路堑边坡施工过程中后缘变形演化分析

在路堑边坡施工过程中,研究边坡后缘的变形趋势可以较早地提供整个边坡的变形的信息,对整个施工过程有实际的工程意义。基于数值模拟和现场监测结果,以漳州招银疏港高速公路A3标边坡(ZK14+165)为例来探索在施工过程中路堑边坡上缘的变形演化过程。结果表明:1)除了新开挖平台由于卸荷引起的变形以外,边坡上缘是产生变形的主要区域;2)随着开挖施工的进行,上缘变形越来越大,靠近开挖面处最大;3)变形发生在坡顶以上10m左右的范围内(针对此开挖高度为38.8m的路堑边坡),变形区域由上缘坡面到开挖面近似螺旋曲线的形状。

Deformation at the Crest of Highway Cut Slopes

The progressive deformation at the crest of highway cut slopes can provide first-hand information on the entire stabil- ity and deformation of the cut slopes; therefore, it has a practical meaning to study the deformation at the crest. Based on the numerical analysis results and the monitored data, this paper presents a case history of the progressive deformation at the crest of a cut slope in Bid Package A3 （ZK14＋ 165） of Zhaoyin Highway Project in Zhangzhou. The results have the following con clusions,, 1） Except for the unloading deformation on the newly excavated benches, the deformation zone at the crest has the predominant displacements; 2） The deformation increase with the depth of the cut and the largest deformation is close to the slope; 3） For a cut depth of 38.8 meters slope, the deformation occurs within a 10-meter horizontal zone to the edge and a spi- ral deformation curve can be found from the crest to the toe of the slope.