吉图珲高速铁路GDK283段膨胀土深路堑工程滑坡分析

摘要

The causes of the expansive soil of Jilin-Tumen-Hunchun high-speed railway in Yanji basin area are complicated, which makes it very difficult to evaluate slop stability due to the effects of terrain and geological conditions and natural climate environment, the poor engineering geological condition and the their serious impacts on deep cutting. In view of the engineering landslide of the deep expansive soil cutting in GDK283 section, this paper calculates expansive soil slope stability in consideration of various influencing factors and boundary conditions and based on the analysis of the mechanism of the engineering landslide, the summary of the engineering geological characteristics of expansive soil in Yanji area, and the full use of the survey and test data. The results are verified in engineering practice.%吉图珲高速铁路所经延吉盆地一带的膨胀土成因复杂，受地形条件、地质条件及自然气候环境影响大，工程地质条件极差，对路堑工程影响严重，定量评价边坡稳定性困难。以GDK283段膨胀土深路堑工程滑坡为实例，通过分析研究工程滑坡发生的机理，总结延吉地区膨胀土的工程地质特征，充分利用勘察试验数据，综合考虑各种影响因素和边界条件，进行膨胀土的边坡稳定性分析验算，并在工程实践中予以验证。