Francisco Lamas

Francisco Lamas
University of Granada | UGR · Department of Civil Engineering

PhD

About

61
Publications
43,224
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453
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Introduction
I am currently working on the tense, deformational modeling of slopes in the reservoir vessels to check their behavior in seismic events and the impact of possible landslides in the stability of the dam. The methodology used is the development of digital maps of the terrain from real data and from the study of this cartography, develop an inventory of unstable areas that will be studied by means of limit balance programs and finite element models, thus defining the safety factors of the sliding circles and the deformed circles produced.
Additional affiliations
January 2000 - present
University of Granada
Position
  • Professor (Associate)

Publications

Publications (61)
Article
Full-text available
Slope-stability analysis is one of the parameters in the design of road embankments that the designer must consider in order to ensure stable and safe construction. The technical standards recommend slopes to heights of 12 m, depending on the soil types and the topography. In the present work, the limit equilibrium methods (Fellenius, Bishop, Janbu...
Article
Full-text available
Numerical modeling is a powerful tool to determine the stress-strain relationships of structures. However, for a reliable application, physical and mathematical models must be calibrated and validated. This paper presents an overview of numerical calibration through the finite element method and plate-load tests in an embankment. Additionally, an a...
Conference Paper
Synthetic Aperture Radar Interferometry (InSAR) is a remote sensing technique very effective for the measure of smalldisplacements of the Earth’s surface over large areas at a very low cost as compared with conventional geodetictechniques. Advanced InSAR time series algorithms for monitoring and investigating surface displacement on Earth arebased...
Data
Safety factors by the limit equilibrium methods (Fellenius, Bishop, Janbu, Morgensten-Price) and the finite element method were obtained for embankments of 6 m, 12m, 18m, 24m, and 30m high.
Article
Full-text available
The last seismic events showed that tunnel lining may suffer extensive damage. Employing numerical modeling has a great importance in predicting the seismic performance of tunnels. This paper tests the tunnel lining of the Zaouit Ait Mellal (ZAM) twin tunnels located between the cities of Marrakesh and Agadir in Morocco. Dynamic analysis was adopte...
Article
Full-text available
Deformation monitoring is a common practice in most of dams to ensure their structural health and safety status. Systematic monitoring is frequently carried out by means of geotechnical sensors and geodetic techniques that, although very precise an accurate, can be time-consuming and economically costly. Remote sensing techniques are proved to be v...
Article
Ballast/fines mixture is often found in railway substructure and the overall behaviour of tracks is strongly dependent on the mechanical behaviour of this mixture. Since directly testing such mixture with large grains is limited with common laboratory equipment, the consideration of a model material at smaller size is advisable. Parallel gradation...
Article
Full-text available
RESUMEN Se describen los resultados alcanzados en el desarrollo de investigaciones que constituyen importantes aportes para la vialidad del país, considerando las condiciones propias de materiales, de tráfico y ambientales, como son los métodos creados para el diseño de pavimentos flexibles y rígidos de nueva construcción, así como los métodos de d...
Conference Paper
Full-text available
Dams require continuous security and monitoring programs, integrated with visual inspection and testing in dam surveillance programs. New approaches for dam monitoring focus on multi-sensor integration, taking into account emerging technologies such as GNSS, optic fiber, TLS, InSAR techniques, GBInSAR, GPR, that can be used as complementary data in...
Article
Full-text available
The need for understanding the architectural elements of the environment of the river Río Blanco in Cogollos Vega in the north of Granada as a territorial and cultural landscape underlies in its memories and symbolic value, determined by «places with identity» with a significant role in a global context. These places are worthy of preservation for...
Conference Paper
The Aswan High Dam, Egypt, was built in the 1960s and is one of the biggest dams in the world. It stopped the seasonal flood of Nile river allowing the urban expansion of cities/villages and the full year cultivation, producing 10×10⁹ kWh of power annually. The dam is located in an area where several earthquakes (M L <;6) occurred from 1981 to 2007...
Article
Full-text available
