Efficient Detection of Apparent Defects in Subway Tunnel Linings ...

Research on Detection Method for Tunnel Lining Defects Based on ...

Ground penetrating radar (GPR) is an efficient, anti- interference, and highly penetrating non-destructive testing tool that provides more ...

Automatic Sensing and Detection for Subway Tunnel Pathologies

Subway tunnels often suffer from surface pathologies such as cracks, corrosion, fractures, peeling, water and sand infiltration, and sudden hazards caused by ...

intelligent detection of concrete apparent defects based on a deep ...

performance of concrete structures; therefore, apparent defects in concrete need to be efficiently and intelligently detected. Compared with the traditional ...

Enhanced Water Leakage Detection in Shield Tunnels Based on ...

This can effectively improve the automation and intelligence level of tunnel inspection. Based on the tunnel lining image acquisition, there are.

A Method and Device for Tunnel Defect Detection Based on Image ...

Acoustic emission testing utilizes the phenomenon of material acoustic emissions to detect defects in tunnel lining concrete such as cracks.

2 Literature Review | Practices for Controlling Tunnel Leaks

The first step toward effective remediation of water infiltration is to identify the source of the water. In tunnels constructed using cut-and-cover measures, ...

A crack detection system of subway tunnel based on image processing

For the images of crack defects of subway tunnel, traditional image processing algorithms is hardly effective for dealing with problems ...

Fast detection algorithm for cracks on tunnel linings based on deep ...

The semantic segmentation algorithm directly separates the defect pixels from the background, and the defects are visually displayed in the predicted images. To ...

Tunnel lining detection and retrofitting - White Rose Research Online

detect and evaluate the defects in the linings and adopt effective means of maintenance and ... Wang, Inspection equipment study for subway tunnel defects.

Research on the Present Situation and Development ... - IOPscience

current situation and existing problems of subway tunnel detection comprehensively, puts ... Tunnel lining disease detection device based on infrared.

Automatic detection method of tunnel lining multi‐defects via an ...

The established TLDDP can realize the high‐precision and automatic detection of multiple tunnel lining defects under different lighting and ...

Towards Automated Inspections of Tunnels: A Review of Optical ...

concrete tunnel linings and damage that can be detected ... Inspection equipment study for subway tunnel defects by grey-scale image processing.

Tunnel Lining Multi-Defect Detection Based on an Improved You ...

They found that the image enhancement algorithm effectively enhanced the net- work's defect recognition accuracy. Zhou et al. [22] improved the YOLOv4 network ...

Improved transient electromagnetic radar method of void ...

A field application was carried out in Haobei Tunnel of Beijing Metro Line 6. By comparing the test results of TER images with the sampling ...

Recognition Method of Tunnel Lining Defects Based on Deep ...

Common defects include imperfect lining, voids, cracks, and water seepage. If these defects cannot be detected in time, they will damage the ...

Detection system of inner lining cracks for the Athens Metro

The typical defects that are recognizable in concrete tunnels are cracks, spalling and leakage. If the tunnel walls have been covered by a ...

Non-contact Testing of Large Concrete Structures for Voids and ...

Abstract. Concrete is the most used construction material for civil engineering structures, as it is reliable, cost-efficient, and long lasting.

Arbitrarily-oriented tunnel lining defects detection from Ground ...

utilized to detect subsurface abnormal objects using GPR images [10-13], resulting in effective detection performance. However,. 21 the afore-mentioned ...

Application study of NDT technology in bridge and tunnel

In terms of the tunnel engineering, the lining diseases, as a more common form of the tunnel diseases, will seriously affect the stability and ...

Rapid automatic inspection system for tunnel lining based on a mobile

... detection of visible and invisible defects of tunnel structure respectively. ... The fast record and assessment of defects greatly improve the efficiency ...