坦桑尼亚公路项目冲沟形成研究分析及危害处理措施

Research and Analysis of Gully Formation in Tanzania Highway Project and Treatment Measures

冲沟侵蚀是一种非常常见的土壤侵蚀形式,严重影响了土地的使用,并可能对基础设施造成很大威胁。论文通过采集现场土样,分析其塑性性能、内摩擦角和黏聚力,并基于可蚀性因子公式研究其可蚀性等级;通过现场测绘和分水岭模型研究其地表水流向和径流量,以此明确地表水径流量与冲沟形成关系。最终得出结论:冲沟的侵蚀是由于地表雨水不断对研究区域的土壤进行冲刷形成。由此提出阻止冲沟的进一步侵蚀的措施,旨在保护公路路基安全。

Gully erosion is a very common form of soil erosion,which seriously affects land use and may pose a great threat to infrastructure.In this paper,through the collection of field soil samples,analysis of its plastic properties,internal friction angle and cohesion,and based on the erodibility factor formula to study its erodibility grade;through field mapping and watershed model to study its surface water flow direction and runoff,so as to clarify the relationship between surface water runoff and gully formation.Finally,the conclusion is drawn that gully erosion is caused by the continuous erosion of the soil by surface rainwater.Therefore,measures to prevent further erosion of gullies are put forward to protect the safety of highway subgrade.