Inspection Test of a Tunnel with an Inspection Vehicle for Tunnel Lining Concrete

2019 ◽  
Vol 31 (6) ◽  
pp. 762-771 ◽  
Author(s):  
Satoru Nakamura ◽  
Atsushi Yamashita ◽  
Fumihiro Inoue ◽  
Daisuke Inoue ◽  
Yusuke Takahashi ◽  
...  
Keyword(s):  
Visual Inspection ◽  
New Technology ◽  
Tunnel Lining ◽  
Road Tunnel ◽  
Traffic Regulation ◽  
Tunnel Inspection ◽  
Infrastructure Maintenance ◽  
Periodic Inspections ◽  
Vast Area

Users of bridges and tunnels are generally concerned about the aging of these structures. Periodic inspections are necessary to keep old bridges and tunnels healthy. Inspection engineers must approach the inspection points as close as possible by mobile elevating of the work platform for close visual inspection of lining concrete. The inspection of a road tunnel particularly requires traffic regulation. Furthermore, it takes much time to perform visual inspection and hammering test for the vast area. Moreover, the inspection results have variations by inspectors. We propose an “Inspection Vehicle” for inspection of tunnel lining concrete by a new technology for infrastructure maintenance. This study reports the finding on element technology of an inspection vehicle and applies a tunnel inspection test.

The Slabbing Mechanics Analysis of the Tunnel Lining

2011 ◽  
Vol 243-249 ◽  
pp. 3530-3537
Author(s):  
Zu Song Wu ◽  
Guang Qi Chen ◽  
Kou Ki Zen ◽  
Xin Rong Liu
Keyword(s):  
Surrounding Rock ◽  
Tunnel Lining ◽  
The Self ◽  
Road Tunnel ◽  
The Road ◽  
Mechanics Analysis ◽  
The Stability

When the road tunnel is excavated, the multi lining is used to being applied. In order to keep the surrounding rock stabilize and arouse the self-stability of the surrounding rock, building the first support is essential. But the slabbing often occurs near the spring line on the surface of the first lining, and because the slabbling is a common failing and not attracted our most attentions, it will develop to the crack and threaten the stability of the structure finally. This paper uses the line elastic method to analyze the mechanics that causes this slabbing phenomenon via the interaction between the surrounding rock and the first lining, and suggests the measure that escape the slabbing.

Robotic inspection of ship hull surfaces using a magnetic crawler and a monocular camera

Sensor Review ◽  
2017 ◽  
Vol 37 (4) ◽  
pp. 425-435 ◽  
Author(s):  
Annalisa Milella ◽  
Rosalia Maglietta ◽  
Massimo Caccia ◽  
Gabriele Bruzzone
Keyword(s):  
Visual Inspection ◽  
Low Cost ◽  
New Technology ◽  
Experimental Tests ◽  
Ship Hull ◽  
Inspection System ◽  
Content Type ◽  
Monocular Camera ◽  
Mosaic Image ◽  
Automatic Visual Inspection

Purpose Periodic inspection of large tonnage vessels is critical to assess integrity and prevent structural failures that could have catastrophic consequences for people and the environment. Currently, inspection operations are undertaken by human surveyors, often in extreme conditions. This paper aims to present an innovative system for the automatic visual inspection of ship hull surfaces, using a magnetic autonomous robotic crawler (MARC) equipped with a low-cost monocular camera. Design/methodology/approach MARC is provided with magnetic tracks that make it able to climb along the vertical walls of a vessel while acquiring close-up images of the traversed surfaces. A homography-based structure-from-motion algorithm is developed to build a mosaic image and also produce a metric representation of the inspected areas. To overcome low resolution and perspective distortion problems in far field due to the tilted and low camera position, a “near to far” strategy is implemented, which incrementally generates an overhead view of the surface, as long as it is traversed by the robot. Findings This paper demonstrates the use of an innovative robotic inspection system for automatic visual inspection of vessels. It presents and validates through experimental tests a mosaicking strategy to build a global view of the structure under inspection. The use of the mosaic image as input to an automatic corrosion detector is also demonstrated. Practical implications This paper may help to automate the inspection process, making it feasible to collect images from places otherwise difficult or impossible to reach for humans and automatically detect defects, such as corroded areas. Originality/value This paper provides a useful step towards the development of a new technology for automatic visual inspection of large tonnage ships.

scholarly journals Application of the BIM Method in the Management of the Maintenance in Port Infrastructures

