Landslide Science for a Safer Geoenvironment - Vol.1: The International Programme on Landslides (IPL)
Landslide Science for a Safer Geoenvironment - Vol.1: The International Programme on Landslides (IPL)
复制标题
滑坡科学促进更安全的地质环境 - 第 1 卷：国际滑坡计划 (IPL)
DOI：
10.1007/978-3-319-04999-1_32
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Briggs K
中科院分区：
文献类型：
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作者：
Briggs K
许多支持英国交通网络的铁路土方工程的斜坡上都覆盖着树木。树木根部吸水会引起路堤土壤的季节性收缩和膨胀，影响铁路轨道的线路和水平。这需要持续维护，以维持轨道的可用性并减少列车速度限制。然而，从铁路路堤斜坡上砍伐树木以及根系吸水产生的土壤吸力丧失可能会对路堤稳定性产生负面影响，特别是在潮湿天气期间。需要更好地了解树木清除对路堤水文的影响，以便基础设施所有者能够开发植被清除管理系统。提出了来自仪表化铁路路堤的水文现场监测数据，并将其与结合日常天气数据的根部吸水有限元模型进行了比较。研究表明，树木在其根部区域内保持持久的吸力，不受土壤表面季节性湿润和干燥的影响。然而，从路堤斜坡上移除树木会导致土壤表面的土壤变湿，因为根部区域内持久的土壤吸力会消失。
Trees cover the slopes of many railway earthworks supporting the United Kingdom’s transport network. Root water uptake by trees can cause seasonal shrinkage and swelling of the embankment soil, affecting the line and level of the railway track. This requires continual maintenance to maintain the serviceability of the track and reduce train speed restrictions. However, the removal of trees from railway embankment slopes and the loss of soil suctions generated by root water uptake may negatively impact embankment stability, particularly during periods of wet weather. An improved understanding of the influence of tree removal on embankment hydrology is required so that infrastructure owners can develop a managed system of vegetation clearance.Hydrological field monitoring data from an instrumented railway embankment are presented and compared with a finite element model of root water uptake incorporating daily weather data. It is shown that trees maintain persistent suctions within their root zone which are unaffected by seasonal wetting and drying at the soil surface. However, the removal of trees from the embankment slope causes wetting of the soil from the soil surface as persistent soil suctions within the root zone are lost.