注浆支盘式锚杆承载特性数值模拟分析  

ANALYSIS AND OPTIMIZATION OF PULL-OUT BEARING CAPACITY OF GROUTING BRANCH-TYPE ANCHOR ON ABAQUS

作　　者：谷复光[1] 王军 常虹[1] GU Fuguang;WANG Jun;CHANG Hong(School of Exploration Engineering,Jilin Jianzhu University,Changchun 130118,China)

机构地区：[1]吉林建筑大学测绘与勘查工程学院,长春130118

出　　处：《低温建筑技术》2024年第7期134-138,共5页Low Temperature Architecture Technology

基　　金：吉林省科技发展计划项目(20230203045SF)。

摘　　要：注浆支盘式锚杆作为一种新型扩体锚杆,具有优越的抗拔性能。为进一步研究探索注浆支盘式锚杆抗拔承载力特性规律,拟用ABAQUS有限元分析软件对注浆支盘式锚杆进行数值模拟分析,通过改变锚杆支盘盘径、锚固段长度以及杆径研究其抗拔承载力变化规律。模拟结果表明,当注浆支盘式锚杆盘径增大时,其抗拔承载力提升;当锚固段长度大于等于8m时,更能发挥支盘处盘端阻力与锚固段侧摩阻力的协同作用;杆径为100mm时注浆支盘式锚杆抗拔承载力显著不足。数值模拟数据可以为注浆支盘式锚固结构在实际工程上应用提供理论基础。Grouting branch-type anchor is a new type of expansion anchor,which has good pullout resistance.In or⁃der to further investigate the uplift bearing capacity of grouting branch-type anchor,numerical simulation analysis of grouting branch-type anchor is conducted by using ABAQUS finite element analysis software.By changing the diam⁃eter of the anchor rod support plate,the length of the anchoring section,and the diameter of the rod,the variation law of its uplift bearing capacity is studied.The simulation results show that as the diameter of the grouting branch-type anchor increases,the uplift bearing capacity increases.When the length of the anchoring section is greater than or equal to 8 m,the synergistic effect of the end resistance of the support plate and the lateral friction resistance of the anchoring section is good.The pull-out bearing capacity of the grouting support plate anchor rod with a diameter of 100 mm is significantly insufficient.Numerical simulation data may provide a theoretical basis for the practical ap⁃plication of grouting branch-type anchor in engineering.

关 键 词：支盘式锚杆 侧摩阻力 盘端阻力 

分 类 号：TU413.5[建筑科学—岩土工程]