The Usability of Terrestrial 3D Laser Scanning Technology for Tunnel Clearance Analysis Application

2014 ◽  
Vol 683 ◽  
pp. 219-224 ◽  
Author(s):  
Gregor Novaković ◽  
Aleš Lazar ◽  
Simon Kovačič ◽  
Milivoj Vulić
Keyword(s):  
Laser Scanning ◽  
Field Work ◽  
Data Interpretation ◽  
Survey Method ◽  
3D Laser Scanning ◽  
Monitoring Methods ◽  
Complex Objects ◽  
Scanning Method ◽  
Spatial Parameters ◽  
Underground Constructions

After building underground constructions, spatial parameters monitoring is essential due to safety and statuary reasons. Therefore after completion of work in tunnels often supervision projects follow which include cross sections measurements, as well as ground and secondary wall layer deformations monitoring during consolidation era. Conventional approaches to achieve this type of documentations are different, however their downside is often that they are time consuming and even with combination of independent contractors, collected data is often deficient and corrupted with rough interpolations. Terrestrial 3D laser scanning (TLS) represents alternative approach to conventional monitoring methods [1]. With engineer planning approach, field work and data interpretation, TLS technology allows systematical and fast acquisition of shape and spatial orientation of complex objects and all their components. In case of shorter railway tunnels (up to 360 m) data for clearance analysis in correlation of standard cargo and tunnel surface, was captured with terrestrial 3D laser scanning method. Control of tunnel clearance is usually performed analogously and on conventional low equidistant cross section survey method. Considering that in this article we deal with relative old tunnels, in which there is no constant transversal profile but huge amount of geometric anomalies, simulation verification could be performed only with hi-grid definition survey method. With TLS larger amount of tunnels were measured and clearance analysis simulations for real case of standard cargo profile was made, based on radius and railway inclination of the tunnel. Standard or non-standard cargo transport planning with computer simulation now can be done in relatively short time. In this article is presented integration of TLS in case study of short railway tunnels with focus on clearance analysis applications with interactive and user friendly visualization for data interpretation. Other methods for different spatial parameters interpretations in underground constructions are presented as well.

Measurement of erosion state and refractory lining thickness of blast furnace hearth by using three-dimensional laser scanning method

2020 ◽  
Vol 118 (1) ◽  
pp. 106
Author(s):  
Lei Zhang ◽  
Jianliang Zhang ◽  
Kexin Jiao ◽  
Guoli Jia ◽  
Jian Gong ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Laser Scanning ◽  
Refractory Lining ◽  
Three Dimensional ◽  
3D Laser Scanning ◽  
Scanning Method ◽  
Blast Furnace Production ◽  
Severe Erosion ◽  
Residual Thickness ◽  
Minimum Depth

The three-dimensional (3D) model of erosion state of blast furnace (BF) hearth was obtained by using 3D laser scanning method. The thickness of refractory lining can be measured anywhere and the erosion curves were extracted both in the circumferential and height directions to analyze the erosion characteristics. The results show that the most eroded positions located below 20# tuyere with an elevation of 7700 mm and below 24#–25# tuyere with an elevation of 8100 mm, the residual thickness here is only 295 mm. In the circumferential directions, the serious eroded areas located between every two tapholes while the taphole areas were protected well by the bonding material. In the height directions, the severe erosion areas located between the elevation of 7600 mm to 8200 mm. According to the calculation, the minimum depth to ensure the deadman floats in the hearth is 2581 mm, corresponding to the elevation of 7619 mm. It can be considered that during the blast furnace production process, the deadman has been sinking to the bottom of BF hearth and the erosion areas gradually formed at the root of deadman.

The Application of 3D Laser Scanning Method in the Measurement of Pressure Vessel

2017 ◽  
Vol 865 ◽  
pp. 595-598
Author(s):  
Hui Zeng Yin ◽  
Xin Wei Yang ◽  
Rui Lan Tian ◽  
Xiu Zhi Sui
Keyword(s):  
Pressure Vessel ◽  
Point Cloud ◽  
Laser Scanning ◽  
Convex Surface ◽  
Measuring Method ◽  
Point Cloud Data ◽  
3D Laser Scanning ◽  
Scanning Method ◽  
Cloud Data ◽  
Dangerous Goods

Pressure vessel is widely used in the industrial engineering. Many materials in pressure vessel are inflammable and explosive dangerous goods. If the accident happens, great harm will be done to the lives and properties of people. Some common methods for studying pressure vessel have obvious drawbacks. 3D laser scanning method uses non-contact measuring method and can directly obtain the point cloud data of the mass surface which can be used to reconstruct any convex surface. According to the advantages of 3D laser scanning method, in this paper, it is introduced to measure the dimensions of flanges in pressure vessel. The experimental results obtained have little errors, which certify that 3D laser scanning method can be used to measure the dimensions of flanges and further study the characteristics of pressure vessel.

