The invention relates to a soil
pressure balance type tunnel shield analog experiment
system, a rectangular soil
coelom with the upper part provided with an opening is internally provided with a
shield machine model and filled with a simulated soil body, the axle wire of the
shield machine model is overlapped with that of the soil
coelom; the upper surface of the simulated soil body is covered with a layer of concrete
cushion the upper surface of which is connected with a horizontal loading beam by more than two soil pressure jacks, the horizontal loading beam is connected with the bottom of the soil
coelom by an anchor
rope; and the simulated soil body is also internally embedded with a soil pressure box, a
grating fiber optical sensor and a displacement meter, wherein, the soil pressure box, the
grating fiber optical sensor and the displacement meter are all electrically connected with a
data acquisition and
processing device. The
system can simulate the influence of shield
tunnel construction between subways of cities on the stratum and surrounding environment more conveniently, actually and effectively, and provide more actual and accurate experimental data for
tunnel construction and design so as to guarantee the high-efficiency and safety of the shield
tunnel construction of cities.