RESUMEN Se describen los resultados alcanzados en el desarrollo de investigaciones que constituyen importantes aportes para la vialidad del país, considerando las condiciones propias de materiales, de tráfico y ambientales, como son los métodos creados para el diseño de pavimentos flexibles y rígidos de nueva construcción, así como los métodos de d...
Article
Full-text available
Dams require continuous security and monitoring programs, integrated with visual inspection and testing in dam surveillance programs. New approaches for dam monitoring focus on multi-sensor integration, taking into account emerging technologies such as GNSS, optic fiber, TLS, InSAR techniques, GBInSAR, GPR, that can be used as complementary data in...
Chapter
Full-text available
RESUMEN En el presente trabajo se muestra el caso de la urbanización Los Cármenes del Mar (Almuñécar, Granada). Parte de esta urbanización, de unas 416 viviendas, se construyó sobre un deslizamiento preexistente. Numerosas viviendas han sido evacuadas recientemente y se ha declarado oficialmente el " estado de emergencia " en el complejo urbanístic...
Conference Paper
Open image in new windowDeterministic methods are appropriate for analyzing specific slopes at site-scale where geotechnical parameters are better known. Probabilistic techniques provide better results than deterministic methods at regional scales (1:10,000–1:50,000). However, the performances of deterministic and probabilistic methods at large sca...
Article
Main rivers have been traditionally linked with important human settlements through history. The increasing development of the cities and the dynamism of these media demand the use of multidisciplinary approaches to characterize the drainage network evolution in relation with urbanized areas. In this study, we report the vertical ground motion in t...
Article
Major rivers have traditionally been linked with important human settlements throughout history. The growth of cities over recent river deposits makes necessary the use of multidisciplinary approaches to characterize the evolution of drainage networks in urbanized areas. Since under-consolidated fluvial sediments are especially sensitive to compact...
Conference Paper
Full-text available
RESUMEN En el presente trabajo se presenta una metodología acerca de la simulación del proceso constructivo de terraplenes de obras viales, teniendo en cuenta el empleo de técnicas numéricas con un modelo físico-matemático que responde a las condiciones reales de trabajo de este tipo de obras. Es obtenido además el factor de seguridad del talud med...
Article
The Marina del Este and Los Cármenes del Mar resorts, in the municipality of Almuñécar (Granada) were developed onto areas with large-dormant landslides, as they generally present a more gentle slope than adjacent stable zones. Consequently, landslides have been reactivated, as DInSAR results confirm. During the rainy winter 2009-2010, movements we...
Article
In the present work, the case of the Cármenes del Mar resort (Granada, Spain) is shown. It can be considered one of the most extreme examples on the Mediterranean coast of severe pathologies associated with urban development on coastal landslides. The resort, with 416 dwellings, was partially built on a deep-seated landslide which affects a soft fo...
Article
Full-text available
The sedimentary basins of Loja, Malacatos-Vilcabamba and Catamayo belong to the Neogene-Quaternary synorogenic intramontane basins of South Ecuador. They were formed during uplift of the Andes since Middle-Late Miocene as a result of the Nazca plate subduction beneath the South American continental margin. This E-W compressional tectonic event allo...
Article
Ground subsidence in the southeastern border of the Granada Basin (SE Spain) has been studied using remote sensing techniques. Over the last decades, the region has experienced a huge urban expansion which has caused a substantial increase in water supply requirements. Water needs are exclusively met by groundwater by means of numerous pumping well...
Article
Full-text available
This study uses the InSAR technique to analyse ground subsidence due to intensive exploitation of an aquifer for agricultural and urban purposes in the Montellano town (SW Spain). The detailed deformation maps clearly show that the spatial and temporal extent of subsidence is controlled by piezometric level fluctuations and the thickness of compres...
Conference Paper
Full-text available
El rápido desarrollo urbanístico en la costa mediterránea española, ocurrido a partir de los años '80, no siempre ha estado acompañado de una correcta planificación que tenga en cuenta los riesgos de carácter geológico que lo puede afectar. En ese sentido, la interferometría radar satelital (InSAR) pueden resultar una herramienta de extraordinaria...
Conference Paper
Combinations between advanced geotechnical and probabilistic modelling are scarce in the specialized literature. Here, we present the stability and susceptibility analysis carried out over the cut slopes of the A-328 road (Granada, SE Spain). This analysis compare and combine different geotechnical and probabilistic techniques for studying the inst...
Conference Paper
