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垂直裂隙对黄土边坡降雨入渗特征控制

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为研究降雨条件下坡面垂直裂隙入渗对黄土边坡影响,依据西北地区地质资料,采用有限元软件Geosdtudio中Seep/W模块建立有垂直裂隙的黄土边坡模型,针对降雨条件下黄土边坡坡面含垂直裂隙进行数值分析.结果表明:裂隙对黄土坡体渗流场、位移场影响较大,裂隙是雨水入渗的优势通道,雨水通过裂隙底部和侧壁迅速渗透到周围土壤,并向四周扩散;垂直裂隙的位置会导致土体的体积含水率在不同位置上产生差异,距裂隙 1m处裂隙左侧的土体体积含水率比右侧多2%,而裂隙上部的土体体积含水率比下部多1%;由于土体重力及裂隙角度,裂隙在y方向上的影响更为显著,裂缝的存在会导致土体内部的应力重新分布,导致黄土边坡的滑坡变形.
Control of Rainfall Infiltration Characteristics of Loess Slope by Vertical Fissure
In order to study the influence of vertical crack infiltration on loess slopes under rainfall conditions,a loess slope model with vertical cracks is established by using the Seep/W module in the finite element software Geosdtudio,based on geological data from the northwest China,the vertical fissures in the loess side slope under rainfall conditions are numerically analyzed.The results show that cracks have a significant impact on the seepage field and displacement field of the loess slope.Cracks serve as preferential channels for rainwater infiltration,al-lowing rainwater to quickly permeate through the bottom and sidewalls of the cracks into the surrounding soil and spread outwards.The position of the vertical crack results in differences in the volumetric water content of the soil at different locations.Specifically,the soil volume moisture content on the left side of the fissure 1 m away from the fissure is 2%higher than that on the right side,and the soil in the upper part of the crack has 1%higher vol-umetric water content compared to the lower part.Due to the soil gravity and fracture angle,the fracture has a more significant influence in the y-direction,and the existence of the fracture will lead to the redistribution of stress in the soil,resulting in the landslide deformation of the loess slope.

loess landslidevertical fissurenumerical simulation

赵兴辰、陶传奇

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辽宁石油化工大学 土木工程学院,辽宁 抚顺 113001

黄土滑坡 垂直裂隙 数值模拟

辽宁省教育厅科技项目

LJKMZ20220744

2024

兰州工业学院学报
兰州工业学院

兰州工业学院学报

影响因子:0.205
ISSN:1009-2269
年,卷(期):2024.31(1)
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