Stress movement monitoring and early warning device for deep foundation pit supporting structure

The invention relates to the technical field of monitoring and early warning devices, and provides a stress movement monitoring and early warning device for a deep foundation pit supporting structure. The stress movement monitoring and early warning device for the deep foundation pit supporting structure comprises a supporting and fixing mechanism, an alarm device and a triggering mechanism. The supporting and fixing mechanism comprises an arc-shaped vertical plate and a fixing assembly, the fixing assembly is installed at the top of the arc-shaped vertical plate, a strip-shaped groove hole is formed in the side face of the arc-shaped vertical plate, the alarm device is installed on the outer side of the arc-shaped vertical plate, and the multiple sets of triggering mechanisms are installed on the outer side of the arc-shaped vertical plate. The ends of a plurality of preset guide rods make contact with different positions of the outer wall of the deep foundation pit supporting stand column, when the supporti