In most of highlands of Andalusia, the road network represents the only admissible way for transportation. Therefore, it is essential to conduct a comprehensive analysis of the relief on slopes, promoting a new methodology that using satellite techniques, aerial photographs and the aerial and ground LIDAR, performs an assessment of the pathologies....
Conference Paper
Remote sensing techniques have become a critical and universal tool for natural hazards and specifically for landslides studies. They offer the ability to provide consistent measurements of landscape condition, allowing detection of both abrupt changes and slow trends over time range. Remote sensing allows carrying out a landscape dynamics monitori...
Conference Paper
Full-text available
The recent development of the persistent scatterers interferometry techniques (PSI) allow to measure ground deformations on wide areas with millimetric precision. These techniques show excellent results in the monitoring of subsidence or uplift in urban areas where the SAR data provides high density of measurements. Many ground oscillations are us...
Article
Full-text available
In the present work, we show the case of Marina del Este resort, located in the southern Mediterranean coast of Spain (Costa del Sol). A medium-scale landslide has been recognized when the area was virgin. In 1977 started the initial works for urbanizing the area; later, buildings and facilities expanded uphill covering the landslide body. This cas...
Conference Paper
Full-text available
5 RESUMEN Ante la pregunta ¿Se comportan mejor los HAC ante ambientes agresivos que los HV? Esta investigación cuestiona la generalización sistemática y plantea si será necesaria una cantidad mínima de cemento para que las ventajas del afinamiento de poro junto con la reducción de áridos gruesos sean concluyentes en los casos en que el aporte de fi...
Conference Paper
Full-text available
Remote sensing techniques applied to multi-scale and multi-temporal geological process): The development of remote sensing techniques in the last years allowed to monitoring large portion of territory with relatively low cost. Many geological and environmental processes may be mapped, monitored and controlled by several type of remote sensing techn...
Conference Paper
Full-text available
The anthropic role in the slope stability, the case of the A-348 Road, Granada, Spain): Landslides are geological processes in which the man action could greatly influence the slope equilibrium, in a positive or negative way. In the present work, changes in the safety factor (FS) of numerous road cuttings in the A-348 road, located in a mountainous...
Conference Paper
Full-text available
To meet the targets for a Low Carbon Economy in 2050, all new and existing buildings will have to significantly reduce their energy consumption, and/or progressively transition towards low carbon energy supplies. Although the EPBD-" recast " has set targets for new buildings and future definition of " cost effective thresholds " for existing ones,...
Article
Full-text available
This study analyzes students’ perception of university institutions. According to empirical evidence obtained from a questionnaire on perception of university institutions performed at the University of Granada, Spain, university students show perceived acceptance that is institutional, academic, and personal. Students’ perceptions contain attitude...
Article
This study analyzes students’ perception of university institutions. According to empirical evidence obtained from a questionnaire on perception of university institutions performed at the University of Granada, Spain, university students show perceived acceptance that is institutional, academic, and personal. Students’ perceptions contain attitude...
Article
Full-text available
En este trabajo se presenta el caso del deslizamiento que afecta a la urbanización de Marina del Este, localizada en la costa mediterránea española (Costa del Sol). Analizamos la cinemática y características del deslizamiento utilizando diferentes herramientas y metodologías: análisis geomorfológico, interpretación de imágenes radar satelitales ENV...
Article
Full-text available
This work analyzes the mechanical behavior of the cores of three earth dams [Portillo, S. Clemente and F. Abellán (Spain)] built with marls. A total of 193 samples have been tested in which the concentration of carbonates covers a range of 5 % (F. Abellán) to 70 % (S. Clemente). From an engineering point of view the samples belong an interval to lo...
Article
Full-text available
A study of slope stability was made using a numerical simulation by the finite-element method at a point of National Road A-348 located in the municipality of Lanjarón (province of Granada, S Spain). The phyllites, schists, and micaschists in contact with carbonates that comprise the Alpujarride complex make this a medium prone to continuous landsl...
Article
Full-text available
