杨卓, 高全臣, 万烨, 张文强, 谭潮永, 束凯. 端部包裹式扩体锚杆承载特性现场试验研究[J]. 煤炭学报, 2016, 41(S1): 29-34. DOI: 10.13225/j.cnki.jccs.2015.1410
引用本文: 杨卓, 高全臣, 万烨, 张文强, 谭潮永, 束凯. 端部包裹式扩体锚杆承载特性现场试验研究[J]. 煤炭学报, 2016, 41(S1): 29-34. DOI: 10.13225/j.cnki.jccs.2015.1410
YANG Zhuo, GAO Quan-chen, WAN Ye, ZHANG Wen-qiang, TAN Chao-yong, SHU Kai. Field-test on bearing features of end-packaged expansion anchor[J]. Journal of China Coal Society, 2016, 41(S1): 29-34. DOI: 10.13225/j.cnki.jccs.2015.1410
Citation: YANG Zhuo, GAO Quan-chen, WAN Ye, ZHANG Wen-qiang, TAN Chao-yong, SHU Kai. Field-test on bearing features of end-packaged expansion anchor[J]. Journal of China Coal Society, 2016, 41(S1): 29-34. DOI: 10.13225/j.cnki.jccs.2015.1410

端部包裹式扩体锚杆承载特性现场试验研究

Field-test on bearing features of end-packaged expansion anchor

  • 摘要: 选取实际工程场地,通过一系列的抗拔试验对新型端部包裹式扩体锚杆的承载特性及其影响因素进行研究。试验中,通过改变锚杆扩体锚固段直径、锚固段长度、埋置深度、锚头土体密实度等因素,得到了相应参数下反映承载能力的荷载-位移曲线。研究结果表明:扩体锚固段直径与锚头土体密实度是影响扩体锚杆承载力最主要因素,并且锚固段直径与承载力成一定倍数增长关系;锚固段长度与承载力呈线性增长关系;在端阻力未达到极限状态时,扩体锚杆位移主要取决于杆体的弹塑性变形;当端阻力超过极限状态,锚杆发生整体变形位移由锚固体的拉伸变形决定。与传统扩体锚杆及普通锚杆的相比,新型扩体锚杆有效提升了锚杆极限抗拔承载力。

     

    Abstract: A field pull-out test was conducted to study the bearing features of end-packaged expansion anchors through varying the parameters of diameter,membrane length,embedment depth,solid density,and a series of corresponding load-displacement curves. The results show that the diameter of anchored solid and the solid density of anchor end were the most important factors affecting the bearing capacity of anchors,moreover. The relationship between the diameter of anchored solid and solid density shown a certain ratio growth. The relationship between membrane length and bearing features shown linear growth. The displacement of end-packaged expansion anchor was decided by its elasticplastic under limit end resistance state,when the end resistance expanded ultimate state decided by its tensile deformation. Comparing with traditional expansion anchors and common anchors,the extreme limit of anti-lifting bearing capacity of new end-packaged expansion anchors was effectively improved.

     

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