The invention discloses a thick loose rock-soil layer
bottom water injection
sedimentation deformation
analog device and method. The thick loose rock-soil layer
bottom water injection
sedimentation deformation
analog device is characterized in that the two ends of a model
barrel of the device are connected to flanges, and the two sides of the model
barrel are connected to a water drainage
flange and a pressure measuring
pipe; a constant-pressure water
injection pump is connected to a
water source, the other end of the constant-pressure water
injection pump is connected to a flowmeter, the other end of the flowmeter is connected to a water injection
pipe which is connected to a water injection floral
pipe in the model
barrel, the bottom of a cavity is connected to a perforated plate, an optical cable is connected to a
fiber grating sensor, and the other end of the optical cable is connected to a
fiber grating demodulator, a computer and remote
transmission equipment. The
sedimentation analog method comprises the steps that the constant-pressure water
injection pump is used for injecting water so as to cause the sedimentation and the deformation of a thick loose rock-soil layer, a
light source in the demodulator is applied to the sensor, the demodulator is used for converting an optical
signal returned by the sensor into a
wavelength value and sending the
wavelength value to the computer, the
wavelength drift distance is calculated, and the wavelength value is converted into an
internal stress value of the thick loose rock-soil layer. The thick loose rock-soil layer
bottom water injection sedimentation deformation
analog device has the advantages of being complete in monitoring, high in testing flexibility, repeated in manufacturing and wide in suitability for the research of a sedimentation problem of
coal mines, foundation ditches, side slope roads and railways, and the
wireless data transmission can be realized.