In the subway tunnel-ground fissures dynamic interaction model test

point load loading way is proposed.In order to determine the loading plan of the model test

the point loads and moving loads

the two kinds of loads are used in the ground fissures-orthogonal U-shaped tunnel dynamic interaction numerical model.Through the two loading modes

the maximal vertical displacement of the arch bottom soil

soil maximum acceleration distribution

soil acceleration time history and acceleration time history of the lining are analyzed and compared.It is concluded that

under the two loading modes

the maximal vertical displacement at the bottom of the arch

the soil acceleration distribution

soil acceleration time history and the acceleration time history of the lining have similar distribution regularity.Thus it is illustrated that in the model test the point load loading method can be used in place of the moving load.It provides the basis for the model test.