V. Marinos

National Technical University of Athens | NTUA · School of Civil Engineering

Characterization and modelling of earth processes lies in the focus of every modern approach in Earth Sciences. Concerning the variety in the nature of the processes themselves (landslides, rockfalls, earthquakes and climate changes), variability of the causing factors, differences in the extent of the effects and corresponding hazards and risks, t...

The Special Issue "New Perspectives for the Monitoring and Early Detection of Geohazards" published in the Land Journal is a collection of research articles, case studies, and reviews associated with recent developments on the monitoring and early detection of geohazards, and is now open for manuscript submission using the following link: https://w...

Medicanes, a type of strong hurricanes/cyclones occurring in the Mediterranean, can be the source of major geohazard events in Mediterranean coastal and inland areas. Medicane Ianos that hit Greece during 17–19 September 2020 caused widespread damage, with numerous landsides and floods being the most prominent. Following the landfall of Medicane Ia...

Reality capture technologies such as Structure-from-Motion (SfM) photogrammetry have become a state-of-the-art practice within landslide research workflows in recent years. Such technology has been predominantly utilized to provide detailed digital products in landslide assessment where often, for thorough mapping, significant accessibility restric...

The friction angle of a flat rock surface decreases linearly with the constant mi of the Hoek-Brown criterion and increases linearly with the Brinell penetration hardness. Background The macroscopic failure of an intact rock in triaxial compression is generally controlled by shear in the entire brittle field. Accordingly, the shear strength paramet...

The mechanical behavior of low porosity carbonate rocks is investigated by a series of conventional triaxial compression tests performed at room temperature, at various confining pressures up to 70 MPa and at a constant strain rate of 5 × 10 ⁻⁵ s⁻¹. Aiming at an improvement of the accuracy and quality of the constant mi of the non-linear Hoek–Brown...

The challenge in intelligent cities is to recognize the benefits of using big data. The management of big datasets enables efficient data storage and processing to enhance information for the decision-making process. The key aim of this paper is to highlight how geological, engineering geological and geotechnical knowledge can be managed in a well-...

The seed motivation behind this paper is the realization that time is not given its due as a concept in Civil Engineering. The corresponding education need is expressed with the question "what educational material can stress the importance of time and how can it be produced?". The approach chosen to answer the first part of the question was to juxt...

Uncertainty is prevalent in the ground due to constant modifications throughout its geological history, which results in temporal and spatial variability of its properties and stress regime (Yau et al. 2020). In tunnelling, uncertainty has the tendency to propagate through the different project' stages, e.g. from geotechnical parameters to rock mas...

The brittle-ductile transition, is usually related to the strength of rocks. For instance, in silicate rocks undercompression, the transition from brittle to ductile failure in a wide range of rock types is defined by σ1=4.4σ3,where σ1 and σ3 are the principal stresses, for silicate rocks and somewhat higher for carbonate rocks (Mogi,2007). Zuo et...

Rockfall events consist one of the most hazardous geological phenomena in mountainous landscapes, with the potential to turn catastrophic if they occur near an anthropogenic environment. Rockfall hazard and risk assessments are recognized as some of the most challenging surveys among the geoengineering society, due to the urgent need for accurate f...

Landslides are a critical geological phenomenon with devastating and catastrophic consequences. With the recent advancements in the geoinformation domain, landslide documentation and inventorization can be achieved with automated workflows using aerial platforms such as un-manned aerial vehicles (UAVs). As a result, ultra-high-resolution datasets a...

The island of Lefkada, Greece periodically suffered environmental and structural damages induced by earthquakes. During the twenty-first century, two moderate events of magnitude M > 6 occurred in 2003 and 2015 (M6.2 and M6.5, respectively). The dominant type of the earthquake-induced environmental failures was rock falls and slides that were wides...

A systematic but straightforward probabilistic approach was adopted for the preliminary design using a tunnel case in Egnatia Odos Highway. This tunnel was excavated in a heterogenous molassic formation in Northern Greece, and more specifically in tectonically undisturbed but lithologically varied sedimentary series. This research aimed to identify...

Landslides represent a significant hazard for pipelines because they can generate permanent ground displacement and tend to result in complete failure or significant leaks, major environmental impacts and long periods of service disruption. Hence, landslide-related incidents are regarded as a significant operational risk. The paper mainly focuses o...

