province |
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| ZHANG Wei,LI Ming,JI Yunping,LI Guoliang,ZHAO Luxue,LI Shougang.Analysis and enlightenment of typical failure characteristics of tunnelscaused by the Menyuan M6.9 earthquake in Qinghai Province[J].Northwestern Seismological Journal,2022,44(3):661-669. |
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| Authors: | ZHANG Wei LI Ming JI Yunping LI Guoliang ZHAO Luxue LI Shougang |
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| Institution: | China Railway First Survey and Design Institute Group Co.,Ltd.,Lanzhou 730000 ,Gansu,China |
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| Abstract: | The strong fault dislocation caused by earthquake is an important reason for the serious damage on underground structures such as tunnels. Based on the investigation of seismic damage on tunnels caused by the dislocation of left-lateral strike-slip reverse fault during the Menyuan M6.9 earthquake in Qinghai Province, this paper studied the characteristics and causes of the seismic damage, and mainly obtained the following conclusions: (1) The left-lateral strike-slip reverse fault causes serious dislocation of Daliang tunnel, with the maximum horizontal offset of about 1.78 m and the maximum vertical uplift of about 0.68 m. (2) The earthquake damages are mainly concentrated within the influence range of the fault. The severely damaged section of the tunnel is about 350 m, accounting for 5.33% of the total length of tunnel; the less seriously damaged section is located within 402 m at the large mileage side and 646 m at the small mileage side, accounting for 15.96% of the total length of tunnel; the earthquake damage in other sections is generally slight. (3) Construction joints and invert filling layers are more sensitive to strong earthquakes, whose seismic damage is prominent. The beneficial enlightenment obtained from the analysis of seismic damage characteristics in this study can provide reference and guidance for the seismic design of similar projects. |
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