期刊文献+

拉拔作用下端部扩大型锚杆锚固段受力分析 被引量:4

Analysis of the anchorage segment under pullout for end expanding anchor
下载PDF
导出
摘要 端部扩大型锚杆的锚固段分为普通锚固段和扩大头锚固段,通过对6根端部扩大型锚杆进行现场抗拔试验和运用MI-DAS/GTS软件模拟出锚杆荷载弹性和塑性位移曲线、轴力及侧摩阻力作用下的锚固段长度分布图,发现抗拔力较小时,锚杆位移随荷载呈线性变化,起主要作用的是普通锚固段的侧摩阻力;抗拔力较大时,锚杆位移处于弹塑性阶段且位移较大,在扩大头锚固段侧摩阻力发挥的同时扩大端会对端头前的土体产生挤密作用,促使端阻力增大。在此基础上进一步得出锚杆锚固段在弹性和弹塑性阶段其侧摩阻力的变化规律以及端阻力充分发挥时所施加的抗拔力的大小,从而为下一步开展端部扩大头锚杆的承载机理分析和指导工程实际提供了理论支撑。 The anchorage segments of end expanding anchor can be classified into ordinary type anchorage segment and expanding anchorage segment. Based on the field test on six end expanding anchors, we simulated the elasticity and plasticity displacement curve and the anchorage length distribution under the axial force and lateral friction by means of MIDAS/GTS software. It is found that the displacement of anchor is interrelated with the pulling force. When the pulling force is large, the displacement of anchor is in the elastic-plastic stage and the displacement is also large. Meanwhile, the compaction effect will be generated on the soil before the expanding end, which can increase the end resistance. The behavior of anchorage segment and withdrawal resistance in the elastic stage and elastic-plastic stage were further obtained, which provides a theoretical support for the bearing mech- anism analysis of expanding anchor and guides the engineering practice.
出处 《中国科技论文》 CAS 北大核心 2013年第5期381-384,共4页 China Sciencepaper
基金 山西省科技攻关资助项目(20100321070)
关键词 MIDAS GTS 端阻力 侧摩阻力 抗拔试验 MIDAS/GTS end resistance lateral friction pullout test
  • 相关文献

参考文献14

二级参考文献115

共引文献744

同被引文献86

引证文献4

二级引证文献8

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部