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首页> 外文期刊>Japanese Geotechnical Journal >Relationship between shear deformation and soil moisture content due to rainfall in a surface soil of granite slope
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Relationship between shear deformation and soil moisture content due to rainfall in a surface soil of granite slope

机译：花岗岩坡面表层土壤降雨引起的剪切变形与土壤含水量的关系

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摘要

To clarify the mechanism of the surface failure, the authors were measuring the relationship between shear strain and soil moisture content in a natural granite soil slope. The shear deformations were generated according to the infiltration of the rainfall. Because the depth of occurrences of shear deformation was same to the depth of increase of volumetric water content, we considered the deformation occurred according to the variation in the soil moisture content by the rainfall infiltration. Though in the summer season the shear deformation occurred in moist process according to rainfall and it returned slowly in the drying process after the rainfall, it was confirmed the transformation accumulated in the shallow layer after the second half of September. In this study we examined the influence that the soil moisture content gave shear strain using data obtained through our monitoring. As a result, we understood the shear strain was readily generated when the initial soil moisture content was high and the increasing of the soil moisture content was rapid. Thus, we showed the possibility that a large shear deformation is generated in a slope if the heavy rainfall occurred under the high soil moisture condition effected by the preceding rainfall.
机译：为了阐明表面破坏的机理，作者正在测量天然花岗岩土质边坡中的剪切应变与土壤水分之间的关​​系。剪切变形是根据降雨的渗透而产生的。由于剪切变形的发生深度与体积含水量增加的深度相同，因此我们认为变形是根据降雨入渗引起的土壤含水量变化而发生的。尽管在夏季，降雨导致剪切变形发生在潮湿过程中，并且在降雨之后在干燥过程中缓慢恢复，但可以确定的是，在9月下半月之后，浅层中积累了相变。在这项研究中，我们使用通过监测获得的数据，研究了土壤水分对剪切应变的影响。结果，我们知道当初始土壤水分含量高而土壤水分含量迅速增加时，容易产生剪切应变。因此，我们表明，如果在前一次降雨影响下的高土壤湿度条件下发生大降雨，则在斜坡上会产生较大的剪切变形。

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