顺层边坡让剪让压型锚拉桩预加固结构承载性能数值模拟研究  

Numerical Simulation Study on the Load-bearing Capacity of Pre-reinforced Structure of Yielding Anchor Piles on Bedding Slopes

作　　者：仪龙 王俊杰 黄杰 吕川 YI Long;WANG Jun-jie;HUANG Jie;LÜChuan(College of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China;College of Materials Science and Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]重庆交通大学材料科学与工程学院,重庆400074

出　　处：《中国农村水利水电》2024年第10期227-234,共8页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(52378327);重庆市研究生联合培养基地建设项目(JDLHPYJD2020026)。

摘　　要：针对顺层边坡的灾害防治问题,采用在边坡岩土体和锚索以及抗滑桩之间设置柔性材料垫层的让剪让压型锚拉桩预加固结构。通过有限元数值模拟方法,分析让压层材料弹性模量(E_(1))、厚度(D)和让剪层材料弹性模量(E_(2))、厚度(d)对让剪让压型锚拉桩承载性能的影响。研究结果表明:让剪让压型锚拉桩的桩身水平位移、内力以及锚索轴力相较于普通锚拉桩均明显减小。E_(1)、E_(2)越小或D、d越大,桩身水平位移、桩身内力和锚索轴力均减小,桩身剪力和弯矩峰值均在桩身中下部分出现。影响让剪让压型锚拉桩承载性能的因素敏感性依次为D、E_(1)、d、E_(2)。For the disaster prevention and control problems of down-gradient slopes,a pre-reinforcement structure of yielding anchor pile with a flexible material bedding layer between the soil body of the slope and the anchor cables as well as the anti-slip piles is used.The finite element numerical model is constructed to analyze the effects of the modulus of elasticity(E_(1))and thickness(D)of the let-shear layer and the modulus of elasticity(E_(2))and thickness(d)of the let-shear layer on the load-bearing capacity of the yielding anchor pile.The results show that the horizontal displacement,internal force and axial force of anchor cable of yielding anchor piles are significantly reduced compared with those of ordinary anchor piles,and the smaller E_(1) and E_(2) or the larger D and d are,the horizontal displacement,internal force and axial force of anchor cable are reduced,and the peaks of shear force and bending moment of the pile body are in the middle and lower parts of the pile body.The sensitivities of the factors affecting the load-bearing capacity of yielding anchor piles are D,E_(1),d,E_(2) in order.

关 键 词：顺层边坡 让剪让压型锚拉桩 正交分析 数值模拟 

分 类 号：TV223[水利工程—水工结构工程]