METHOD FOR MONITORING THE TECHNICAL CONDITION OF THE TUNNEL LINING USING THE SEISMOACOUSTIC METHOD Russian patent published in 2023 - IPC G01M7/00 

FIELD: construction.

SUBSTANCE: invention relates to the field of construction and operation of transport tunnels, as well as methods for diagnosing and monitoring their condition during operation. The method for monitoring the technical condition of the tunnel lining using the seismoacoustic method consists in identifying defects in the building structures of the tunnel based on recording the propagation parameters of seismic waves and includes conditional partitioning of the surface of the tunnel lining with the installation of seismic sensors on them into sections within which subsequent operations of the seismoacoustic method are carried out determining the quality of the building structure and contact with the surrounding soil, excitation of mechanical vibrations of the building structure of the tunnel, measuring their parameters at a controlled point on the surface and identifying zones with a gradient of measured parameters within the selected area, moreover, vibrations are excited by a non-destructive method and measurements are carried out on one side of the building structure using seismic sensors on each conditional section of the tunnel. As a source of excitation of mechanical vibrations in the building structure of the tunnel, a passing railway train is used, which generates vibrational vibrations on the railway tracks and the tunnel lining. The state of the tunnel lining is monitored using the processing of vibration accelerograms by the method for spectral analysis, which makes it possible to determine the frequency and amplitude composition of vibration vibrations, and the graphical representation of the vibration signal in the form of spectrograms is used to control changes in the stress-strain state in the "lining - rock mass" system. Registration of oscillations is carried out in a continuous mode with reference to time at the location of the seismic sensor and the near zone of the lining space in each conditional section of the tunnel, and the process of monitoring the state of the tunnel lining is carried out automatically without human intervention.

EFFECT: ensuring the control of the technical condition of the building structures of the tunnel using the seismoacoustic method without stopping the operation of the tunnel, as well as increasing the speed of carrying out and reducing the labor intensity of work to control the technical condition of the building structures of the tunnel.

1 cl, 3 dwg