Topic 43. Advancement of inspection, repair and rehabilitation techniques / technologies
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IP0357 - A method for detecting damage areas in concrete slabs using hammering sounds coupled with deep learning
Hammering sound has been widely used to detect internal damage in concrete slabs. Traditionally, a skilled inspector is required to listen and distinguish the fine differences in sound types. Available sound inspection systems usually use high-performance sound recording sensors and require a quiet environment. However, a noise-free environment cannot be established at a construction site where noises [...]
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IP0687 - Boosting Infrastructure Resilience and Security: the ANAS “Virtualization of Infrastructures” Program
Infrastructure inspection, repair and rehabilitation pose relevant challenges for road operators. In fact, well-maintained and in step with innovation buildings and infrastructures is essential to guarantee efficiency and safety. In such a context, the introduction and experimentation of innovative monitoring tools is crucial to better predict deteriorations and eventually carry out maintenance and [...]
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IP0588 - Detection of Wire Breaks in Stay Cable and External Prestressed Cable using a Magnetic Rope Testing Device
Cable-stayed and pre-stressed cables using parallel multi-strands technology are main components for reliability and durability of modern bridges. In order to perform nondestructive testing of parallel multi-strands cables the Cerema has experimented the magnetic rope testing technology from ropeways to develop a non-destructive testing technic for these cables. The magnetic rope testing allows high [...]
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IP0210 - Development of asphalt pavement with waterproof function equivalent to Gussasphalt
Bridges are bottlenecks of road networks, and traffic restrictions due to maintenance not only cause huge economic loss, but also may isolate the area if traffic is closed. In particular, the deck of a bridge is affected by traffic load, and if water permeates the deck, damage will proceed at an early stage, so that it is important to waterproof the bridge surface. General waterproofing methods for [...]
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IP0249 - Development of high durable precast PC deck with ultra-high-strength fiber-reinforced concrete layer
About 40% of the total length of expressway bridges has been in service for over 30 years in Japan. Therefore, NEXCO East has been carrying out an expressway renewal project, which started in 2015, and conducts radical repairs of dilapidated expressway bridges including reconstruction to ensure safety for road users. In particular, the deteriorated RC floor slabs of steel plate girder bridge have [...]
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IP0179 - Evaluation of Cables on Ampera Bridge Tower with Vibration Technique
This paper presents a special inspection of twenty hanger cables of the historic bascule bridge, the Ampera Bridge, with the objective of determining whether or not the hanger cables have carried loads. Ampera Bridge is a structural and architectural landmark in South Sumatra, Indonesia, and has become a historic structure. The bridge construction began in 1962 and was finished in 1965. The bridge [...]
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IP0745 - Experimental Study on the Development of Inspection Methods for Bridge Scour
In recent years, natural disasters have become more severe and frequent, and road bridges have suffered scour damage, resulting in long-term road closures and isolation of communities, which have had a significant impact on society. In Japan, periodic inspections of road bridges are conducted once every five years in accordance with the Guidelines for Periodic Inspection of Road Bridges, and visual [...]
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IP0486 - Extending the useful life of a steel structure with fatigue cracking using experimental measures and finite element analyses
Québec’s road network was massively developed in the years 1960–1970. Many steel bridges built in these years now have cracking problems that can cause the rupture of a component and possibly ruin the structure. These bridges were sometimes unsuccessfully repaired. Back then, design rules allowed connection details that are no longer accepted nowadays, and these details cannot always be changed [...]
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IP0789 - Guidance on the assessment of masonry arch bridges
Approaching half of all bridge spans on the UK road and rail networks are of masonry arch construction; the situation is similar in several western European countries. However, the behaviour of these long-lived structures is not well understood. Thus, research on the behaviour of masonry arch structures was recently undertaken by the Universities of Sheffield and Salford, funded by the UK government [...]
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IP0561 - Manes Bridge - Complex Diagnostics and Assessment
Manes bridge over Vltava river is very important transport connection in the center of Prague. The age of this historically bridge is more then 100 years and there were doubts about its reliability. Therefore manager of the bridge decided about detailed diagnostics. Complex survey, diagnostics, monitoring and loading tests were provided last two years. The results and final assesssment will be presented. [...]
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IP0627 - Mechanical properties and microscopic analysis of CRM concrete modified by nano-sio2
In this paper, a rapid repair material of CRM concrete modified by nano-SiO2 used in expressway bridge expansion joints is developed. Firstly, based on the existing research results, the mix proportion design of CRM concrete modified by nano-SiO2 is proposed. Then, the strengthening rules of different contents of SiO2 on the compressive strength, flexural strength, and impact strength of modified [...]
