Dates (alternatively): Wednesday, Nov 29, 2017 OR Thursday, Nov 30, 2017
Time: 11:00am to 12:00pm
Duration: 1 hour
Presenter: Michael Xinogalos, Surveying Eng. NTUA
The aim of this project is to generate a sector-specific theoretical and practical syllabus essential for the specialization process of the Mediterranean Ecoengineering sector.
Also, to jointly develop a long-term interaction scheme among the stakeholders of the ecoengineering sector and to deliver a training courses programme technology enhanced in “Soil and Fluvial ecoengineering, Hazard Assessment and Techniques Selection in Mediterranean Environment”.
This new syllabus will be generated during the implementation of the long-term strategy of the proposal “Specialisation process for the ecoengineering sector in the Mediterranean environment (ECOMED)”.
Hellenic Petroleum SA holds a leading position in the Greek energy sector, as well as in the greater area of Southeast Europe. In Greece, the Group owns and operates three refineries, in Aspropyrgos, Elefsina and Thessaloniki. The three refineries, combined, cover 76% of the country’s total refining capacity.
As in many refineries and other industrial facilities all over the world, the as-built status of existing equipment and components of the Aspropyrgos refinery is poorly documented. Documentation consists mainly of 2D drawings which are geometrically inaccurate, incomplete and eventually obsolete. Furthermore, for many years, all designed expansions, repairs and maintenance works have been based on those existing drawings, resulting in on-site undocumented interventions, making the situation worse.
Everyday maintenance and management tasks represent a significant part of the refinery’s operation cost. To reduce these costs, HELPE SA investigated methodologies to create a reliable as-built registry of its existing equipment, which, through industry standard solutions will incorporate the results in everyday operation of the facility.
Thus, a pilot plant survey and intelligent 3D modeling project was awarded for the Vacuum Gas Oil Storage Area (of medium difficulty), in order to demonstrate the efficiency of the proposed methodology under real conditions, to reveal possible problems, to clarify the owner’s requirements regarding the contents and level of detail of the intelligent 3D model and attached information, to define the format of deliverables (3D model and digital drawings’ specifications) and finally to ensure the smooth incorporation of the results to the operational procedures of the refinery.
The pilot project’s area is approximately 27,400 sq.m. large and includes, among other equipment, 4 storage tanks, about 300 pipes and a rather complicated pump station with 19 pumps. The project’s tasks were elaborated in two phases:
Phase A consisted of the 3D laser scanning survey works, including:
Phase B consisted of the intelligent 3D modeling process, using industry standard plant 3D modeling software, including:
The above 3D model was made easily available to the owner in 3D PDF format, together with its attached component database tree structure. Furthermore, the final intelligent 3D model was used to automatically extract updated sample digital drawings for the surveyed pilot area.
Intelligent 3D Models of plant establishments have proven to be an essential tool for plant management, maintenance and design. In addition to the geometric accuracy that a simple 3D CAD model can provide, an intelligent 3D model associates every object with a library of components and their full specifications, thus reflecting the true as-built geometrical and – most important – functional state of the plant at the time of the site survey.
Using appropriate reverse engineering software tools, an intelligent 3D model can be used to automatically generate any kind of drawing (PlotPlans, General Arrangement, Isometrics, P&IDs, EFDs), to design expansion components, to perform collision checking, to extract material lists, to schedule maintenance tasks, to perform stress analysis and other calculations and even to totally monitor, control and manage a plant environment.
Concession Self Financing Projects have been, during the last decade, a common practice for the construction of road transport networks. The basic concept is that a large private J/V undertakes the construction of a new highway section and in the same time takes the responsibility for the maintenance (and improvement) of an existing highway section, from which it collects the toll fees, in order to finance the whole project. After completing the project, the J/V has its full exploitation for a certain number of years, according to the concession contract.
