某大堤空洞位置与弹性波中纵横波关系的数值模拟研究
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摘要
以某大堤堤身空洞检测为工程背景,基于Flac3D方法,对有空洞的堤身模型堤身空洞位置与弹性波中的纵波与横波的传播关系进行计算分析.结果表明:可以通过横波的传播引起大堤表层质点振动发生延迟的水平坐标范围,判断出堤身空洞的水平位置范围;通过纵波的传播引起大堤表层质点振动发生延迟的水平坐标范围,判断出堤身空洞的深度位置范围.研究结果可为采用地震波法进行大堤空洞缺陷位置检测过程中堤身空洞缺陷位置的初步判断提供参考.
In this paper,under the engineering background of levee hollow detection,based on Flac3D method,the relationship between holes position in some levees with holes and primary wave and secondary wave are analyzed.The analytical results show that through the horizontal coordinates' range of vibration delay at surface particle due to the secondary wave propagation in the holes,the horizontal position of holes in levee will be determined;by means of the horizontal coordinates' range of vibration delay at surface particle due to the primary wave propagation in the holes,the vertical position of holes in levee will be determined.The research results will give references to position detection of holes in levees by seismic wave.
In this paper,under the engineering background of levee hollow detection,based on Flac3D method,the relationship between holes position in some levees with holes and primary wave and secondary wave are analyzed.The analytical results show that through the horizontal coordinates' range of vibration delay at surface particle due to the secondary wave propagation in the holes,the horizontal position of holes in levee will be determined;by means of the horizontal coordinates' range of vibration delay at surface particle due to the primary wave propagation in the holes,the vertical position of holes in levee will be determined.The research results will give references to position detection of holes in levees by seismic wave.
引文
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[3]郭玉松,毋光荣,袁江华.堤防隐患探测技术综述[J].水利技术监督,2002(5):40-42.
[4]葛双成,章晓桦,刘超英,等.堤坝隐患物理探测方法及其应用[J].浙江水利科技,2005(5):36-39.
[5]宇津德治,陈铁成,全营道.地震学[M].北京:地震出版社,1981.
[6]陈育民,徐鼎平.FLAC/Flac3D基础与工程实例[M].北京:中国水利水电出版社,2009.
[7]蒋伟.浅层地震勘探中有限元数值模拟方法的应用研究[D].北京:中国地震局地球物理研究所,2011.
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