黄土深路堑边坡稳定性分析及边坡坡型的合理设计

摘要

边坡的稳定状况直接关系着工程的施工安全、运营安全和建设成本等.如何合理设计边坡,一直是工程设计中的一个重要环节,也是工程设计的一个难点.以某工程为例,利用有限元方法计算分析了不同高度不同坡率下黄土边坡的受力特性.研究表明:路堑开挖过程中,在边坡高度不变的情况下,边坡坡率越缓,坡脚的应力越小,但是随着坡率的逐渐变缓,应力变化趋于缓和.笔者通过比较各种边坡形式,综合评价了黄土深路堑边坡的稳定状况,为边坡的坡型设计和施工提供了可靠的依据.%The stability of a slope has direct effects on the construction safety, operation safety, construction costs etc. How to rationally design the slope is a important part of engineering design, also is a difficult point all the time. In the thesis, a project was taken as an example, so that the mechanical characteristics of loess slope with different heights and different slope ratios could be calculated and analyzed by using FEM. The research shows: in the process of slope excavating with the same slope height, the slower the slope ratio is, the smaller the stress at the slope toe becomes. However, with the slope ratio slows gradually, the change of the stresses tends to moderate. Furthermore, through comparing various slope shapes, the author carried out a comprehensive evaluation on the stability of the loess slope of deep cutting, which will provide reliable basis for the slope shape design and the slope construction.