An obvious need for detail surveys of the existing highway sections arises from the whole process. These surveys usually require:
Terrestrial Laser Scanning techniques have been applied in two cases of existing highways (dual carriageway, 2-3 lanes & shoulder), using two different approaches:
Korinthos – Tripoli highway (length 80 km, J/V MOREAS) was surveyed in 2006-2007 using a static (scan & go) approach with an Optech ILRIS 36D Laser Scanner.
Elefsina – Korinthos highway (length 60 km, J/V APION KLEOS) was surveyed in 2008 using a mobile approach with the newest Optech LYNX Mobile Mapper.
a. Korinthos – Tripoli: Field work tasks and parameters
b. Elefsina – Korinthos: Field work tasks and parameters
c. Common post-processing tasks
While the newest mobile TLS approach using the LYNX Mobile Mapper is obviously the method of choice, the static approach with the ILRIS still has some advantages and can be applied at least for smaller road sections, taking into account also the cost of the two systems. The comparison conclusions between the two methods, in terms of data quality, accuracy and productivity are presented below:
SAUDI UNICOM Group, with its headquarters located in Riyadh, Saudi Arabia, is a major player in the Arabic, as well as in the global market, in many sectors (trade, industrial, telecommunications, software, media, etc). Its Geoinformation subdivision, U-MAPS, made in 2011 a strategically significant investment by purchasing a high-end mobile mapping system from OPTECH, the LYNX M1. The system was delivered by OPTECH together with the standard company’s high quality on-site setup, calibration and training services.
UNICOM, having undertaken a quite large mobile mapping project, the survey of major corridors for the “Jeddah Storm Water Drainage Program”, realized the urgent need for extended on project training and support, in order to:
For this purpose, UNICOM engaged Astrolabe Engineering, investing in its extensive experience in “start to finish” mobile surveying workflows using the OPTECH LYNX Mobile Mapper. Astrolabe responded swiftly by providing training and support during field data collection in Jeddah, KSA, training UNICOM’s personnel in Riyadh, KSA and Cairo, Egypt and also undertaking some urgent post-processing tasks to assist in on-time delivery of the first project sections. On-line remote extended support was also made available according to UNICOM’s needs.
As a result, UNICOM / U-MAPS successfully and timely completed all undertaken tasks for the project, having gained the trust of a major client in the area. Furthermore, UNICOM possesses now a fully trained, productive and efficient field and office team for mobile surveying services, having elevated mobile surveying using the OPTECH LYNX Mobile Mapper to the company’s major mapping activity.
The airplane traffic at the Athens International Airport towards its 2 air-corridors (eastern and western) is regulated through 4 roundabout loops, 2 for each corridor. Due to the traffic load, the fact that the heavy aircrafts often have to stop at the loops and the type of the pavement, the tarmac at those 4 areas has developed noticeable deformations. So, the technical department of the A.I.A., in order to define the extent of the damage and decide what kind of corrective actions should be taken (from simple tarmac repairs to full pavement reconstruction), requested a detailed 3D modeling of the tarmac surface, followed by a complete deformation analysis. The methodology should combine a high level of detail (measurement every 2-3 cm), speed (each loop could remain closed only for a few hours) and accuracy (<1cm for elevations).
Laser scanning has proven to be not only the most effective method for the project’s purposes, but in fact the only one applicable, offering the required resolution / level of detail and accuracy at a speed that was acceptable for the airports restrictions.
The Greek Railway Organization main railroad, to its northern exit from Athens, passes through a tunnel complex, consisting of four tunnels (two for each railway line), near the small city of Aghios Stefanos. The NE tunnel, approximately 200m long and 5m wide, was built from stones about 50 years ago. Due to suspected deformations of this tunnel in combination with known geological problems of the whole area, the Greek Railway Organizations ordered a stability check, along with a complete survey of the tunnel and the superjacent ground.
The cross-section based evaluation and comparison of the surveyed tunnel wall to its theoretical geometry revealed large deformations at specific locations (e.g. section 15). These locations have been defined and mapped in detail and repairing actions have been designed. Tunnel has been closed until repair works will be executed. Further geological investigation defined the reason of the deformations to be the presence of slate (sch) and clay (PT) formations at the tunnel’s area and the existence of a possible fault between them.
