摘要
为了分析影响可回收式锚杆抗拔力的因素,在对可回收式锚杆现场拉拔试验研究的基础上,建立可回收式锚杆三维有限元模型。通过数值模拟分析,探讨可回收式锚杆的受力机理和破坏形式,得到可回收式锚杆的锚固体与周围土体之间的界面剪应力分布和传递规律。分析表明,可回收式锚杆的破坏主要是由于锚固体与周围土体之间的界面剪应力大于界面粘结力而引起的,而且界面剪应力分布不仅与外荷载、锚固长度和锚固体半径有关,锚固体也存在着临界长度和临界半径。
In order to analyze the factors which influence the withdrawal resistance of removable anchor, a three-dimension finite element model was established based on the pullout test of removable anchor. Through calculating with various parameters of the model, the load-bearing mechanism and destruction forms of the anchorage were discussed, and the distribution of interfacial shear stress between the bonding segment and soil was obtained. The results indicate that the reason of the anchor＇ s destruction is that the interfacial shear stress is greater than the interfacial adhesion. Furthermore, the interfacial shear stress is related to loads, anchorage length and radius, and the bonding segment has critical length and critical radius.
出处
《解放军理工大学学报（自然科学版）》
EI
北大核心
2009年第2期170-174,共5页
Journal of PLA University of Science and Technology(Natural Science Edition)
基金
江苏省"333高层次人才工程"资助项目(B08003)
关键词
可回收式锚杆
界面剪应力
锚固段
临界长度
数值模拟
removable anchor
interfacial shear stress
bonding segment
critical length
numerical simulation
作者简介
庞有师（1966-），男，副教授；研究方向：岩土工程与濒海工程；E—mail：uspang@163．com．
