Test device and method for simulating stratum displacement caused by double-circle shield tunnel construction

The invention relates to a test device and method for simulating stratum displacement caused by double-circle shield tunnel construction, and belongs to the field of civil engineering tests. The device comprises a transparent model box filled with transparent soil, a double-circle tunnel model, a tractor, laser emitters and cameras. The double-circle tunnel model horizontally penetrates through the transparent model box and comprises a transparent double-circle supporting column and a transparent double-circle pipe which are sleeved with each other and can slide relatively, and the transparentdouble-circle supporting column and the transparent double-circle pipe which are located in the transparent model box are embedded into transparent soil. The tractor is located outside the transparent model box and connected with the transparent double-circular pipe so as to discontinuously pull the transparent double-circular pipe to be horizontally drawn. The two laser emitters and the two cameras are arranged at the periphery of the transparent model box in a manner of corresponding to the transparent double-circular pipe, one laser emitter and one camera are arranged at the two sides of the drawing direction of the transparent double-circular pipe respectively, and the other laser emitter and the other camera are arranged at the two sides of the direction vertical to the drawing direction of the transparent double-circular pipe respectively. Operation is convenient, the structure is simple, and the simulation effect is visual and accurate.