首页 | 本学科首页   官方微博 | 高级检索  
     检索      

长沙井动水位对台湾集集7.6级地震的震时效应及其机理分析
引用本文:敬少群,王佳卫.长沙井动水位对台湾集集7.6级地震的震时效应及其机理分析[J].华南地震,2001,21(1):32-37.
作者姓名:敬少群  王佳卫
作者单位:长沙市地震局,
摘    要:1999年9月21日台湾发生7.6级地震群,震时长沙井水位记录到了水震波和水位阶图象,本文分析了水城波及水位阶产生的机理,认为,震时地城 力波作用于含水层,使含以的流体压力及有效应力发生变化,周期作用的应力波是井口水位产生震荡变化的原因,而有效应力变化岩石骨架胀缩及岩石颗粒重排,岩石骨架胀缩的不可逆塑性变莆部分和岩石颗粒重排是造成震时水位阶的原因,其中,岩石骨架压缩缃起的水位阶在震后可以部分缓慢恢复。

关 键 词:水位变化  水震波  水位阶  台湾地震  应力波  地震前兆  含水层  地下水
文章编号:1001-8662(2001)01-0032-06
修稿时间:2000年8月7日

Analysis on seismic effect and its mechanism of Changsha well's dynamic ground water level for the MS7.6 Jiji earthquake,Taiwan
JING Shao-qun,WANG Jia-wei.Analysis on seismic effect and its mechanism of Changsha well''s dynamic ground water level for the MS7.6 Jiji earthquake,Taiwan[J].South China Journal of Seismology,2001,21(1):32-37.
Authors:JING Shao-qun  WANG Jia-wei
Abstract:While the M S7 6 Jiji earthquake swam on Sept.21,1999 was occurring,the ground water level vibration and leap was recorded by the water level instrument at Changsha well.Based on the power balance principle of well-aquifer system,the mechanism of the water level vibration and leap has been analysed in this paper.The results show that the seismic stress wave acted on the aquifers lead to a change of the fluid pressure and effective stress;periodic acting stress wave resulted in water level vibration.The change of the effective pressure make the rock in bed of the aquifer dilatation and compression,also lead to the grains of rock re-arrangement.Those irreversible and plastic deformation in the course of the dilatation-compression and rock's grains re-arrangement made the water level leap. Among them,the water level leap resulted from the plastic deformation can partly recover after earthquake.
Keywords:water level change  water level vibration  water level leap  Taiwan earthquake
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号