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为探求云南省高速公路建设过程中弃渣场的土壤流失特征,以昆明—石林高速公路弃渣场为研究对象,在弃渣场边坡上布设观测小区进行了定位监测,分析了渣体粒径、降雨、堆渣坡度对弃渣场土壤流失的影响以及渣体坡面土壤流失的特点。结果表明:在不考虑其他影响渣体坡面侵蚀因素的情况下,弃渣场渣体的土壤颗粒粒径越大、砾石含量越高,土壤流失量就越大;降雨量越大,土壤流失量就越大;坡度越大,土壤流失量也越大;在渣体坡面侵蚀中,沟蚀现象比较严重,有的流失强度高达37656 t/km2,且以细沟、浅沟侵蚀为主,细沟、浅沟侵蚀量占沟蚀总量的60%以上。
In order to explore the characteristics of soil loss during the construction of expressway in Yunnan Province, taking Kunming-Shilin Expressway spoil ground as the research object, the observation area was laid on the side slope of abandoned spoil yard for location monitoring. Impact of Trail, Rainfall and Stacking Gradient on Soil Erosion in Spoilage Area and Soil Erosion on Slope Body. The results show that without considering other factors affecting the slope erosion of slag body, the larger the particle size of the slag body, the higher the gravel content, the greater the soil loss; the greater the rainfall, the loss of soil The greater the slope, the greater the slope, the greater the amount of soil loss; In erosion of slag body, the gully erosion phenomenon is serious, and some of the loss strength reaches as high as 37656 t / km2. Rill, shallow trench erosion accounted for more than 60% of the total ditch erosion.