Land subsidence site investigated by combining active and passive MASW methods: a case study from central Taiwan

IF 2.1 4区 地球科学
Jia-Wei Liu, Young-Fo Chang, Hao Kuo-Chen
{"title":"Land subsidence site investigated by combining active and passive MASW methods: a case study from central Taiwan","authors":"Jia-Wei Liu,&nbsp;Young-Fo Chang,&nbsp;Hao Kuo-Chen","doi":"10.1007/s11600-025-01639-w","DOIUrl":null,"url":null,"abstract":"<div><p>Land subsidence presents significant infrastructure risks in central Taiwan due to the region’s young and weak strata. This study addresses the differential subsidence impacting a railway section by integrating of borehole data, electrical resistivity tomography (ERT) and multi-channel analysis of surface waves (MASW) methods. Limited by spread lengths, traditional ERT and active MASW are confined to shallow subsurface analysis. Our approach enhances depth investigation by combining passive MASW, which captures low-frequency data for deeper geological insights. A 131 m-long active and passive MASW surveys was conducted alongside the railway. The analysis of dispersion curves from both MASW methods showed consistent phase velocities across overlapping frequency ranges, confirming the approach’s reliability. Ambient noise analysis further validated that passive MASW could generate stable dispersion curves within 1 h under various conditions, such as day, night, and during train activities. Geophysical images revealed that the differential subsidence is primarily driven by variations in subsurface material properties. Integrating geophysical and lithological data identified a previously undetected critical soft sand layer at 11–20 m depth as a major subsidence factor. This study not only underscores the effectiveness of passive MASW but also highlights the significant benefits of combining geophysical methods. The integrated interpretation helps to characterize the identification of subsidence cause, a crucial step in improving mitigation strategy for infrastructure risks.</p></div>","PeriodicalId":6988,"journal":{"name":"Acta Geophysica","volume":"73 5","pages":"4339 - 4355"},"PeriodicalIF":2.1000,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Geophysica","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1007/s11600-025-01639-w","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

Land subsidence presents significant infrastructure risks in central Taiwan due to the region’s young and weak strata. This study addresses the differential subsidence impacting a railway section by integrating of borehole data, electrical resistivity tomography (ERT) and multi-channel analysis of surface waves (MASW) methods. Limited by spread lengths, traditional ERT and active MASW are confined to shallow subsurface analysis. Our approach enhances depth investigation by combining passive MASW, which captures low-frequency data for deeper geological insights. A 131 m-long active and passive MASW surveys was conducted alongside the railway. The analysis of dispersion curves from both MASW methods showed consistent phase velocities across overlapping frequency ranges, confirming the approach’s reliability. Ambient noise analysis further validated that passive MASW could generate stable dispersion curves within 1 h under various conditions, such as day, night, and during train activities. Geophysical images revealed that the differential subsidence is primarily driven by variations in subsurface material properties. Integrating geophysical and lithological data identified a previously undetected critical soft sand layer at 11–20 m depth as a major subsidence factor. This study not only underscores the effectiveness of passive MASW but also highlights the significant benefits of combining geophysical methods. The integrated interpretation helps to characterize the identification of subsidence cause, a crucial step in improving mitigation strategy for infrastructure risks.

Abstract Image

Abstract Image

主动式与被动式MASW相结合的地面沉降点研究:以台湾中部地区为例
由于台湾中部地层年轻而脆弱,地面沉降给基础设施带来了重大风险。该研究通过综合钻孔数据、电阻率层析成像(ERT)和多通道表面波分析(MASW)方法,解决了影响铁路剖面的差异沉降问题。由于传播长度的限制,传统的ERT和有源MASW仅限于浅层地下分析。我们的方法通过结合被动式MASW(捕获低频数据以获得更深入的地质信息)来增强深度调查。在铁路沿线进行了长达131米的主动和被动MASW测量。两种方法的色散曲线分析表明,在重叠的频率范围内相速度一致,证实了该方法的可靠性。环境噪声分析进一步验证了被动式MASW在白天、夜间、列车活动期间等各种条件下均能在1 h内产生稳定的色散曲线。地球物理图像显示,差异沉降主要是由地下物质性质的变化驱动的。综合地球物理和岩性数据,确定了11-20 m深度的关键软砂层是主要的下沉因素。本研究不仅强调了被动式MASW的有效性,而且强调了结合地球物理方法的显著优势。综合解释有助于确定沉降原因的特征,这是改进基础设施风险缓解战略的关键一步。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Acta Geophysica
Acta Geophysica GEOCHEMISTRY & GEOPHYSICS-
CiteScore
3.80
自引率
13.00%
发文量
251
期刊介绍: Acta Geophysica is open to all kinds of manuscripts including research and review articles, short communications, comments to published papers, letters to the Editor as well as book reviews. Some of the issues are fully devoted to particular topics; we do encourage proposals for such topical issues. We accept submissions from scientists world-wide, offering high scientific and editorial standard and comprehensive treatment of the discussed topics.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信