CAJ | 학술논문

为研究陕南千枚岩边坡锚杆锚固效果,通过不同的加载方式进行了锚杆拉拔试验,对锚杆应力变化与位移的对应关系及锚杆应力的长期变化进行了总结。结果认为,采用逐级加载方式予以加载时,潜在滑面处应力增加滞后于锚头处应力值;采用瞬时加载至极限抗拉强度方式予以加载时,孔中滑面处钢筋计应力对外荷载不敏感。采用逐级加载方式予以拉拔后,锚杆锚头及潜在滑面处应力均需要经过约一年时间调整,同步达到稳定状态;采用瞬时加载至极限抗拉强度进行拉拔后,孔口应力调整需要较长时间,远长于潜在滑面处应力调整至稳定值的时间。
위연구협남천매암변파묘간묘고효과,통과불동적가재방식진행료묘간랍발시험,대묘간응력변화여위이적대응관계급묘간응력적장기변화진행료총결。결과인위,채용축급가재방식여이가재시,잠재활면처응력증가체후우묘두처응력치;채용순시가재지겁한항랍강도방식여이가재시,공중활면처강근계응력대외하재불민감。채용축급가재방식여이랍발후,묘간묘두급잠재활면처응력균수요경과약일년시간조정,동보체도은정상태;채용순시가재지겁한항랍강도진행랍발후,공구응력조정수요교장시간,원장우잠재활면처응력조정지은정치적시간。
Different loading tests for studying pull-out characteristic for anchor were did for getting anchoring force in phyllite area of south Shan＇xi province,long-term changes for stress and corresponding relationship between stress and displacement were summarized.As the results exposed that stress increasing in the potential sliding surface of the anchor lags behind with which in the head of the anchor when took the level-load mode.While took the instantaneous load to the ultimate tensile strength mode,stress from sliding surface in hole was not sensitive to the external load.Stress from the head of the anchor and the potential sliding surface took about one year to simultaneously reach steady state under the level-load mode.And stress in the hole took a long time to adjust reaching the steady state,longer than the time took by stress from the potential sliding surface under the instantaneous load mode.