摘要
研究发现坡面水土流失与坡面水流和土体有关,对路堤坡面水流运动和土体受力进行分析,推导出一种路堤坡面土体水土流失计算方法。在降雨、细沟侵蚀临界条件、路堤填料基本物理力学参数和路堤设计基础上,该方法可对路堤水土流失临界坡长和水土流失模数进行估算。通过4种不同地质环境下的铁路路堤试验调查结果,对该方法进行验证。计算结果与试验结果吻合较好,为交通建设工程施工期预算水土流失量和防护设计提供了一种有效方法。
With analysis of overland flow and soil stress in embankment, a calculation method for soil and water loss of embankment slope is put forward. The critical slope length and the amount of water and soil loss can be estimated with given rainfall, critical condition of rill erosion, physical and mechanical properties of fill and the design specifications. The railway embankment test and investigation data under four different geological conditions are employed to validate the method, and good agreement between theory and test proves the method may serve as an effective method for soil erosion prediction and prevention design.
出处
《土木工程学报》
EI
CSCD
北大核心
2009年第4期128-132,共5页
China Civil Engineering Journal
基金
铁道部科技司项目(2005Z005)
关键词
路堤
边坡
水土流失
计算方法
embankment
slope
soil erosion
calculation method
