Pre-tight anchor can form a relatively uniform distribution of prestress in the fault fracture zone to improve the self-bearing capacity of the fault fracture zone.Reasonable selection of pre-tight anchor support parameters is crucial to ensure the reasonable load-bearing structure of the fault frac-ture zone.Combined with the actual engineering situation,a numerical calculation model for prestress analysis of fault fracture zone is established by using numerical simulation method to analyze the mag-nitude,distribution and superposition of prestress in the fracture zone under the action of pre-tight an-chor.The self-bearing structure thickness of the fault fracture zone is taken as the relatively uniform distribution range of prestress,and the increment of the bond force and internal friction angle of the fault fracture zone is analyzed based on the magnitude of prestress.The thickness and increment are used as the evaluation index to improve the self-bearing capacity of fault fracture zone.The magnitude and distribution of prestress under different values of anchor bolt pre-tightening force,bolt length and anchor bolt row distance are analyzed,and then reasonable bolt parameters are selected to make the self-bearing structure of fault fracture zone bear reasonable load.
关键词
预紧力锚杆/断层破碎带自承载力/合理锚杆参数/预应力/数值模拟
Key words
pre-tight anchor/self-bearing capacity of fault fracture zone/reasonable anchor rod parame-ters/prestress/numerical simulation
维普
万方数据