On September 17-20 2020 Medicane Ianos impacted Greece. The Medicane was associated with significant wind speeds, and precipitation. The amount of precipitation during a duration of about ~48 hrs was among the highest recorded in certain areas and exceeded in certain areas the mean annual precipitation. The extent of the affected area was very larg...

The trend today to ever increasing modelling sophistication demands that much more attention be paid by practitioners to achieving better appreciation and characterization of geology and rockmass variability, so that rock–structure interaction effects can be analysed more realistically in better calibrated models. This paper is thus directed toward...

Rockfalls are one of the most dominant geological hazards in mountainous rocky regions with the potential to turn catastrophic if they occur in an anthropogenic environment. Therefore, the identification of potential rockfall locations is of high importance. Susceptibility is the magnitude that describes these locations and its qualitative and quan...

The increased development of computer vision technology combined with the increased availability of innovative platforms with ultra-high-resolution sensors, has generated new opportunities and fields for investigation in the engineering geology domain in general and landslide identification and characterization in particular. During the last decade...

The chapter deals with the geotechnical classification of weak and complex rock masses. The term “weak rock mass” instead of “soft rock” is generally used in this chapter to highlight better the nature of the examined geomaterial. The weak rock masses that are examined in this study are generated by tectonical compression or weathering either the p...

Olynthios river is located in Chalkidiki region in Northern Greece. The conceptual model for the preliminary design highlights the engineering geological factors that have been analyzed for the construction of an earth fill dam that will be used for irrigation purposes. At the dam foundation area a tectonic contact is identified between Mesozoic me...

In a world where technology provides increasingly powerful tools every day, the range of possibilities for scientific modelling, illustration and presentation becomes vast. It is now a challenge for scientists to combine their creative thought, artistry and collection of available platforms and tools to produce ingenious, cutting-edge and comprehen...

Nowadays, the implementation of high-end technology (UAV, LiDaR) in engineering geology, combined with a solid geo-engineering background of the researcher, could lead to realistic and accurate conceptual models. In this case study, an engineering geological conceptual model of “Apothikes”, Santorini island, Greece has been constructed. The constru...

Late years, innovative close-range Remote Sensing (RS) technology such as Unmanned Aerial Vehicle (UAV) photogrammetry and Terrestrial Laser Scanning (TLS) are widely applied in the field of geoscience due to their efficiency in collecting surface data. Detection and mapping of landslide and rockfall events using RS products has been proved to be a...

Rockfalls constitute an abrupt type of landslide process with manifold impact at local level, on economy and mostly on a human modified environment. Rapid automated and accurate mapping of rockfalls’ characteristics are crucial in order to identify areas of potential risk and propose mitigation measures. Simultaneously, urban expansion in hazardous...

Late years, innovative close-range remote sensing technology such as Unmanned Aerial Vehicle (UAV) photogrammetry and Terrestrial Laser Scanning (TLS) are widely applied in the field of geoscience due to their efficiency in collecting data about surface morphology. Their main advantage stands on the fact that conventional methods are mainly collect...

The underground mining is the only potential way for the utilization of the lignite reserves from an open pit exploitation which could remain unexploited due to high stripping ratios. This paper is dealing with the findings of a pilot scale underground exploitation that was developed in the Prosilio open pit coal mine in Northern Greece. The method...

A variety of remote sensing tools have been extensively used in the past years for landslide detection and mapping purposes. In addition, detection and mapping of landslide and rockfall events using remote sensing products has been proved to be an effective approach to provide landslide inventories (Scaioni et al., 2014). However, most of the studi...

Rockfalls consist one of the most dominant geological hazards in mountainous rocky regions with the potential to turn catastrophic if occurs in the anthropogenic environment. Due to that fact, the identification of the possible locations to produce the phenomenon is of high importance. Susceptibility is the parameter describes these locations and t...

Rockfalls constitute an abrupt type of landslide process with manifold impact at local level, on economy and mostly on a human modified environment. Over the past few decades, urban expansion in hazardous areas and development of modern transportation and energy infrastructure, combined with a global demand for higher safety standards, have rendere...

During the last decade, there has been an increasing demand in geo-engineering society for automatically monitored areas susceptible to landslide and catastrophic rockfall events. Traditional methods were supplemented, mostly by in-situ observational methods held by experts or by point-based approaches such as inclinometers and GPS measurements. La...

