Reasonable parameter selection of pre-tight anchor for roadway crossing fault fractured zone
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.
pre-tight anchorself-bearing capacity of fault fracture zonereasonable anchor rod parame-tersprestressnumerical simulation
万方数据
维普
