Slope Stability Assessment of a Major Trunk Road at Scrabster Harbour, Scotland, UK

IF 1.3 4区 工程技术 Q3 ENGINEERING, GEOLOGICAL
M. C. Katchkin, J. Thomson, R. Mcconnell, R. Fitzgerald, R. Moore
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引用次数: 0

Abstract

In 2017 two landslides resulted in temporary closure of the main access road to Scrabster Harbour, located in the north of the Scottish mainland. A slope stability assessment was commissioned to investigate the occurrence, causes and mechanisms of historical landslides and their associated consequences to inform future landslide hazard potential. Within Scotland, most slope stability studies are undertaken using qualitative rather than quantitative methods, largely due to insufficient historical data. This paper presents a case study where a semi-quantitative risk assessment was used to assess the stability of coastal slopes above the A9 Trunk Road at Scrabster Harbour. A database of historical landslides and slope characteristics was compiled and used in a semi-quantitative risk assessment to provide the client with targeted information on which areas of the slope can be stabilised most effectively. This was based on ranking the slopes in terms of relative risk, thus providing the road operator and maintenance contractor with an indication of those slopes presenting a higher risk so that these areas could be prioritised for remedial works. The analysis showed that surface water drainage intersecting the slopes and locally over-steepened slopes were primary controls for the observed landslides.
英国苏格兰斯克拉布斯特港一条主要干道的边坡稳定性评估
2017年,两次山体滑坡导致通往苏格兰大陆北部斯克拉布斯特港的主要通道暂时关闭。委托进行了边坡稳定性评估,以调查历史滑坡的发生、原因和机制及其相关后果,为未来滑坡的潜在危险提供信息。在苏格兰,大多数边坡稳定性研究都是使用定性而非定量方法进行的,这主要是由于历史数据不足。本文介绍了一个案例研究,其中使用半定量风险评估来评估斯克拉布斯特港A9主干道上方海岸斜坡的稳定性。编制了一个历史滑坡和边坡特征数据库,并在半定量风险评估中使用,为客户提供关于哪些边坡区域可以最有效地稳定的有针对性的信息。这是基于根据相对风险对斜坡进行排名,从而向道路运营商和维护承包商提供风险较高的斜坡的指示,以便优先对这些区域进行补救工程。分析表明,与斜坡相交的地表水排水和局部超陡斜坡是观测到的滑坡的主要控制因素。
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来源期刊
CiteScore
3.40
自引率
14.30%
发文量
66
审稿时长
6 months
期刊介绍: Quarterly Journal of Engineering Geology and Hydrogeology is owned by the Geological Society of London and published by the Geological Society Publishing House. Quarterly Journal of Engineering Geology & Hydrogeology (QJEGH) is an established peer reviewed international journal featuring papers on geology as applied to civil engineering mining practice and water resources. Papers are invited from, and about, all areas of the world on engineering geology and hydrogeology topics. This includes but is not limited to: applied geophysics, engineering geomorphology, environmental geology, hydrogeology, groundwater quality, ground source heat, contaminated land, waste management, land use planning, geotechnics, rock mechanics, geomaterials and geological hazards. The journal publishes the prestigious Glossop and Ineson lectures, research papers, case studies, review articles, technical notes, photographic features, thematic sets, discussion papers, editorial opinion and book reviews.
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