The relationships between geotechnical parameters identified from tests of slake durability, swelling behaviour, soil dispersion, and consolidation, using samples of marls utilized to build impervious cores of Spanish dams, were analysed. The analyses have determined the incidence of the processes of internal erosion and piping, self-stability, str...
Chapter
Full-text available
El objetivo del proyecto es la mejora del aprendizaje de la asignatura Mecánica del Suelo y Rocas. Geotecnia de 2º curso del Grado en Ingeniería Civil mediante la resolución de problemas y el uso de las NTIC. Se han realizado las siguientes tareas: 1. Revisión de información y formación, 2. Selección de un conjunto representativo de problemas demos...
Article
Full-text available
The nucleation, propagation, and associated folding of ramp-flat-ramp normal faults were analyzed from field examples developed in a brittle/ductile multilayer sequence of the Huércal-Overa Basin (SE Spain). Gently dipping sandy silt layers, which display a low cohesive strength (C0 = 7 kPa, m = 34�), favor the development of extensional detachment...
Article
Full-text available
Granada and its metropolitan area lie on the eastern edge of a basin where the foothills rise into the adjacent Sierra Nevada (3,482 m). On the west the valley is bordered by several faulted, Quaternary-age alluvial fans and by dissected terraces of the Genil River. Landscape evolution from about Tortonian to Pleisto-cene time is reflected by relic...
Article
Full-text available
Las inestabilidades de ladera movilizadas a partir de superficies de deslizamiento de bajo buzamiento (<15º) han sido objeto de estudio durante los últimos años. Las propiedades resistentes de estas zonas son especialmente bajas, debido fundamentalmente al incremento de la presión en poro en estos materiales. Un rasgo significativo de estos movimie...
Article
The stress–strain behaviour of 135 samples of calcareous silt and clay soil, known as marl, from three quarries is presented and discussed in connection with its adjustment to a hyperbolic non-elastic constitutive model. The marl samples were classified and identified, following conventional soil-mechanics procedures and tested under triaxial CU (c...
Article
Because of the influence of carbonates on the geotechnical properties of foundation and construction materials in civil engineering, a simple, precise, and inexpensive method of determining soil-carbonate content is needed. A large number of methods exist to determine the carbonate content in soils; but, for diverse reasons (precision (accuracy), c...
Book
Full-text available
Desde 1989 el Area de Ingeniería del Terreno de la Universidad de Granada ha venido proporcionando los protocolos para la realización de prácticas y ensayos de mecánica de suelos a los alumnos de las asignaturas que requieren tales contenidos. Las asignaturas interesadas son: ETS Ingenieros de Caminos, Canales y Puertos: Mecánica de Suelos y Rocas...
Article
Fine-grained, more or less cohesive carbonate materials are extremely widespread in terms of surface area and are, therefore, commonly used as materials to construct impermeable cores for dams. However, it has not been adequately documented whether the carbonate content in fine-grained soils significantly affects their engineering behaviour. The pr...
Article
Full-text available
The analysis of samples taken from the Neogene and Cretaceous marly series of the Granada and Guadix basins (south east Spain) shows an inverse correlation between the clay content and the residual friction angle. It has been verified that the carbonate fraction of the soil has a significant influence on the residual friction angle; there is a thre...
Article
Full-text available
In order to characterise the influence of the heavyrains on the observed landslides during the 1996–1997hydrological cycle, rainfall records for the last 100years are analysed from 104 stations in easternAndalusia. Regarding the amounts of rain recordedbetween October 1996 and March 1997 in the 104stations studied, 31 presented new all-time records...
Conference Paper
After a period of years with annual average amount of rainfall below the long term annual average during which few cases of naturally triggered landslides were recorded, the rainy season of 1996/97 gave place to new historical records in wide areas of the Betic Cordillera (Southern Spain). These heavy rains led to partial reactivation of many old l...
Article
Analysis of 171 samples taken from the Neogene cohesive soils of the Southeastern edge of the Granada basin shows inverse correlation between carbonate content and dispersion index and swelling behaviour and direct correlations between carbonate content and shear strength. This paper shows that carbonate content and clay fraction activity have a gr...
Article
A numerical model for devolatilisation of a single coal particle was used to estimate the heating rates of coal particle sizes fed to atmospheric-pressure industrial fluidised bed combustors. This model incorporates an appropriate level of detail for each of the processes occurring during the devolatilisation: external heat transfer, internal heat...

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