断裂两盘井水位同震响应特征对比分析——以北京八宝山断裂带中段大灰厂两观测井为例

doi:10.13278/j.cnki.jjuese.201606205

吉林大学学报(地球科学版) ›› 2016, Vol. 46 ›› Issue (6): 1815-1822.doi: 10.13278/j.cnki.jjuese.201606205

断裂两盘井水位同震响应特征对比分析——以北京八宝山断裂带中段大灰厂两观测井为例

宋洋^1,2, 谷洪彪¹, 李海君^1,2, 迟宝明^1,2

1. 防灾科技学院地震科学系, 河北三河 065201;
2. 中国地震局工程力学研究所, 哈尔滨 150080

收稿日期:2016-03-02 出版日期:2016-11-26 发布日期:2016-11-26
通讯作者: 谷洪彪(1984),男,副教授,博士,主要从事地震地下水流体研究,E-mail:Hongbiaosw@126.com E-mail:Hongbiaosw@126.com
作者简介:宋洋(1982),女,博士研究生,主要从事地下水位同震响应研究,E-mail:songy0433@126.com
基金资助:
国家自然科学基金项目（41302198）；河北省教育厅高等学校科学研究计划项目（QN20132004）；中国地震局地震科技星火计划项目（XH16059）

Comparison Analysis of Co-Seismic Response Characteristics of Groundwater Level at Two Sides of Fault: A Case Study of Dahuichang Observation Wells in the Middle of Babaoshan Fault in Beijing

Song Yang^1,2, Gu Hongbiao¹, Li Haijun^1,2, Chi Baoming^1,2

1. Department of Earthquake Science, Institute of Disaster Prevention, Sanhe 065201, Hebei, China;
2. Institute of Engineering Mechanics of China Earthquake Administration, Harbin 150080, China

Received:2016-03-02 Online:2016-11-26 Published:2016-11-26
Supported by:
Supported by National Natural Science Foundation of China(41302198), Science Research Project of Hebei Provincial Department of Education(QN20132004) and Earthquake and Technology Spark Program of China Earthquake Administration(XH16059)

摘要/Abstract

摘要： 地震常引起分布于断层两盘观测井的水位同震响应动态变化特征不同。而研究断裂两盘观测井同震响应能力、水位变化特征的差异性及其控制因素，有助于揭示断裂带的渗透性演化过程、可深化地下水位对地震响应机理的认识，对于指导地震观测井网布局具有重要意义。本文尝试从北京八宝山断裂带中段（大灰厂）上下两盘井的水位同震响应次数、形态、幅度、记震能力等方面进行对比分析，通过去除趋势项，采用数字滤波求取井孔气压系数，采用Baytap-G程序求取潮汐参数，并反演出7次大地震对大灰厂区两口井所在含水层产生的体应变量，进而判别两盘震前震后渗透性的变化。结果显示，两口井同震响应特征具有明显差异，上盘井对大震的同震响应次数较多、能力较强；这不仅与断裂带起屏蔽作用有关，而且与井所处含水层渗透性呈不同规律变化密切相关。

关键词: 八宝山断裂, 井水位, 跨断层, 同震响应

Abstract: Earthquake often causes different co-seismic response of groundwater level in observation wells at two sides of the fault. The research on the difference of co-seismic response ability, groundwater level variation at different sides of the fault and its governing factors is helpful to reveal evolution process of fault zone permeability, to deepen understanding the response mechanism of groundwater level to earthquake, and to guide the layout of earthquake observation networks. This paper has made a try to analyze the times, form, amplitude and shock ability of co-seismic response of groundwater level to earthquake in the observation wells in upper and lower side of the middle section of Babaoshan fault zone in Beijing. The borehole pressure coefficient has been calculated with digital filter by trend removing and the tidal parameters have been calculated using Baytap-G program. The volumetric strain of the two aquifers where the observation well is located has also been inverted for the last 7 earthquakes and the permeability variation before and after the earthquake can thereby be discriminated. The results show that the co-seismic response of groundwater level to earthquake in these two observation wells is different and the co-seismic response times of groundwater level in upper side of the fault zone in Beijing has more times and stronger ability than that in lower side, which is in relation to fault belt shielding effect and the different variation of aquifer permeability where the observation well is located.

Key words: Babaoshan fault, well water level, cross-fault, co-seismic response

中图分类号:

P641.7

宋洋, 谷洪彪, 李海君, 迟宝明. 断裂两盘井水位同震响应特征对比分析——以北京八宝山断裂带中段大灰厂两观测井为例[J]. 吉林大学学报(地球科学版), 2016, 46(6): 1815-1822.

Song Yang, Gu Hongbiao, Li Haijun, Chi Baoming. Comparison Analysis of Co-Seismic Response Characteristics of Groundwater Level at Two Sides of Fault: A Case Study of Dahuichang Observation Wells in the Middle of Babaoshan Fault in Beijing[J]. Journal of Jilin University(Earth Science Edition), 2016, 46(6): 1815-1822.

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断裂两盘井水位同震响应特征对比分析——以北京八宝山断裂带中段大灰厂两观测井为例

Comparison Analysis of Co-Seismic Response Characteristics of Groundwater Level at Two Sides of Fault: A Case Study of Dahuichang Observation Wells in the Middle of Babaoshan Fault in Beijing

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