施工环境下风积沙地区公路岸坡稳定性分析

针对风积沙地区公路桥梁岸坡设计中施工便道岸坡模型构建的困难性，提出一套基于实际施工环境下的岸坡稳定性分析方法。首先，提取施工便道模型各点三维坐标，运用犀牛软件重新拟合岸坡坡面，建立天然工况模型；其次，将便道地形点引入模型，并把原坡形重合地形点剔除，建立三维岸坡施工便道修筑工况模型；最后，以在建项目内蒙古西拉木伦河特大桥岸坡为研究对象，运用FLAC3D分析天然工况和施工便道开挖模型的稳定性，与传统二维分析方法进行对比，并通过施工探究该分析方法的准确性与可行性。

Stability Analysis of Highway Bank Slope under Construction Environment in Aeolian Sand Area

In view of the difficulty of constructing the bank slope model of highway bridges in the Aeolian sand area, a set of bank slope stability analysis method based on the actual construction environment is proposed. Firstly, the 3D coordinates of each point in the construction road model were extracted and the rhino software was used to re-fit the bank slope surface to establish the natural working condition model. Secondly, the terrain points of the roadways are introduced into the model and the overlapped topographic points of the original slope shape are eliminated to establish the three-dimensional working condition model of the roadways construction on the bank slope. Finally, based on FLAC3D, the bank slope of the Xar Moron River Bridge under construction in Inner Mongolia was taken as the research object to analyze the natural working conditions and the stability of the excavation model of the construction roadways, and the accuracy and feasibility of the analysis method were explored through the construction compared with the traditional two-dimensional analysis method.