Tunnel structure damage identification device based on vibration response test

Abstract

The invention provides a tunnel structure damage identification device based on a vibration response test. A vibration pulse signal is excited by a pulse excitation device, structural vibration response is collected by a high-precision acceleration sensor, and an extraction structure transmits function information to identify the tunnel structure damage (namely, change of structural dynamic properties); the damage identification device mainly comprises acceleration sensors, the pulse excitation device, a central control computer, a signal collector, a horizontal telescopic arm and a matched circuit; an operator controls the development length of the horizontal telescopic arm through an operation instruction to determine a detection range. The acceleration sensors on both ends of the horizontal telescopic arm are fixed on the surface of the structure, the pulse excitation device is controlled to apply pulse excitation on the structure to collect the acceleration response of the structure, and the central control computer is used for carrying out the structure damage identification through tunnel structure damage identification system software.

Description

technical field [0001] The invention belongs to the field of tunnel structure damage detection and identification equipment, in particular to a tunnel structure damage identification device based on vibration response test. Background technique [0002] In recent years, indoor traffic congestion in large and medium-sized cities has been serious. In order to meet people's daily travel requirements, urban public transportation construction has achieved rapid development, especially the convenient and fast subway transportation. Large-scale construction of subway tunnels has been carried out in many cities in China. In particular, large cities such as Beijing and Shanghai have built hundreds of kilometers of subway tunnels, which carry the daily travel of millions of citizens. At present, Shanghai has become the longest operating subway tunnel in the world. city ​​of. However, because tunnels are semi-concealed projects built in underground rock-soil media, and my country’s su...

AI Technical Summary

Problems solved by technology

However, because tunnels are semi-concealed projects built in underground rock-soil media, and my country’s subway tunnels were built in different periods, under different geological conditions and at different technical levels, after years of operation, many tunnels have suffered from various damages and diseases. The specific manifestations are: uneven settlement, cracks, water leakage, wrong platform, falling blocks, voids behind segments, etc. The hidden dangers formed by these diseases pose a certain threat to the safety of tunnel operation

[0003] If the detection of different types of structural damage requires the use of various types of technologies and instruments, as well as large-scale manual inspection records, etc., a large amount of manpower and material resources are required, the degree of danger is high, and the identification and detection of damage has a certain lag. Timely detection of damage inside the tunnel structure, the test results are highly subjective, different test personnel will get different test results, and most of the safety evaluation of the tunnel lining structure is a qualitative description

If multiple types of sensor equipment are densely arranged, and key monitoring locations cannot be determined, it will cause a lot of waste of equipment

Images