高铁深路堑高边坡支护参数敏感性分析  

Sensitivity Analysis of Support Parameters for High-Speed Railway Deep Cutting High Slope

作　　者：杨廷玺 YANG Tingxi(China Railway 18th Bureau Group Co.Ltd.,Tianjin 300222,China)

机构地区：[1]中铁十八局集团有限公司,天津300222

出　　处：《铁道建筑技术》2025年第2期182-186,共5页Railway Construction Technology

基　　金：中铁十八局集团有限公司科技研究开发计划项目(G18-08)。

摘　　要：为研究抗滑桩支护参数对高路堑边坡稳定性的影响,以德化车站高路堑边坡为研究对象,采用静力和动力强度折减法分别计算不同抗滑桩横截面尺寸、桩间距、桩长和桩身混凝土强度等级下的边坡安全系数,得出最优抗滑桩设计参数,以验证设计方案的合理性。研究结果表明:动力强度折减法计算高路堑边坡安全系数具有较高可靠性;支护参数敏感性依次为桩长>桩间距>桩横截面尺寸>桩身混凝土强度,桩长及桩间距存在最优解,合理桩长为20~25 m、桩间距为4~6 m,增加桩横截面尺寸和混凝土强度对提高边坡安全系数作用有限。适当调整支护参数能够最大程度发挥其性能,同时满足经济性原则。In order to study the influence of support parameters of anti-slide piles on the stability of high cutting slopes,this paper takes the high cutting slope of Dehua Station as the research object.By using the static and dynamic strength reduction methods,the slope safety factors of different cross-sectional dimensions,pile spacing,pile length and concrete strength grades of pile bodies of anti-slide piles are calculated respectively.The optimal design parameters of anti-slide piles are obtained and the design scheme is verified.The research results show that the dynamic strength reduction method has high reliability for calculating the safety factor of high cutting slopes;the sensitivity of support parameters is as follows:pile length>pile spacing>cross-sectional dimension of pile>concrete strength of pile body.There are optimal solutions for pile length and pile spacing,with a reasonable pile length of 20-25 m and pile spacing of 4-6 m.Increasing the cross-sectional dimension of piles and the concrete strength has a limited effect on improving the slope safety factor.Appropriate adjustment of the support parameters can maximize their performance while meeting the principle of economy.

关 键 词：铁路路基 抗滑桩支护 强度折减法 高路堑边坡 敏感性分析 

分 类 号：U213.158[交通运输工程—道路与铁道工程]