基于九峰井水化学特征分析地铁施工对流体观测的影响  

Influence of Subway Construction on Fluid ObservationBased on Jiufeng Well Hydrochemical Characteristics

作　　者：翁骋 王杰[1,2] 舒德亮 任宏微 李小芬 WENG Cheng;WANG Jie;SHU Deliang;REN Hongwei;LI Xiaofen(Institute of Seismology,CEA,Wuhan 430071,China;Hubei Earthquake Agency,Wuhan 430071,China;National Institute of Natural Hazards,MEM,Beijing 100085,China)

机构地区：[1]中国地震局地震研究所,武汉市430071 [2]湖北省地震局,武汉市430071 [3]应急管理部国家自然灾害防治研究院,北京市100085

出　　处：《大地测量与地球动力学》2023年第7期767-770,共4页Journal of Geodesy and Geodynamics

基　　金：中国地震局“三结合”课题(3JH-202201030)。

摘　　要：通过分析九峰井在武汉地铁19号线施工期间的水位变化特征,结合工程地质、水文地质、岩芯和水化学资料发现,九峰井水质类型与地表水基本一致。由氢氧同位素分析可知,九峰井主要受大气降水补给,与周边地表水联系紧密,表明武汉地铁施工期间大量排水对周边上层滞水、潜水产生较大影响,从而造成九峰井水位下降。最后基于《地震台站观测环境技术要求》分析地铁施工对地下水环境和台站流体观测的影响,给出一些流体台选址方面的新认识。This paper analyses the water level variation characteristics of Jiufeng well during the construction of Wuhan metro line 19.Based on engineering geology,hydrogeology,core and hydrochemical data,we find that the water quality of Jiufeng well is basically the same as that of surface water.Hydrogen and oxygen isotope analysis shows that Jiufeng well is mainly recharged by atmospheric precipitation and is closely related to surrounding surface water.It can be proven that large amount of drainage during the construction of Wuhan metro has a great influence on the stagnant water and phreatic water of the surrounding upper layer,thus causing the decline of water level of Jiufeng well.Based on the technical requirement for the observational environment of seismic stations,we analyze the influence of subway construction on groundwater environment and station fluid observation,and give some new understandings about fluid station selection.

关 键 词：地下流体 水化学 地铁施工 地质构造 

分 类 号：P315[天文地球—地震学]