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根据锚杆杆体的轴向变形与围岩加固区的变形相协调,利用围岩加固区的变形确定锚杆的轴向变形,进而由应力应变关系求出锚杆荷载。在求加固区变形的过程中,将锚杆上的荷载近似的看作是分布在加固区边缘的均布荷载,求出硐室分别在地应力和锚杆荷载作用下的位移,锚杆两端的合位移即为加固区的变形,这样可以确定锚杆荷载与围岩参数的函数关系。
According to the axial deformation of the anchor rod body and the deformation of the surrounding rock reinforcement zone, the deformation of the surrounding rock reinforcement zone is used to determine the axial deformation of the anchor rod and the bolt load is obtained from the stress-strain relationship. In the course of seeking the deformation of the reinforcement zone, the load on the anchor rod is regarded as the uniform load distributed on the edge of the reinforcement zone, and the displacement of the chamber under the stress of the ground and the load of the anchor rod respectively is obtained. The end of the joint displacement is the deformation of the reinforcement zone, so you can determine the bolt load as a function of the surrounding rock parameters.