Last decade, there has been an increasing demand in geo-engineering society for automatically monitoring areas susceptible to landslide and rockfall events. Traditional methods were compiled by in-situ observational methods from experts or by point-based approaches such as inclinometers and GPS measurements. Lately, innovative remote sensing techno...

Landslides and rockfalls phenomena have serious dramatic impacts in society and infrastructure and lead to disastrous situations. To mitigate the effects of those disasters, precise and accurate data in emergency situations is valuable to provide knowledge to experts. Nowadays, close-range photogrammetry and individually UAV photogrammetry has beco...

The paper focuses on the assessment of landslide hazard and risk along or across the Trans Adriatic Pipeline (TAP) natural gas pipeline project in Albania. TAP is a natural gas pipeline that will transport gas from the Caspian Sea to Europe, crossing Northern Greece and Southern Albania. It has long been recognised that landsliding is a major facto...

The maintenance of the archaeological site of Delphi, as well as visitors and employers safety, is, directly, related to local geotechnical stability conditions. So, a first approach of understanding possible changes in slope geometry and knowledge of underlying engineering properties of the rock mass, was made, to minimize significant risks, which...

Remote sensing techniques have become increasingly popular within the engineering geological field with multiple applications, such as the detection, identification and evaluation of the structural features of rockmasses, stability analysis and assessment of slopes, underground excavations, mines, rockmass assessment, etc. Within this concept, LiDA...

Santorini Island constitutes one of most unique geological structures as it compromises a distinctive Miocene volcano. Rockfalls and landslides are widespread phenomena in Santorini due to orientation and steepness of the cliffs which are mainly formed as high elevated lava domes with loose material inside, extruded by sticky, slow-flowing dacite l...

Laser scanning has proven useful in the stability assessment of underground openings. High accuracy points captured are used to generate 3D surface models to evaluate their stability by assessing rockmass structural features. A series of scans obtained from underground ancient quarries in Paros Island were processed. The structural analysis of the...

A moderate, shallow depth, earthquake (Mw = 6.5) occurred onshore Lefkada island on November 17, 2015 with the focal depth estimated at 11 km. The seismic fault is a near-vertical strike-slip fault running along the western coast, part of the Cephalonia Transform Fault. Landslides and ground cracks were mainly reported at the western part of the is...

Remote sensing techniques have become increasingly popular within the engineering geological field. Nowadays, the incorporation of "State-of-the-Art" aerial platforms, the so called Unmanned Aerial Vehicles (UAVs) in the procedure of hazard assessment enabled the enhancement of national concrete disaster geo-information management and emergency pre...

The prediction of the average size of fragments in blasted rock piles produced after blasting in aggregate quarries is essential for decresing the cost of crushing and secondary breaking. There are several conventional and advanced processes to estimate the size of blasted rocks. Among these, the empirical prediction of the expected fragmentation i...

A methodology for designing a tunnel support system according to the actual ground conditions and the critical behaviour types is analysed in this paper. The methodology is justified with the principles of the New Austrian Tunnelling Method that incorporates the top heading and bench method. The role of the geological material and its implication i...

In rock engineering design, significant advances have occurred in recent years in numerical modelling capability with increasing trends to ever greater use of synthetic rock mass models and discrete fracture network (DFN) modelling, but all too often with little comparative improvement in geologic base data. As a consequence, there is even more nee...

This present paper presents an adopted methodology for Micro Tunnel Boring Machine (TBM) selection, based on the results of a geological-geotechnical feasibility assessment of a microtunnel, planned for a natural gas pipeline beneath an active landslide, in the Corovode area, southern Albania. This example offers an excellent case study of diverse...

Use of the geological strength index (GSI) rock mass classification system and the associated m, s and a parameter relationships linking GSI with the Hoek–Brown failure criterion provides a demonstrated, effective and reliable approach for prediction of rock mass strength for surface and underground excavation design and for rock support selection...

The outstanding Red Beach in Santorini, a famous volcanic island in the Aegean Sea in the territory of Greece, exhibits extended rockfall instabilities along its cliffs, placing its highly frequented touristic zones at high risk. This study aimed to generate an engineering geological interpretation of these instabilities and to evaluate the degree...