DATA COLLECTING METHODS USED IN THE FIELD WORKS ON THE SITE OF THE WEATHERING ANHYDRITE ROCKS AT PISKY NEAR LVIV

2016 ◽  
pp. 0-0
Author(s):  
Damian ŁUGOWSKI ◽  
Adrian JARZYNA ◽  
Maciej BĄBEL ◽  
Krzysztof NEJBERT
Keyword(s):  
Laser Scanning ◽  
Structured Light ◽  
3D Laser Scanning ◽  
Field Methods ◽  
Scanning Method ◽  
Advantages And Disadvantages ◽  
Collecting Methods ◽  
Geomorphological Processes ◽  
Field Works ◽  
Terrestrial Photogrammetry

In the quarry at Pisky, 30 km south of Lviv, due to weathering (hydration) of anhydrite (CaSO4), and its transformation into gypsum (CaSO4•2H2O) the volume of the rock increases and the unique forms of relief form called the hydration domes. In the interiors of the growing domes chambers are formed that gradually transform into the caves called the hydration caves (or the swelling caves). At the same time the rocks dissolve and their surface is covered with rillenkarren. The unusual weathering and geomorphological processes taking place today require the accurate documentation and monitoring. In this paper we describe the optimum field methods used to document the zone of weathering. These methods include: method of benchmarks, method of 3D laser scanning, method of scanning with structured light LED, method of terrestrial photogrammetry, and the method of modelling of 2.5D objects using photogrammetry. We discuss the advantages and disadvantages of the methods used.

scholarly journals Harbour Infrastructure Inventory Development with 3D Laser Scanning Method

2015 ◽  
Vol 22 (1) ◽  
pp. 99-108
Author(s):  
Sławomir Świerczyński ◽  
Piotr Zwolan
Keyword(s):  
Laser Scanning ◽  
Three Dimensional ◽  
Great Accuracy ◽  
Modern Technology ◽  
3D Laser Scanning ◽  
Scanning Method ◽  
Inventory Development ◽  
Three Dimensional Models ◽  
Polish Law ◽  
Port Infrastructure

Abstract In the Polish law harbour infrastructure is one of key elements to determine the various cargo types, available means of transport and, ultimately, the significance of any sea port. The structures, devices and installations situated within a port’s boundaries, dedicated to the swift operation of the port, are all designed for tasks that involve the best use of this infrastructure. The proper development and modernization of this infrastructure may well result in improved cooperation with road networks and transportation on land. Owing to modern technology, it is possible to scan the surrounding buildings or location with great accuracy and render three-dimensional models of the scanned objects. These models can be used to generate harbour maps with a detailed 3D picture of the entire port and navigational infrastructure. The authors of this article present the possible applications of modern laser scanning technology in port infrastructure surveying, and in particular in the survey of a complicated wharf line on the Motława River along Długie Pobrzeże Street in Gdańsk.

Measurement of Garment Bagging Deformation Using a 3D Laser Scanning Method

2006 ◽  
Vol 10 (2) ◽  
pp. 10-18 ◽  
Author(s):  
Laikuen Chan ◽  
Mansang Wong ◽  
Zhenge Dong ◽  
Jinlian Hu ◽  
Siuping Chung
Keyword(s):  
Laser Scanning ◽  
3D Laser Scanning ◽  
Scanning Method

scholarly journals Slope stability monitoring in open pit mines using 3D terrestrial laser scanning

2018 ◽  
Vol 66 ◽  
pp. 01020
Author(s):  
Miroslawa Bazarnik
Keyword(s):  
Slope Stability ◽  
Laser Scanning ◽  
Terrestrial Laser Scanning ◽  
Open Pit ◽  
Monitoring Methods ◽  
Rock Falls ◽  
Mining Operations ◽  
Open Pit Mines ◽  
Scanning Method ◽  
Stability Monitoring

In open pit mines the aspect of preventing and forecasting the threat of landslides and rock falls is crucial issue because of the significant consequences that instabilities may have. Systematic slope stability monitoring is necessary to ensure safe and continuous mining operations. The development of innovative technologies, such as 3D laser scanning, opens up new possibilities, especially in the case of large and hard-to-reach areas, such as open pit mines. Terrestrial laser scanners (TLS) provide fast, efficient, detailed, and accurate three-dimensional data. The article discusses the use of 3D terrestrial laser scanning method to monitor slope displacements and landslides in open pit mines. The first part of the article discusses the risk scale of gravitational displacement on the slopes, on examples of Polish open pit mines, and introduces the most common slope monitoring methods. Then, the principles of 3D terrestrial laser scanning were defined, and some examples of TLS applications in the open pit mines were presented.

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