CAJ | 학술논문

通过室内拉拔试验，研究不同侧压系数下锚固失效形式及锚固力的变化规律。研究结果表明：不同侧压系数下锚固破坏以锚杆-锚固层界面脱黏为主，并部分伴有锚固层破碎、锚固层-钻孔壁脱黏；锚杆承受最大荷载随侧压系数的增大而增大，当侧压系数达到1.3时，锚杆所承受最大荷载达到最大值，之后随侧压系数的增大，锚杆所受最大荷载下降；黏结界面随锚固的破坏相继出现弹性变形区、塑性滑移变形区和脱黏变形区，径向荷载主要增加锚杆-锚固层界面塑性滑移变形区的摩擦力，从而增大锚杆拉拔最大荷载。
통과실내랍발시험，연구불동측압계수하묘고실효형식급묘고력적변화규률。연구결과표명：불동측압계수하묘고파배이묘간-묘고층계면탈점위주，병부분반유묘고층파쇄、묘고층-찬공벽탈점；묘간승수최대하재수측압계수적증대이증대，당측압계수체도1.3시，묘간소승수최대하재체도최대치，지후수측압계수적증대，묘간소수최대하재하강；점결계면수묘고적파배상계출현탄성변형구、소성활이변형구화탈점변형구，경향하재주요증가묘간-묘고층계면소성활이변형구적마찰력，종이증대묘간랍발최대하재。
In order to research the invalidation mode of anchor bolt and the changing rule of anchoring force under different lateral pressure coefficients,pull-out tests were performed. The results show that:it was dominated by losing binding between anchor bolt with anchor layer interface accompanying that breaking of anchor layer and also losing binding between anchor layer with drilling hole wall,and the largest load force enlarged with the lateral pressure coefficients increase,when the coefficient reach 1.3,the largest load force of anchor blot was received, after that it was decreased by lateral pressure coefficients increased. The elastic deformation zone,plastic slip deformation zone and the losing binding deformation zone were emerged one after another on binding interface with anchor damaged. The friction force was enhanced by radial load on slip deformation zone between anchor bolt and anchor layer interface and then the largest pull-out load was increased.