Real-time monitoring and evaluating method for stress state of concrete-filled steel tube arch bridge in pouring process

The invention discloses a real-time monitoring and evaluating method for the stress state of a concrete-filled steel tube arch bridge in the pouring process, which is applied to the technical field of bridge engineering and comprises the following steps: identifying environmental background points in a full-bridge RGB three-dimensional matrix according to a value range limited between the maximum value and the minimum value of RGB in a local RGB three-dimensional matrix of a steel tube; environment background temperature points in the temperature information matrix are marked, poured concrete points are identified by subtracting whether the temperature difference value in the arch crown steel pipe temperature multiple unit matrix conforms to a preset temperature difference range or not, and horizontal coordinates of center pixels of poured liquid levels of a left half arch and a right half arch under a rectangular coordinate system are obtained; the whole arch rib to be perfused is equally divided into 2n par