Full-face vehicular detection method for railway tunnel lining and device

Abstract

A full-face vehicular detection method for a railway tunnel lining and a device aim to avoid collision of ground penetrating radar antennas with an overhead line system and a support of the overhead line system, the detection speed is a normal running speed of a train, the antennas in full-face detection are not interfered with each other, automatic positioning is realized during detection, only ground penetrating radar signals in a tunnel need to be acquired, and a penetrating radar signal processing and analyzing method in tunnel detection is modified. The vehicular device comprises a six-channel high-speed scanning penetrating radar, a positioning portion, a laser ranging portion and data acquisition and processing software. The pulse repetition frequency of the ground penetrating radar is 3MHz, the pulse repetition frequency of each channel is 500kHz, and the scanning rate is 976scan / s. The ground penetrating radar is provided with TEM (transverse electric and magnetic field) short-horn air coupled antennas, each group of antennas realizes a double-transmission and single-receiving function, and the center frequency of the antennas is 300MHz. The ground penetrating radar antennas are mounted outside passenger train connectors, radiation surfaces of the antennas respectively face to an arch crown, arch springing and side walls, and the full-face vehicular detection method and the device are used for automatically detecting to exam the railway tunnel lining.

Description

technical field [0001] The invention belongs to the technical field of railway engineering system detection, in particular to a special device for tunnel lining quality and disease detection. Background technique [0002] According to incomplete statistics, by the end of 2009, the total length of railway tunnels built in my country had exceeded 7,000km, and about 2,500 railway tunnels were under construction, with a total length of about 4,600km. By 2020, 5,000 tunnels were planned to be constructed, with a length of more than 9,000km. The total amount of railway tunnel construction in my country has far exceeded that of other countries in the world. The method of testing the lining quality of new railway tunnels in my country is to use a hand-held ground-penetrating radar antenna close to the tunnel wall to detect the lining and integrity. Due to the high cost, the specification only requires sampling inspection of 5%, that is to say, the quality of 95% of the tunnel lining...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a vehicle-mounted detection method and device for the full-section lining of railway tunnels, aiming at the conditions of my country's existing railway tunnels and the busy situation of my country's railways, avoiding the current manual method of existing railway tunnels and the method of foreign hydraulic systems supporting ground-penetrating radar antennas The detection has the disadvantage of slowing down the detection speed due to the blockage of the catenary structure. A vehicle-mounted ground penetrating radar long-distance measurement method for railway tunnel lining in the electrified section of the existing line is proposed. Under the condition of no power failure, the detection vehicle is hung at the tail of the train. Without increasing the number of trains and without affecting normal railway transportation, the tunnel lining is inspected at the normal running speed of the train to realize the general survey of railway tunnel diseases

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