2020 ◽  
Vol 8 (12) ◽  
pp. 981
Author(s):  
Paola Valdepeñas ◽  
María Dolores Esteban Pérez ◽  
Carlos Henche ◽  
Raúl Rodríguez-Escribano ◽  
Gonzalo Fernández ◽  
...  
Keyword(s):  
New Technology ◽  
Three Dimensional ◽  
Information Modeling ◽  
Public Infrastructure ◽  
Step Method ◽  
Building Information ◽  
Infrastructure Maintenance ◽  
Port Infrastructure ◽  
Source Of Information ◽  
New Infrastructure

This work represents a paradigm shift in the approach to manage port infrastructure maintenance where the use of the building information modeling (BIM) method is very scarce, and it is now beginning. The new infrastructure conservation management method proposed in this manuscript combines traditional methods with new technology, covering the gap of the implementation of BIM in port maintenance. This new technology is the BIM method, and its use is already mandatory in public infrastructure projects in some countries. In this work, the BIM method is applied to the management of the conservation of port infrastructures to show the benefits that can be obtained using it. After the analysis of the state of the art in the conservation of port infrastructures, two of the main maritime works of the Outer Port of A Coruña were modeled in Revit. This as-built model serves as an inventory model and forms a large database of all the information regarding the conservation of the structures. In this way, all the data on the conservation of the port’s infrastructures are concentrated in a single source of information in which, in addition, there is a three-dimensional and georeferenced representation of the port in question. The main finding of this work is the development of a step by step method to implement BIM philosophy in port maintenance, highlighting the positive and negative points detected during the validation of the method in a real case, detecting future improvement research lines. Although BIM has a lot of advantages and possibilities just now, some improvements are still necessary.

scholarly journals Infrastructure Stakeholders’ Perspective in Development and Implementation of New Structural Health Monitoring (SHM) Technologies for Maintenance and Management of Transportation Infrastructure

2019 ◽  
Vol 271 ◽  
pp. 01010 ◽  
Author(s):  
Dilendra Maharjan ◽  
Marlon Agüero ◽  
Chris Lippitt ◽  
Fernando Moreu
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
New Technologies ◽  
Low Cost ◽  
New Technology ◽  
Research Progress ◽  
Bottom Line ◽  
Structural Health ◽  
Economic Output ◽  
Infrastructure Maintenance

Infrastructure is the backbone of the US economy and a necessary input to every economic output [1]. The cost of infrastructure maintenance and management demands significant expense for government and private companies. Infrastructure owners want to increase efficiency and improve their bottom-line from existing infrastructure rather than building new ones [2]. One of the significant challenges for the engineering community has been adopting new technologies such as low-cost wireless smart sensors, augmented reality, Unmanned Aerial System (UAS)-based Structural Health Monitoring (SHM). To receive first-hand insight from infrastructure owners, industry professionals and researchers, a workshop entitled ‘Infrastructure, Maintenance and Management Using New Technology’ was conducted in Fort Worth, Texas. In this paper the findings from the workshop are discussed. Stakeholders highlighted safety of the bridge inspectors as the priority in the maintenance and management work. Based on the findings of this workshop it now clear that adopting new technologies leads to higher safety for field inspectors. Key aspects include importance of new technologies for obtaining actionable data for maintenance and management, owner’s perspectives on development of future technologies, current research progress and challenges faced by infrastructure industry in implementing new technologies are presented.

Research and Development on Robotic Technologies for Infrastructure Maintenance

2019 ◽  
Vol 31 (6) ◽  
pp. 744-751
Author(s):  
Keiji Nagatani ◽  
Yozo Fujino ◽  
◽  
Keyword(s):  
Research And Development ◽  
Natural Disasters ◽  
Local Governments ◽  
Disaster Response ◽  
New Technologies ◽  
Civil Infrastructure ◽  
Development Programs ◽  
Traffic Regulation ◽  
Infrastructure Maintenance ◽  
Robotic Technologies

Construction of infrastructures, such as bridges and tunnels, has increased significantly in Japan in the past 50 years. Most of the civil infrastructure is now aging rapidly. Basic infrastructure maintenance and management require proper repairing and reinforcement, for which periodic inspections are indispensable. Inspection of civil infrastructure, however, requires a large amount of workforce for traffic regulation and accessing difficult-to-reach locations. Occupational safety is also an important issue that cannot be ignored. Furthermore, technologies related to emergency responses after the occurrence of natural disasters are important, especially with the increasing number of natural disasters recently. Executing a safe and quick disaster response action is very challenging. To meet the above problems, “Infrastructure Maintenance, Renovation and Management” was established in the Cross-ministerial Strategic Innovation Promotion Program (SIP). Research and development programs for infrastructure management systems using new technologies had been conducted since 2014. In this paper, the research and development programs related to robotic technologies are described. Specifically, robotic technologies for bridge inspection, tunnel inspection, and disaster responses are introduced. In addition, the scheme of the SIP regional bases that facilitates the availability of the developed technologies to local governments is also introduced.

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