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针对土工格室柔性护坡技术的前期阶段,经常出现边坡整体失稳这一问题,利用ABAQUS建立边坡-土工格室-铆钉之间相互作用的三维有限元模型,采用强度系数折减法,以边坡坡顶的位移突变作为边坡失稳判断的标准,将计算所得到的不同铆钉分布情况下土工格室防护边坡的稳定安全系数进行比较,并在降雨条件下模拟分析了生态边坡稳定性的变化情况.计算结果表明:土工格室通过控制塑性区的发展很好地提高了边坡的整体稳定性;在格室中添加铆钉以及减小铆钉的分布间距均可有效地提高边坡的稳定性,而铆钉长度的作用效果则不明显;格室可减小降雨对土体更深部位的影响,达到应力重新分布的作用;边坡在降雨条件下最大水平位移发生在坡脚,降雨入渗将明显改变边坡塑性区的发展状况.
Aiming at the problem of geotechnical cell flexible slope protection technology, the instability of the slope often occurs. A three-dimensional finite element model of slope-geocell-rivet interaction is established by ABAQUS. As a standard of slope instability judgment, the displacement and deformation of the slope top are compared. The stability safety coefficient of the geocell protective slope under different rivets distribution is compared. Under the condition of rainfall, the ecological slope The results show that the geocell improves the stability of the slope well by controlling the development of the plastic zone. Addition of rivets in the cell compartment and reducing the distribution of rivets can effectively improve the stability of the slope Slope stability, but the role of the rivet length effect is not obvious; lattice chamber can reduce the impact of rainfall on deeper parts of the soil to achieve the role of stress redistribution; slope maximum horizontal displacement in the rainfall occurred at the foot of the slope, Rainfall infiltration will obviously change the development of slope plastic zone.