Mechanical device for automatically detecting construction quality of shield tunnel linings and detection method

Abstract

The invention provides a mechanical device for automatically detecting the construction quality of shield tunnel linings and a detection method. The device comprises a detection trolley, a control table, a longitudinal track, a longitudinal moving device, an annular track and an annular moving detection device. The method comprises the steps that the electromagnetic wave speed and center frequency of a radar antenna are determined; the mechanical device and a shield tunneling machine are connected; when the mechanical device moves to the part below a first annular lining of a shield tunnel, the longitudinal moving device is adjusted to make the annular moving detection device located under the central line of the cross section of the first annular lining; a detection line of the shield tunnel lining is determined; proper fitting of the radar antenna in the mechanical device and the surface of the first annular lining is determined; the quality of the first annular lining of the shield tunnel is detected; along with constant advancing of the detection trolley in the mechanical device, the annular moving detection device is made to be located at the central axis of the cross section of a next annular lining by adjusting the longitudinal moving device, and the subsequent lining quality detection work can be completed by repeating the fifth step and the sixth step in sequence.

Description

technical field [0001] The invention relates to the field of detection of the lining construction quality of a shield tunnel, in particular to a mechanical device and a detection method for automatically detecting the construction quality of a shield tunnel lining. Background technique [0002] At present, the quality inspection of shield tunnel lining is mainly ground radar inspection. The basic principle of geological radar detection is to use high-frequency electromagnetic waves in the form of broadband short pulses to send signals underground through the transmitting antenna on the ground, and the receiving antenna receives the part of the electromagnetic wave reflection signal that is reflected back to the ground by the stratum interface or the target body. Then the computer analyzes the time-frequency characteristics and amplitude characteristics of the electromagnetic wave reflection signal to determine the position, geometry and structure of the formation or target. ...

AI Technical Summary

Problems solved by technology

"This device uses a telescopic frame and a lifting rod instead of manual lifting operations. When inspecting the left and right side walls and waist arches, the angle of the radar antenna is changed by adjusting the lifting rod to fit the lining surface. However, the bottom end of the lifting rod is in contact with the lining surface. The support table is fixedly connected. On the premise that the radar antenna is not retractable, if the radar antenna is to fit the lining, the four lifting rods can only be bent inward. After multiple inspections, the verticality and verticality of the lifting rods cannot be guaranteed. Its curvature directly affects the detection results; at the same time, the angle settings of the four lifting rods are still manually adjusted, and human errors cannot be avoided; in addition, the environment of the shield tunnel is not suitable for the entry and exit operations of mobile vehicles

Therefore, the method proposed in the above patent is difficult to guarantee the accuracy of the detection results of the radar antenna, and it is difficult to apply to the quality detection of the shield tunnel lining

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