Rigidity coefficient calculation method considering uneven distribution of surface shear stress of anchoring section

The invention discloses a stiffness coefficient calculation method considering non-uniform distribution of surface shear stress of an anchoring section. The method comprises the following steps: establishing a plane coordinate system; calculating the elongation of the free section; calculating shear stress of the anchoring section; the elongation of the anchoring section is calculated; establishing a space rectangular coordinate system; calculating the displacement of the far end of the anchoring section; calculating the total displacement of the anchor head; and determining the rigidity coefficient of the anchor rod. A common tension type anchor rod is taken as an example, the actual shear stress is attenuated from an anchoring section to a tail end curve, and from the action mechanism of the anchor rod, through the interaction of an anchoring body and a rock-soil body, the tension of a structure is transmitted by depending on the shear strength between the anchoring body and a surrounding soil body; meanwhi