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在现场监测的基础上,利用FLAC3D对湖南湘潭至衡阳西线高速公路K124+300路段的倾斜面墙加筋土挡墙进行了施工过程仿真,研究了施工过程中墙内竖向土压力、侧向土压力、侧向变形以及筋带应变的发展过程和挡墙潜在破裂面形态。结果表明,对加筋土挡墙进行施工过程仿真分析可以再现施工过程中挡墙内部的应力应变发展过程;加筋土挡墙的变形主要产生于挡墙的施工期;倾斜面墙加筋挡墙的潜在破裂面不宜采用0.3H法;本文提出的双倾角破裂面考虑了面板倾角的影响,是一种简洁又实用的分析方法。
On the basis of on-site monitoring, the construction process of slantwall reinforced earth retaining wall with slope wall K124 + 300 in Xiangtan-Hengyang west line of Hunan Province was simulated by FLAC3D. The vertical earth pressure in the wall, The development of earth pressure, lateral deformation and tendon strain and the potential rupture surface morphology of retaining wall. The results show that the simulation analysis of the construction process of the reinforced earth retaining wall can reproduce the process of stress and strain in the retaining wall during the construction process. The deformation of the reinforced earth retaining wall mainly results from the construction period of the retaining wall. The potential rupture surface of the wall is not suitable for the 0.3H method. The double-dip rupture plane proposed in this paper considers the influence of the dip angle of the panel and is a concise and practical analytical method.