4D electrical resistivity tomography for assessing the influence of vegetation and subsurface moisture on railway cutting condition
4D electrical resistivity tomography for assessing the influence of vegetation and subsurface moisture on railway cutting condition
复制标题
4D 电阻率断层扫描用于评估植被和地下湿度对铁路切割条件的影响
DOI：
10.1016/j.enggeo.2022.106790
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发表时间：
2022
影响因子：
7.4
通讯作者：
S. Donohue
中科院分区：
文献类型：
--
作者：
J. Holmes;J. Chambers;P. Wilkinson;B. Dashwood;D. Gunn;M. Cimpoiasu;M. Kirkham;S. Uhlemann;P. Meldrum;O. Kuras;David Huntley;S. Abbott;V. Sivakumar;S. Donohue
铁路网络上的边坡、路基和路堑的不稳定性在全球范围内越来越普遍。监测脆弱的基础设施有助于岩土资产管理，并提高运输安全和效率。在这里，我们研究使用一种新的，近实时的电阻率断层扫描（ERT）监测系统，以评估在英国莱斯特郡的铁路切割的稳定性。2015年，在一个残留滑坡（草地）和两侧较稳定的地面（树木）上安装了ERT监测系统，以监测电阻率随时间和空间的变化，并评估不同类型植被对交通基础设施稳定性的影响。两年的四维ERT监测结果在这里，和岩石物理关系在实验室开发的电阻率模型进行校准，以提供一个深入了解水文地质路径内的铁路切割。植被类型对地下水分路径和边坡稳定性的影响也进行了评估-在这里，我们发现，水分含量和土壤吸力的季节性地下变化加剧了树木（林地）的存在。这导致了构成铁路路堑的粘土的收缩-膨胀行为，导致裂缝和剪切强度降低，从而导致不稳定。因此，建议在由膨胀土组成的斜坡上，植草斜坡有利于稳定性。从本研究中获得的使用4-D ERT监测铁路基础设施的见解可应用于其他地方的关键岩土工程资产的监测。
Instability of slopes, embankments, and cuttings on the railway network is increasingly prevalent globally. Monitoring vulnerable infrastructure aids in geotechnical asset management, and improvements to transport safety and efficiency. Here, we examine the use of a novel, near-real-time Electrical Resistivity Tomography (ERT) monitoring system for assessing the stability of a railway cutting in Leicestershire, United Kingdom. In 2015, an ERT monitoring system was installed across a relict landslide (grassed) and an area of more stable ground on either side (wooded), to monitor changes in electrical resistivity through time and space, and to assess the influence of different types of vegetation on the stability of transportation infrastructure. Two years of 4-Dimensional ERT monitoring results are presented here, and petrophysical relationships developed in the laboratory are applied to calibrate the resistivity models in order to provide an insight into hydrogeological pathways within a railway cutting. The influence of vegetation type on subsurface moisture pathways and on slope stability is also assessed – here we find that seasonal subsurface changes in moisture content and soil suction are exacerbated by the presence of trees (wooded area). This results in shrink-swell behaviour of the clays comprising the railway cutting, resulting in fissuring and a reduction in shear strength, leading to instability. As such, it is proposed that on slopes comprised of expansive soils, grassed slopes are beneficial for stability. Insights into the use of 4-D ERT for monitoring railway infrastructure gained from this study may be applied to the monitoring of critical geotechnical assets elsewhere.
影响因子：
3.9
作者：
S. Uhlemann;Alister Smith;J. Chambers;N. Dixon;T. Dijkstra;E. Haslam;P. Meldrum;A. Merritt;D. Gunn;J. Mackay
通讯作者：
S. Uhlemann;Alister Smith;J. Chambers;N. Dixon;T. Dijkstra;E. Haslam;P. Meldrum;A. Merritt;D. Gunn;J. Mackay
DOI：
10.1144/qjegh2016-080
发表时间：
2017-07
影响因子：
1.4
作者：
J. Smethurst;Alister Smith;S. Uhlemann;Chris Wooff;J. Chambers;P. Hughes;S. Lenart;H. Saroglou;S. Springman;H. Löfroth;D. Hughes
通讯作者：
J. Smethurst;Alister Smith;S. Uhlemann;Chris Wooff;J. Chambers;P. Hughes;S. Lenart;H. Saroglou;S. Springman;H. Löfroth;D. Hughes
DOI：
10.1680/jfoen.16.00022
发表时间：
2016-10
期刊：
--
影响因子：
--
作者：
D. Gunn;B. Dashwood;P. Bergamo;S. Donohue
通讯作者：
D. Gunn;B. Dashwood;P. Bergamo;S. Donohue