Refined active reinforcement method and device for reverse stress flow

The invention discloses a refined active reinforcement method and device for a reverse stress flow, and belongs to the technical field of structural engineering, and the method comprises the following steps: obtaining a principal stress vector of a beam structure; arranging external prestressing measures of reverse stress flow in a targeted manner according to the principal stress vector; the external prestressing measure of the reverse stress flow comprises an anchoring device and a scattered beam type external cable; the distribution position, the direction and the tensioning force of the scattered external cables are reversely arranged according to the distribution position, the direction and the size of principal stress vectors, the anchoring devices are arranged on a beam structure in a scattered mode, and the scattered external cables are connected with the anchoring devices. According to the method, reversely distributed external prestress measures are specifically designed, the risk of cracking of bea