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IP0148 - Multiple 3D surveying method on Expressway Bridge Renewal Project
In recent years, bridge renewal projects and four-lane expansion projects have been underway throughout Japanese expressways. This usually requires traffic control for long period and scaffolding on the underside of the bridges, which can have a significant traffic impact on drives and a long number of working days. Therefore, it is necessary to survey the shape of the existing structures precisely [...]
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IP0184 - Reformation of Bridge Slab Maintenance: Development of Specialized Waterproofing Materials for Manual Pavement Work
As the expressway network is aged, the amount of repair work is increased dramatically. The Kuwana office is one of the busiest maintenance offices, and has such duties under heavy traffics in Japan. Many of the bridges facing severe deteriorations of concrete slab produce numerous numbers of potholes on pavement surfaces. Although a lot of effort has been conducted every day, it could not be possible [...]
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IP0665 - Rehabilitation of Barrandovský Bridge over the Vltava River in Prague
Barrandovský bridge across the Vltava river is a point of the highest traffic intensity not only within the Prague road system, but also within the entire highway and road network in the Czech Republic. This mighty structure is an example of late brutalist architecture from the 80‘s. Two parallel structures on solely one set of piers inside the river accommodate 4 traffic lanes in each direction. [...]
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IP0302 - Smart Bridges in Germany
Innovative methods for monitoring bridges are on the rise. In Germany, too, the topic of Smart Bridges has been addressed. It is equipped with measuring systems that provide data that must be transmitted, stored and analysed. They are then used to gain knowledge and make decisions. In Germany, a Smart Bridge has been tested since 2015 in a five-year pilot project of the Federal Highway Research Institute [...]
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IP0543 - Static and dynamic testing of bridges: use of T-InSAR technology for measuring deformation and identifying modal analysis parameters.
The technology of ground-based radar interferometry (T-InSAR) can be used to determination of deformations of structures with accuracy up to 0.001 mm in real time using a contactless technology. It is also possible to measure the main vibration frequency up to 200 Hz. Deformations can be determined simultaneously in multiple point of the structure with range resolution at least of 0.75 m. Compared [...]
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IP0139 - Structural monitoring and evaluation of the Rio Papaloapan cable-stayed bridge during the rehabilitation of the upper anchoring elements
The Rio Papaloapan Bridge (RPB) is a cable-stayed bridge located in the State of Veracruz, Mexico. The bridge consists of a prestressed concrete deck supported by 112 cables distributed in 8 semi-harps. Importance of the bridge, within the Federal Highway Network of Mexico, is because it is located on one of the main commercial and communication routes to the southeast of the country; though, operation [...]
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IP0743 - Suggestion for Preventive Maintenance of Road Bridges Based on the Estimation of Scour Damage Factors
In recent years, natural disasters have become more severe and frequent in Japan. Typhoons and torrential rains have caused scour damage to many road bridges, resulting in social problems such as long-term road closures and isolation of villages. Against the background of these social problems, the Ministry of Land, Infrastructure, Transport, and Tourism (MLIT) has announced a policy aimed at achieving [...]
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IP0556 - The First Large-Scale Renewal Work on the Metropolitan Expressway
Route No.1 Haneda Line of the Metropolitan Expressway experiences the first large-scale renewal work. The Metropolitan Expressway is an urban expressway that extends approximately 327km through Tokyo as the Japanese capital’s main distribution artery. The daily traffic volume reaches approximately 1,000,000 vehicles with a high proportion of heavy traffic, and traffic jam also constantly occurs. [...]
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IP0352 - The method for estimating the position of the inspection Image using image registration
Recently, many studies have been attempted to utilize fourth industrial revolution technologies such as artificial intelligence and drones for visual inspection of large-scale civil structures such as bridges and dams. When periodic inspections of facilities that have acquired visual information about their exteriors are conducted, accurate location information is required for the acquired images [...]
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IP0257 - UAV-based bridge inspection and damage detection
Visual inspection of bridges is performed to detect damage and deterioration of bridge members and assess the condition of bridges. Bridge inspection platforms and scaffolds are typically used to access hard-to-reach structural elements and spots for visual inspection. But these inspection practices can interrupt traffic flows and cause safety issues for inspectors. As an alternative, a UAV (Unmanned [...]
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IP0023 - Use of Ultra-High Performance Fibre Reinforced Concrete for the rehabilitation of Swiss road bridges
The road bridges of the swiss national road network present an average age that reaches and sometimes exceeds the half of their design service life. Following the common practice in Europe in the middle of the 20th century, the majority of these bridges were constructed of reinforced or prestressed concrete thus presenting nowadays significant durability issues. Ultra-high performance fibre reinforced [...]
