芜湖长江大桥桥位地壳活动及地震危险性评价
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摘要
在芜湖长江大桥场地地震安全评价工作中，通过构造地貌，主要断裂活动性和断错物质微观运动特性标志等方面系统研究，结合地震活动时空特征分析，对该大桥及邻区地壳活动性进行了综合评价。研究结果表明，中生代一新生代早期，研究区地壳活动强烈，新生代晚期以来活动强度明显减弱，以块体之间差异升降为其主要活动特性，地壳能量是以小震方式断续释放，桥位所在地属相对稳定地段，适宜于构建芜湖长江大桥这一特大型工程，该研究为弱震区活动习性和地震危险性评价提供了一范例。
During seismic safty evaluation of Wuhu Changjiang Bridge,by means 0f studying totectonic landf0rm,main faults activity,micr0sc0pic sliding behaviour of fault materials andtime-space character of seismic activity, the authors have evaluated synthetically tocrustal active behaviour in Wuhu Changjiang Bridge and its neighboring areas Mz-EarlyKzsince Late-Kz, and f0und the crustal main active character is abviously weaker,sl0wchanges and up-d0wn the crustal main active character,the crustal energies are releasedslowly as small-earthquakes. The place located the bridge is relative stable area,which isfit to build the large bridge. It is put f0rword 'an example for researching to crustal activityand seismic hazard in weak seismic area.
During seismic safty evaluation of Wuhu Changjiang Bridge,by means 0f studying totectonic landf0rm,main faults activity,micr0sc0pic sliding behaviour of fault materials andtime-space character of seismic activity, the authors have evaluated synthetically tocrustal active behaviour in Wuhu Changjiang Bridge and its neighboring areas Mz-EarlyKzsince Late-Kz, and f0und the crustal main active character is abviously weaker,sl0wchanges and up-d0wn the crustal main active character,the crustal energies are releasedslowly as small-earthquakes. The place located the bridge is relative stable area,which isfit to build the large bridge. It is put f0rword 'an example for researching to crustal activityand seismic hazard in weak seismic area.
引文
1Sibson R.H. Earthquake and Rock Deformation InCrustal Fault Zone.Am.Rev.Earth planet,1986,(11):149～175
2杨主恩,张流,石桂梅.粘滑和德滑条件下石英岩的某些显微形貌特征及其地震地质意义.地震地质,1986,8(2):21～25
3姚大全,汤有标,李杰,刘加灿.活动断裂带上粘滑和蠕滑标志及其研究意义.地球物理学进展,1993,8(4):140～148
4姚大全,汤有标.活断层断错产物定向微观古地震标志的研究.中国活动断层研究.北京:地震出版社,1994.170
5姚大全,汤有标等.活动断裂滑移特性标志的研究及存在.基础科学研究新进展.北京:中国科技出版社,1995.
6Yao Daquan et al. Microscopic Indicators ofstlck-slip and creep-slip Indeformatlon products fromthe Daqingshan pledmont active fault. Earthquake Research in China, 1996, 10(1)
2杨主恩,张流,石桂梅.粘滑和德滑条件下石英岩的某些显微形貌特征及其地震地质意义.地震地质,1986,8(2):21～25
3姚大全,汤有标,李杰,刘加灿.活动断裂带上粘滑和蠕滑标志及其研究意义.地球物理学进展,1993,8(4):140～148
4姚大全,汤有标.活断层断错产物定向微观古地震标志的研究.中国活动断层研究.北京:地震出版社,1994.170
5姚大全,汤有标等.活动断裂滑移特性标志的研究及存在.基础科学研究新进展.北京:中国科技出版社,1995.
6Yao Daquan et al. Microscopic Indicators ofstlck-slip and creep-slip Indeformatlon products fromthe Daqingshan pledmont active fault. Earthquake Research in China, 1996, 10(1)
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