高陡人工边坡加固效果数值模拟分析  

Analyzing the reinforcement effect of high man-made slope by modelling

作　　者：徐化新 XU Huaxin

机构地区：[1]福建省泷澄建设集团有限公司,福建龙海363100

出　　处：《福建建设科技》2022年第5期34-38,共5页Fujian Construction Science & Technology

摘　　要：高陡边坡极易发生坡体滑动,本文以某高陡人工边坡工程为研究对象,通过建立三维有限元模型,分别对削坡加固、抗滑桩加固和抗滑桩结合预应力锚索加固三种支护形式的加固效果进行分析。结果表明:经过削坡后,发生较大水平位移的区域明显减小且U型圆弧状滑移段消失;其次,采用抗滑桩支护时,抗滑桩桩顶周边土层仍会发生较大位移,而采用抗滑桩结合预应力锚索支护时,土层位移量将会显著降低;另外,削坡支护与抗滑桩结合预应力锚索支护对边坡稳定性影响的侧重点各不相同,削坡主要通过减小边坡坡度来提高边坡稳定性,而抗滑桩结合预应力锚索支护主要通过减小边坡位移来提高边坡稳定性。High and steep slopes are highly susceptible to sliding. This paper takes a high and steep artificial slope project as the research object, and analyzes the reinforcement effect of three forms of support, namely slope cutting reinforcement and anti-slip pile reinforcement, and anti-slip pile combined with prestressed anchor cable reinforcement, respectively, by establishing a three-dimensional finite element model. The results show that after slope cutting,the area with large horizontal displacement is significantly reduced and the U-shaped arc-shaped slip section disappears;secondly,the soil layer at the top of the anti-slip pile will still have large displacement when anti-slip pile is used,while the soil layer displacement will be significantly reduced when anti-slip pile combined with anchor cable reinforcement is used;in addition, slope cutting and anti-slip pile combined with anchor cable support have different emphasis on slope stability. Slope cutting mainly improves slope stability by reducing slope gradient, while anti-slip pile combined with anchor cable support mainly improves slope stability by reducing slope displacement.

关 键 词：人工边坡 稳定性 削坡 预应力锚索 数值模拟 

分 类 号：TU472[建筑科学—结构工程]