The scope of this study is to investigate the failure mechanisms of the eastern coastal zone of Mount Athos, using the LiDar device for the 3D mapping of the structural features of the rock mass. Therefore emphasis was given to the study of the planes of discontinuities that can trigger potential failures. All slopes were scanned by LiDar device in...

The design and construction of underground works in an urban environment, face several geological challenges. The construction of a well-structured database, able to store, manage, analyse and correlate a large amount of geological and geotechnical data, is a powerful tool towards the geological hazard assessment and the geotechnical characterisati...

Η παρούσα έρευνα εστιάζεται στην χρήση επίγειου σαρωτή LiDar στην τεχνικογεωλογική ερμηνεία του φαινομένου των καταπτώσεων και στην αξιολόγηση του βαθμού επικινδυνότητας εκδήλωσης νέων καταπτώσεων σε ηφαιστειακό πρανές της νήσου Σαντορίνης. Στην περιοχή εκτός από την επίγεια σάρωση, εφαρμόστηκαν τοπογραφικές μέθοδοι για την ειδική αποτύπωση των βρα...

Landslides represent a significant hazard for pipelines because they can generate permanent ground displacement and tend to result in complete failure or significant leaks, major environmental impacts and long periods of service disruption. Hence, landslide-related incidents are regarded as a significant operational risk. The paper mainly focuses o...

A correlation between the non-dilational friction angle (φm) of rock discontinuities and the constant mi of the Hoek and Brown criterion for intact rock is investigated, using the results of a focus oriented laboratory program. The program consisted of two types of laboratory tests: a series of triaxial compression tests on intact rock samples for...

The paper deals with the evaluation of strength and deformability of sedimentary rocks and ophiolites based on the processing of laboratory testing results. Characteristic values and their typical range for the parameters σci, Ei , as well as the Modulus Ratio (MR) are presented. These parameters are significant for the estimation of the strength a...

The paper deals with the geotechnical classification of weak and complex rock masses. The complexity of these geological material demands a more specialized research and geological characterization due to the special features of their rock mass types regarding both their structure and their lithological characteristics. The weak and complex rock ma...

The paper deals with the engineering geological behaviour of rock masses in underground excavations. In general, the application of the well-known classification systems has the drawback of not displaying necessary information concerning the behaviour of rock masses, especially the weak ones, in tunnelling. Consequently, there are many cases in whi...

The paper describes a large scale landslide in a coal mine in Servia area in Kozani, Greece, which occurred on February 2011. The landslide, of ~250m width and ~350m length, took place within marly lacustrine sediments. The main factors for the manifestation of the landslide were a temporary stoppage of works, the existence of a specific weak surfa...

The scope of this study is to investigate the failure mechanisms of the eastern coastal zone of Mount Athos, using the LiDar device for the 3D mapping of the structural features of the rock mass. Therefore emphasis was given to the study of the planes of discontinuities that can trigger potential failures. All slopes were scanned by LiDar device in...

Historical and archaeological evidence shows that ancient Hellenes had developed underground aqueducts since the prehistoric times. However, innovative methods of underground aqueducts were developed in Hellas mainly during the Archaic, Classical, Hellenistic, and Roman periods. Since the well-known tunnel at the island of Samos, Hellas, was design...

Landslides represent a significant hazard for pipelines because they can generate permanent ground displacement and tend to result in complete failure or significant leaks, major environmental impacts and long periods of service disruption. Hence, landslide-related incidents are regarded as a significant operational risk. The paper mainly focuses o...

The present work presents an engineering geological assessment using terrestrial laser scanning for the study of stabilization of a rock slope in Santorini island that has suffered from several rock slide incidents. The use of LiDar laser scanning and focused surveying provided valuable data for the engineering geological zonation of the area and t...

The investigation of alternative solutions for the Thesaloniki Ring Road has been one of the major project design challenges in the recent years in Greece. Pefka tunnel was included in one of the alternatives that have been proposed and thoroughly examined. The total length of the tunnel was *1450 m and it had two branches, with three lanes per bra...

The term weak rock mass is usually associated in design and construction with potential problems or even failures, although this is not always the case. Weak rock masses could be cases with very low intact rock properties, highly tectonized or/and weathered rock masses, rock masses with members of low strength and/or inherent heterogeneity. In this...