多凸块土锚抗拔特性数值模拟分析  

Numerical Simulation Analysis of Uplift Resistance of Soil Anchor with Multiple Convex Blocks

作　　者：张博 夏红兵[1] 蔡海兵[1] Zhang Bo;Xia Hongbing;Cai Haibing(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan,Anhui 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《黑龙江工业学院学报（综合版）》2022年第9期74-79,共6页Journal of Heilongjiang University of Technology(Comprehensive Edition)

基　　金：国家自然科学基金项目“地铁隧道冻结法施工地层三维冻胀融沉的变形机制及预测模型”(项目编号:51778004)。

摘　　要：多凸块土锚是采用专业工具在钻孔侧壁形成凹窝,灌注砂浆或水泥浆,固化后在锚杆体表面形成凸块。为研究凸块对锚杆承载力的影响,用多凸块土锚与等径土锚作对比,运用FLAC^(3D)进行数值模拟分析。研究在不同水平载荷作用下,多凸块土锚与等径土锚的极限承载力、侧摩阻力、水平位移、杆身轴力等。研究结果显示:相同长度的多凸块土锚比等径土锚的极限承载力提高了66.7%;凸块部分分担的荷载最高达到总荷载的76%;达到极限承载力时多凸块土锚的水平位移相较于等径土锚减少明显。Multiple convex blocks anchor uses professional tools to form pits in the side wall of drilling hole,fills with mortar or cement slurry,and forms convex block on the surface of bolt body after curing.To study the influence of the convex block on the bearing capacity of anchor bolt,the soil anchor with multiple convex blocks is compared with the soil anchor with equal diameter,FLAC^(3D) is used to carry out numerical simulation analysis.The ultimate bearing capacity,lateral friction resistance,horizontal displacement and shaft axial force of multiple convex blocks anchor and equal diameter soil anchor are studied under different horizontal loads.The results show that the ultimate bearing capacity of multiple convex blocks anchor increases by 66.7%higher than that of soil anchor with equal diameter in the same length;the load shared by convex block is up to 76%of the total load;when the ultimate bearing capacity is reached,the horizontal displacement of soil anchor with multiple convex blocks decreases obviously compared with that of equal diameter soil anchor.

关 键 词：多凸块土锚 FLAC 3D 承载力 位移 侧摩阻力 轴力 

分 类 号：TU476[建筑科学—结构工程]