四川北川新县城地震地质灾害研究
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摘要
汶川地震给北川老县城造成了毁灭性的破坏。北川新县城选址与建设中地震地质灾害研究是其中一项重要内容。本文通过对汶川地震中北川老县城所遭受的地震地质灾害及北川新县城地质条件的分析,在地质考察、地质钻探、断层探测等基础上,对北川新县城地震地质灾害进行了研究,认为北川新县城不会发生断裂地表破裂、砂土液化等灾害;在新县城南部可能发生局部崩塌;新县城南东侧河流侵蚀堆积阶地局部可能发生轻微滑坡灾害。建议在规划和建设中对上述灾害引起注意,进行必要的防治。
The ruinous destruction of Beichuan county was caused by Wenchuan earthquake.The research of seismogeological disasters is one of the important contents in the location and construction.In this paper,the seismogeological disasters were analyzed to new Beichuan county town on the basis of the geological survey,geological drilling and fault detection.According to analyzing the seismogeological disasters caused by Wenchuan earthquake and the geological conditions in Beichuan county,the studies proved that it wouldn't have tectonic ground crack and sand-soil liquefaction site in the new town.In the south of the new town,local collapse and slight landslide could occur on the river terrace.The necessary measures to geologic calamity prevention and control should be taken during planning and construction.
The ruinous destruction of Beichuan county was caused by Wenchuan earthquake.The research of seismogeological disasters is one of the important contents in the location and construction.In this paper,the seismogeological disasters were analyzed to new Beichuan county town on the basis of the geological survey,geological drilling and fault detection.According to analyzing the seismogeological disasters caused by Wenchuan earthquake and the geological conditions in Beichuan county,the studies proved that it wouldn't have tectonic ground crack and sand-soil liquefaction site in the new town.In the south of the new town,local collapse and slight landslide could occur on the river terrace.The necessary measures to geologic calamity prevention and control should be taken during planning and construction.
引文
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[2]MaYinsheng,LongChangxing,TanChengxuan.Co-seis-micfanlts and geological hazards and incidence of active fanlt ofWenchuan Ms8.0 Earthquake,Sichuan,China[J].Actageologica sinica,Vol.83 No.4:713-723.
[3]姜纪沂,宋洋,谷洪彪.汶川Ms8.0地震地质灾害发育特征及诱发因素分析[J].防灾科技学院学报,2009,4(1):43-47.
[4]徐锡伟,闻学泽,叶建青.四川汶川Ms8.0地震地表破裂及其发震构造[J].地震地质,2008,30(3):597-629.
[5]殷跃平.汶川八级地震地质灾害研究[J].工程地质学报,2008,16(4):433-444.
[6]中国建筑科学研究院.建筑抗震设计规范(GB5001-2001)[S].北京:中国建筑工业出版社,2002:17.
[7]晁洪太.第四纪地层中活断层的显微构造标志、隐性活断层及其应用研究[D].博士学位论文,1998.
[8]黄丽珍,李家春,万利.公路崩塌灾害等级划分初步研究[J].中国地质灾害与防治学报,2009,20(3):44-46.
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