铁路工程大型弃土场水蚀特征天然降雨试验研究--以北同蒲增建二线原平至太原段河庄弃土场为例

以北同蒲增建二线改造工程河庄弃土场作为研究对象,在雨季进行了天然降雨试验研究,确定了项目建设产生的弃土场区域内产流过程及影响因素和土壤侵蚀特征。弃土场区域内产流受到降雨特征和水保措施功能发挥的影响。弃土场坡面地表土壤特性随着降雨击溅和径流冲刷的作用而发生变化,从而影响区域内径流和渗流途经,造成坡面产流的不一致性。弃土场内主要的产流区域为松散边坡和平台,坡面的侵蚀链是造成区域内产沙量增加的主要原因。

Study on Water Erosion Characteristic in Large Dump of Railway Engineering during Natural Rainfall

To decide the process and factors affected runoff and the characteristic of water erosion of large dump which produced during construction of railway engineering,study of natural rainfall for Hezhuang Dump in Beitongpu railway rebuilding project is made during raining season.The runoff and sediment yield is affected by the process of rainfall and the function of water and soil conservation measurement.The characteristic of top soil will changed by splash erosion and surface erosion,accordingly to alert the route of runoff and seepage and work to unconsistenty of soil erosion.The region of flow produce is loose embankment and the flat roof,the gully erosion chain is the main cause of the sediment yield increase.