高速公路边坡预应力锚索桩板墙结构参数优化与受力特征分析  

Structural Parameter Optimization and Stress Characteristic Analysis of Prestressed Anchor Cable Pile Sheet Wall in Expressway Slope

作　　者：刘兴雷 吴顺川[1,2] 韩龙强 曹振生 LIU Xing-lei;WU Shun-chuan;HAN Long-qiang;CAO Zhen-sheng(Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine,University of Science and Technology Beijing,Beijing 100083,China;Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Power China Road and Bridge Group Co.,Ltd.,Beijing 100048,China)

机构地区：[1]北京科技大学,金属矿山高效开采与安全教育部重点实验室,北京100083 [2]昆明理工大学国土资源工程学院,昆明650093 [3]中电建路桥集团有限公司,北京100048

出　　处：《科学技术与工程》2024年第15期6439-6447,共9页Science Technology and Engineering

基　　金：国家自然科学基金(42302313);中国博士后科学基金(2023T160283)。

摘　　要：桩板墙是高速公路滑坡治理中常用的一种支护措施,其结构参数的优化设计是工程施工的研究重点。以云南省红河州建水(个旧)至元阳高速公路工程AK0+560~AK0+660段桩板墙工程为背景,采用数值模拟与灰色关联分析、正交试验设计相结合的方法,研究桩体嵌固长度、桩间距、桩宽3种结构参数的影响与优化,最终验证优化后的结构参数在地震工况下的稳定性。结果表明:桩间距为主要影响因素,桩体嵌固长度和桩宽的关联度相近,为次要影响因素;桩板墙结构参数最优组合为桩体嵌固长度15.0 m、桩间距5.0 m、桩宽3.0 m;地震工况下,抗滑桩悬臂段土压力以及桩身偏移量和沉降差满足规范要求,边坡稳定性较好。Pile sheet wall is a commonly used support measure in landslide control of highways,and the optimization design of its structural parameters is a research focus in engineering construction.Taking the pile sheet wall project of AK0+560~AK0+660 section of Jianshui(Gejiu)to Yuanyang Expressway in Honghe Prefecture,Yunnan Province as the background,the influence and optimization of three structural parameters of pile embedded length,pile spacing and pile width were studied by combining numerical simulation with grey correlation analysis and orthogonal test design,and finally the stability of the optimized structural parameters under earthquake conditions was verified.The results show that the pile spacing is the main influencing factor,and the correlation between the embedded length and the pile width is similar,which is the secondary influencing factor.The optimal combination of the structural parameters of the pile-sheet wall is the pile embedded length of 15.0 m,the pile spacing of 5.0 m,and the pile width of 3.0 m.Under seismic conditions,the earth pressure at the cantilever section of the anti-slide pile,as well as the displacement and settlement difference of the pile body meet the specification requirements,and the slope stability is good.

关 键 词：高速公路 预应力锚索桩板墙 结构参数优化 地震响应 数值模拟 

分 类 号：U417.1[交通运输工程—道路与铁道工程]