高陡边坡的稳定性分析及抗滑桩加固数值模拟  

Stability Analysis of High and Steep Slope and Numerical Simulation of Anti-slip Pile Reinforcement

作　　者：白永宏 BAI Yonghong(Nuclear Industry Jinhua Exploration Design Institute Co.,Ltd.,Jinhua,Zhejiang 321000)

机构地区：[1]核工业金华勘测设计院有限公司,浙江金华321000

出　　处：《中国煤炭地质》2024年第12期49-55,共7页Coal Geology of China

基　　金：浙江省永康市地质灾害风险“一坡一卡”建设项目(ZYCG-临[2024]494号-005)。

摘　　要：我国东部沿海山区存在大量的高陡边坡,且大部分是含砾粉质黏土和粉质黏土,夏季梅雨季节导致边坡土体含水量较高、较湿软,强度降低,极易引发滑坡灾害。抗滑桩以抗滑支挡效果好、对滑体扰动小、便于施工和适应性强等优点广泛应用于边坡加固治理工程中。以东南山区某滑坡治理工程为例,分析了潜在滑坡体的形态、结构特征,并提出了抗滑桩加固措施。利用有限元软件分析了加固效果,并对边坡和抗滑桩的变形和破坏进行了分析,结果表明:无抗滑桩时边坡的安全系数为1.09,处于欠稳定状态,抗滑桩处治后边坡的安全系数为1.44,提升了安全性;桩体在土岩结合部位的弯矩和剪力发生突变,设计时需要综合考虑。结果可为抗滑桩用于滑坡治理工程提供参考。There are a large number of high and steep slopes in the mountainous areas along the eastern coast of China,most of which are composed of gravel silty clay and silty clay.During the Meiyu season in summer,the soil water content of the slope is high,it is relatively wet and soft,and its strength is reduced,which easily leads to landslide disasters.Anti-slip piles are widely used in slope reinforcement and treatment projects due to their good anti slip support effect,minimal disturbance to the landslide,ease of construction,and strong adaptability.Taking a landslide control project in the southeastern mountainous area as an example,the morphology and structural characteristics of potential landslide were analyzed,and anti-slip pile reinforcement measures were proposed.The reinforcement effect was analyzed using finite element software,and the deformation and destruction of the slope and anti-slip piles were analyzed.The results showed that the safety factor of the slope without anti-slip piles was 1.09,which was in an unstable state.After treatment with anti-slip piles,the safety factor of the slope was 1.44,which improved safety.The sudden change in bending moment and shear of the pile at the soil rock joint requires comprehensive consideration in design.The results can provide reference for the use of anti-slip piles in landslide control projects.

关 键 词：滑坡治理 抗滑桩 边坡安全系数 强度折减法 数值模拟 

分 类 号：TU433[建筑科学—岩土工程]