龙茜.高速公路边坡水土流失机理与养护管理研究[J].重庆工商大学学报(自然科学版),2020,37(3):115-120
LONG Qian.Research on Water and Soil Erosion Mechanism and Their Protection Management for the Slope of the Expressway[J].Journal of Chongqing Technology and Business University(Natural Science Edition),2020,37(3):115-120
高速公路边坡水土流失机理与养护管理研究
Research on Water and Soil Erosion Mechanism and Their Protection Management for the Slope of the Expressway
  
DOI:
中文关键词:  高速公路  水土流失  人工降雨模拟实验  产沙量
英文关键词:expressway  water and soil erosion  artificial rainfall simulation test  sediment
基金项目:
作者单位
龙茜 重庆市城市建设投资(集团)有限公司重庆 400023 
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中文摘要:
      对重庆市梁忠高速公路填方路基边坡土壤开展室内模拟降雨试验,分析不同降雨强度和坡度条件下坡面产流和产沙的规律;结果表明:在0.6 mm/min、0.9 mm/min、1.2 mm/min降雨强度条件下,起始产流时间随坡度呈减小趋势,当土体坡度一定时,起始产流时间不断减小,地表径流强度随着降雨强度的增大而增大;当降雨强度一定时,土体的起始产流时间随土体坡度增大逐渐减小,从而反映出地表径流强度不断增大;降雨强度对土壤侵蚀的临界坡度有一定影响,但两者具体变化关系需进一步研究。另外,通过高速公路边坡水土流失机理进行了研究,展开了高速公路边坡水土流失主要诱因分析,提出了科学的高边坡的养护管理措施。
英文摘要:
      This paper conducted indoor simulation test on rainfall for filled soil slope of Liang Zhong Expressway and analyzed the law for sediment and runoff generation under different slopes and different rainfall intensity. Results show that under 0.6mm/min, 0.9mm/min and 1.2mm/min rainfall conditions, the initial runoff time decreases with the change of the slope, when the soil slope is certain, the initial runoff generation time continuously becomes small, and the runoff intensity in the surface of the soil increases with the increase of rainfall intensity. When rainfall intensity is certain, the runoff generation time of the soil becomes smaller with the increase of soil slope, and the runoff intensity of soil surface continuously increases. The critical slope of the soil is about 25°. The rainfall intensity has certain influence on the critical slope of soil erosion, but the real change relation between the two needs to be further studied. Based on the research on water and soil erosion mechanism of the expressway slope, this paper analyzes the causes for water and soil erosion in expressway slope and points out the measures for scientifically protecting the slope of the expressway.
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