结合现场工程实际,根据渗透张量计算程序得到灰岩渗透张量,针对不同降雨工况,对比分析边坡在加固前后位移和安全系数变化规律,以及坡体加固结构在降雨作用下轴力变化规律.通过降雨后边坡位移分析,边坡在没有进行加固时,最大位移发生在边坡下部,中部次之,上部位移最小.在降雨强度为200 mm/d降雨4 d后,边坡坡脚处位移迅速增加,对应的安全系数也降低到最小值;采用预应力锚索加固措施后,边坡稳定性大幅提升,边坡加固后,边坡位移非常小,安全系数最小值较未加固时边坡最小安全系数有大幅提高;预应力轴力随着降雨的持续逐渐增大,最大轴力出现在边坡下部位移最大位置,随着降雨持续时间增加,位移边坡中上部分锚索轴力变化平稳,位于坡脚处锚索轴力增大幅度较大.%According to different rainfall conditions and permeability tensor of limestone which calculated by the permeability tensor calculation program. The change of displacement and safety factor of slope before and after reinforcement are compared and analyzed. The changes of axial force of slope reinforcement structure under rainfall are compared and analyzed. The following conclusions were obtained: after the slope displacement analysis of the slope without reinforcement after rainfall, the maximum displacement occurred in the lower part of the slope, followed by the middle, the upper part of the smallest displacement. After the rainfall intensity of 200 mm/d for 4 days, the displacement at the slope foot of the slope increased rapidly, and the corresponding safety factor was reduced to the minimum; The stability of the slope was enhanced by using the prestressed anchor cable, and the slope displacement was very small after the slope was strengthened. The minimum safety factor was much higher than the minimum safety factor when the slope was not strengthened. The axial force of the prestressing force was gradually increased with the rainfall, and the maximum axial force was appeared in the displacement position of the lower part of the slope. With the increase of rainfall duration, the axial force of the upper part of the slope in the displacement slope was stable, and the axial force of the anchor cable at the foot of the slope was increased greatly.
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