摘要
为了探讨加筋三维网–锚杆柔性防护下边坡的结构特性,在室内模型试验的基础上,采用FLAC3D建立分析模型,通过分级加载,获得了边坡应力应变分布规律,并讨论了锚杆长度、边坡坡率、土体强度指标等对边坡稳定性的影响。结果表明:坡顶超载作用下边坡的变形随荷载增加而增大,坡面水平位移为中部大、上下小的“臌胀”形,坡面竖向位移自坡顶向下逐渐减小;锚杆轴力在轴线方向上呈“抛物线”型分布,锚杆轴力的最大值和所在位置随锚杆布设高度的降低而减少,并逐渐靠近坡面;边坡的稳定性系数随锚杆长度和土体强度指标的增加而增大,但随边坡倾角的增大而减小。
In order to study the structural characteristics of slope under the flexible protection of reinforced three-dimensional mesh-anchor, a numerical model was established by FLAC3D on the basis of indoor model test. The stress-strain distribution law of slope was obtained by step loading, and the effects of anchor length, slope rate and soil strength index on slope stability were discussed. The results show that the deformation of slope increases with the increase of load, the horizontal displacement of slope surface is “bulging” shape with large middle and small upper and lower, and the vertical displacement of slope surface decreases gradually from top to bottom;the axial force of the bolt was a parabolic distribution along the axis direction, the maximum value and location of the axial force of the bolt decrease with the decrease of the height of the bolt and gradually approach the slope;the stability coefficient of slope increases with the increase of anchor length and soil strength index, but it decreases with the increase of slope inclination angle.
出处
《土木工程》
2019年第8期1267-1275,共9页
Hans Journal of Civil Engineering
基金
湖南省自然科学基金项目(2017JJ2087),浙江省交通科技项目(2017028,2017033)浙江省交工集团科研项目(JGYF-2017-024),浙江建筑业技术创新项目(2018A03),浙江省建设科技项目(2018K050)。
