不同风化场地下涨壳锚杆抗拔特性现场试验研究  

Field Experimental Study on the Pull-out Characteristics of Expanding Shell Anchor in Different Weathering Sites

作　　者：谢宾 王瑜 陈斌 徐旭东 涂德敏 郑朝阳 XIE Bin;WANG Yu;CHEN Bin;XU Xu-dong;TU De-min;ZHENG Chao-yang(State Grid Wenzhou Electric Power Supply Company,Wenzhou 325000,China)

机构地区：[1]国网浙江省电力有限公司温州供电公司,浙江温州325000

出　　处：《工程建设与设计》2020年第18期44-45,共2页Construction & Design for Engineering

摘　　要：针对普通锚杆在承受拉拔荷载时由于受力不均匀难以充分发挥岩石的承载力的现状,论文选用2种不同风化程度的场地,开展了涨壳和普通锚杆的现场拉拔试验,以深入了解了涨壳锚杆抗拔作用机理及受岩石风化影响程度。试验结果发现,涨壳锚杆在不同风化程度场地中都能提高锚杆拉拔强度。但由于不同场地下岩石锚杆破坏模式不同,风化程度越小的场地,涨壳锚杆的作用效果越好,能够最大限度地提高锚杆抗拔力。In view of the current situation that it is difficult to give full play to the bearing capacity of rock due to the uneven stress of the ordinary anchor when it is subjected to the pull-out load,the field pull-out tests on the expanded shell anchor and the ordinary bolt were conducted in this study under two sites with different weathering degree to deeply understand the anti pulling mechanism of the expanded shell anchor and the influence of the rock weathering degree.It is found that the pullout strength of the expanded shell anchor can be improved in different weathering sites.However,due to the different failure modes of underground rock bolts in different sites,the smaller the weathering degree is,the better the effect of shell expanding bolts is,which can improve the pull-out resistance of anchors to the greatest extent.

关 键 词：涨壳锚杆 抗拔特性 现场试验 风化程度 

分 类 号：TU45[建筑科学—岩土工程]