System and method for testing jacking force of pipe jacking by pipe-roofing method

The invention discloses a pipe-roofing-method pipe-jacking pushing force test system and method.The system comprises a model box, a plurality of entrances and exits for pipe-jacking models to enter and exit are formed in a pair of side walls of the model box, an air bag is formed on the outer side of a PVC hard pipe, and the PVC hard pipe and the air bag jointly form the pipe-jacking model; a pipe jacking model penetrates through the inlet and outlet, the two ends of the pipe jacking model extend out of the model box, the model box is filled with soil and covers the pipe jacking model, a soil pressure sensor is arranged in the portion, on the upper side of the PVC hard pipe, of the soil, an LVDT earth surface deformation sensor is arranged in the portion, on the upper side of the soil pressure sensor, of the soil, and the LVDT earth surface deformation sensor is arranged in the portion, on the upper side of the soil pressure sensor, of the soil. A loading device is arranged at one end corresponding to the PVC