输电杆塔新型涨壳式锚杆抗拔特性室内试验研究  

Laboratory experimental study on pull⁃out characteristics of new expanding shell anchor rod for transmission tower

作　　者：陈宣健 陈峰 苏文祥 郭林 CHEN Xuanjian;CHEN Feng;SU Wenxiang;GUO Lin(College of Civil Engineering and Architecture,Wenzhou University,Wenzhou 325035,China)

机构地区：[1]温州大学建筑工程学院,温州325035

出　　处：《建筑结构》2025年第4期127-131,86,共6页Building Structure

摘　　要：普通岩石锚杆在超过临界锚固长度后再增加锚固长度不能有效提高锚杆的抗拔承载力。为此,自主设计了一种新型涨壳式锚杆,该锚杆在尾部增设一个涨壳头,可有效改善锚杆的抗拔承载性能,并对其进行室内拉拔试验。研究了涨壳式锚杆荷载传递机理,并提出涨壳式锚杆抗拔承载力计算方法。通过试验发现,涨壳式锚杆改变了锚杆的破坏模式,有效改善了锚杆的抗拔性能。拉拔试验结果表明,相比于普通锚杆,涨壳式锚杆极限抗拔承载力更高,只需较小的锚固长度就能达到较高水平的抗拔承载力。Increasing the anchorage length beyond the critical anchorage length cannot effectively improve the pull⁃out bearing capacity of ordinary rock anchor rod.To this end,a new type of expanding shell anchor rod was independently designed by adding a shell head at the tail of the anchor rod,which can effectively improve the pull⁃out performance of the anchor rod,and indoor pull⁃out tests of were conducted on it.The load transfer mechanism of the expansion shell anchor rod was studied,and the calculation method for the pull⁃out bearing capacity of the expansion shell anchor rod was proposed.Through experiments,it is found that the expansion shell anchor rod changes he failure mode of the anchor rod and effectively improves its pull⁃out performance.The results of the pull⁃out test show that compared to ordinary anchor rods,the ultimate pull⁃out bearing capacity of the expanded shell anchor rod is higher,and a high level pull⁃out bearing capacity can be achieved with less anchorage length.

关 键 词：岩石锚杆 抗拔试验 涨壳式锚杆 抗拔承载力 

分 类 号：TU476[建筑科学—结构工程]