During a refinery’s operation, it is a common maintenance task to periodically check tanks and other equipment for deformations, in comparison to their theoretical geometry. Significant deformations are a sign of tank wall weakening and pose a risk of critical damage, thus repairing measures have to be consider.
A cylindrical and a spherical tank at HELPE SA Aspropyrgos refinery were checked for deformations using 3D laser scanning methodology. The cylindrical tank was empty and was scanned internally from a single position, while the spherical one was operational and was scanned externally from 3 positions. After basic processing and alignment of scans, the final pointclouds were used for tank wall inspection. In particular, a cylinder and a sphere where best fitted to the respective pointclouds and deviations from those ideal primitive geometries where calculated. Results were presented in 3D, as well as in 2D sections properly spaced, in order to facilitate locating and quantifying the deformations.
3D laser scanning is an ideal methodology for this kind of maintenance inspections of industrial facilities’ equipment due to fast data capture, non-contact measurement, high accuracy and, most important, complete 3D coverage of the scanned objects. Thus, the whole object is efficiently being checked, while specialized software makes inspection tasks quite easy to perform and their results comprehensively presentable.
The “Specialisation Process for the Ecoengineering Sector in the Mediterranean Environment (ECOMED)” project is an initiative to advance the specialization process on landscape bioengineering, and to generate new alliances and dynamics in the sector, within the Mediterranean region. Its specific objectives are:
So, the EcoMed project will enhance bioengineering works at the different stages and phases: design/calculation, implementation/construction, monitoring, and education/training. This will be accomplished by implementing applied research works from 2017 till 2018. These works include the selection of a set of bioengineering tools and projects within the European Mediterranean region to further study and analyze them.
This project that is co-funded by the ERASMUS + Programme of the European Union will generate new tools to improve the possibilities of intervening in the landscape through techniques and approaches of bioengineering, taking into account the particularities of the Mediterranean region.
Overall the consortium comprises of seven universities and seven companies distributed in eight countries throughout the European region with Universidad Politecnica de Madrid the coordinator. Astrolabe Engineering is among the 14 consortium partners.
For more information on the EcoMed project please follows us through the following social media:
The project was assigned by the Maintenance Department of the Greek Ministry of Infrastructures, Transports and Networks in order to improve safety for high accident risk locations (mainly road junctions) all over the Greek road network and, in particular, to design and evaluate through video simulations the appropriate improvement interventions for these locations.
Laser scanning has proven to be not only a fast data capture tool to provide accurate and complete survey background data for road design purposes, but also an easy and efficient way of creating “before / existing” and “after / as designed” colored video fly-through and driving simulations to easily compare and evaluate the efficiency of designed – proposed interventions, before their actual implementation.
Close to the city of Thessaloniki, in Northern Greece, the Patras – Athens – Thessaloniki – Evzoni (P.A.TH.E.) Motorway, which is the main from South to North road transport axis of Greece, crosses the Axios river, one of the largest of the wider Balkan area. The crossing occurs with two long bridges, each carrying one carriageway. The southern bridge was constructed first about 40 years ago, while the northern one is much newer.
The southern bridge is 780 m long with 25 spans, built from armed concrete and has begun to show noticeable damages through time. The Greek Ministry of Environment, Planning and Public works assigned a project to check the bridges efficiency. Within the frame of this project, a complete 3D survey and deformation analysis was required.
To better evaluate the 3D deformations of the bridge components, the results were presented as a longitudinal section of all examined deck edges, as well as angular measurements for each pier along the 3 axis, to demonstrate possible pier rotation. The evaluation showed insignificant rotations for the piers, but surprisingly revealed considerable subsidence of all piers, except those which were founded in the river’s bottom. Different type of foundation was identified as the most possible cause for this problem. Corrective actions are being studied to prevent further damage and deformation of the bridge’s structure.