摘要
通过对偏心荷载作用下锚杆的受力分析,揭示了偏心荷载不利于锚尾工作状态的事实,并得出了偏心荷载处产生的正应力是5～7倍锚尾正应力的结论。建立了一般全锚条件下的锚杆力学模型,给出了锚尾荷载的解析式,并通过对理想全锚条件下锚尾的工作状态分析,阐明了锚尾端渐进破坏其偏心荷载产生的必然性。最后给出了锚尾的破断机制条件,并对其实践指导意义进行了解释。
By analysis of rockbolt-end under eccentric load,it is found that the eccentric load is not good for rockbolt-end work and the stress of rockbolt-end is 5 to 7 times larger than that under centred load. Based on rockbolt mechanics model under general condition,the equations and work status of rockbolt-end load are given. The inevitability of eccentric load brought by its gradual breaking is expounded. Finally,the breaking mechanics conditions of rockbolt-end are given,and corresponding practical meanings are interpreted.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第3期383-386,共4页
Chinese Journal of Rock Mechanics and Engineering
关键词
井巷工程
偏心荷载
力学模型
锚杆
等效力
roadway engineering,eccentric load,mechanics model,equivalent force,gradual breaking,breaking mechanism
