微型桩倾斜角度和桩径对含软弱下卧层边坡稳定性的影响  

Influence of Micro-pile Inclination Angle and Pile Diameter on Stability of Slope with Soft Underlying Layer

作　　者：周朝磊 Zhou Chaolei(Guizhou Geological and Mineral Foundation Engineering Co.,Ltd.,Guiyang,China)

机构地区：[1]贵州地矿基础工程有限公司,贵州贵阳

出　　处：《科学技术创新》2025年第1期178-181,共4页Scientific and Technological Innovation

摘　　要：为探究倾斜微型桩在含软弱下卧层边坡的承载特性,基于有限元强度折减法,分别对不同倾斜角度和桩径的微型桩支护下的含软弱下卧层边坡进行了数值模拟,探讨了微型桩倾斜角度和桩径对边坡稳定性的影响。结果表明:相比未设桩边坡,微型桩提高了边坡的安全系数,有效阻碍了滑弧面的发展,提高了边坡的稳定性。在边坡倾角为45°下,微型桩的最优倾斜角度为15°。桩径对边坡稳定性提升存在临界值,达到临界值之后稳定性提升显著。无论设桩与否,滑弧面经过软弱下卧层,且最大塑性应变出现在软弱下卧层。In order to explore the bearing characteristics of inclined micro-piles on the slope with soft and weak underlying layer,based on the finite element strength reduction method,the numerical simulation of the slope with soft and weak underlying layer supported by micro-piles with different inclination angles was carried out,and the influence of the inclination angle of the micro-piles on the stability of the slope was discussed.The results show that compared with the slope without piles,the micro-piles improve the safety factor of the slope,effectively hinder the development of the sliding arc surface,and improve the stability of the slope.Under the slope inclination angle of 45°,the optimal inclination angle of the micro-piles is 15°.There is a critical value for the stability improvement of the slope by the pile diameter,and the stability improvement is significant after reaching the critical value.No matter whether the pile is set or not,the sliding arc surface passes through the soft and weak underlying layer,and the maximum plastic strain appears in the soft and weak underlying layer.

关 键 词：边坡稳定性 倾斜微型桩 桩径 软弱下卧层 强度折减法 

分 类 号：TU442[建筑科学—岩土工程]