Foundation pit steel support axial force monitoring device based on deformation measurement

The utility model relates to a foundation pit steel support axial force monitoring device based on deformation measurement. The utility model aims to provide a foundation pit steel support axial forcemonitoring device which is simple in structure, convenient to install, fast to operate, low in manufacturing cost and based on deformation measurement. According to the technical scheme, the foundation pit steel support axial force monitoring device based on deformation measurement is characterized in that the foundation pit steel support axial force monitoring device is provided with two fixingpieces installed at different positions in the axial direction of a steel support, and the two fixing pieces are provided with laser convergence instruments and alignment reflectors which are in one-to-one correspondence; at the beginning, the laser point of the laser convergence instrument on one fixing piece irradiates and aligns to the center position of the corresponding alignment reflector onthe other fixing piece. Th