不同深度的锚杆抗拔承载力分析  

Analysis of Uplift Bearing Capacity of Anchor Bolts with Different Depths

作　　者：龚鹤钦 Gong Heqin(Fujian Hongjian Engineering Testing Co.Ltd.,Putian,Fujian 351131)

机构地区：[1]福建省鸿建工程检测有限公司,福建莆田351131

出　　处：《江西建材》2022年第6期86-87,共2页Jiangxi Building Materials

摘　　要：锚杆被广泛应用于隧道围岩和基坑支护、边坡加固和滑坡治理工作当中。文中通过对锚杆作用机理研究并通过对轴向抗拔力分布检测得到以下结论:锚杆将施加的轴向荷载传递给粘结材料,粘结材料通过相互之间的摩擦使锚杆作用的土体承载能力提高。锚杆轴向抗拔力主要分为三个阶段:“急剧下降段”“平稳变化段”和“无抗拔力段”,其中,急剧变化阶段抗拔力变化最为显著,初始荷载下降达到50%~60%,在“无抗拔力段”末期轴向抗拔力趋于0。Bolt is widely used in tunnel surrounding rock and foundation pit support, slope reinforcement and landslide treatment. In this paper, through the study of the action mechanism of the bolt and the detection of the axial pull-out force distribution, we can get the following conclusions: the bolt transmits the applied axial load to the bonding material, and the bonding material improves the bearing capacity of the soil under the action of the bolt through mutual friction. The axial pull-out force of anchor bolt is mainly divided into three stages: "sharp decline section", "stable change section" and "no pull-out force section". The pull-out force changes most significantly in the sharp change stage, the initial load decreases by 50% ~60%, and the axial pull-out force tends to 0 at the end of the "no pull-out force section".

关 键 词：锚杆 作用机理 抗拔力 轴向分布 

分 类 号：TU476[建筑科学—结构工程]