论文部分内容阅读
该文以日本长野县野底川流域的割泽支流域为对象 ,用土壤剖面法和简易打击试验法对坡面治理工程施工地的土壤硬度及厚度变化进行了调查 .用长谷川式简易打击机所得到的调查结果表明 ,坡面治理工程施工后的斜坡土壤硬度的变化是很复杂的 ,与土壤深度没有明显的关系 .土壤A层厚度随着坡面治理工程经过年数的增多而有增大的趋势 ,而简易打击试验所得到的打击值在 1 5cm/次以上的表层土壤厚度的变化却与坡面治理工程经过年数没有关系 ,而可能受施工时挖、填土状况的影响 .本次调查结果进一步证实为了改善植物根系的生育环境 ,必须增大表层土壤的厚度
In this paper, we investigated the changes of soil hardness and thickness in slope construction site with the soil profile method and simple hit test method in the Choseizu basin of Yedichuan watershed, Nagano Prefecture, Japan. The results of the survey show that the change of slope soil hardness after the construction of slope control engineering is very complicated and has no obvious relationship with soil depth.The thickness of layer A increases with the increase of years of slope control engineering However, the change of surface soil thickness above 1 5cm / time with impact value obtained by simple strike test has nothing to do with the number of years of slope control project, which may be affected by excavation and filling conditions during construction. The findings further confirmed that in order to improve the plant’s reproductive environment root, we must increase the thickness of the top soil