Ecological Engineering & Environmental Technology, Dec 31, 2023
This paper illustrates the importance of integrating buried stormwater ponds into underground dev... more This paper illustrates the importance of integrating buried stormwater ponds into underground development plans using a multi-criteria analysis and modeling for the selection of support in urban underground constructions, applied to the case study of buried stormwater ponds. This study underlines the importance of careful planning and the use of the technique for order of preference by similarity to ideal solution (TOPSIS) in the selection of support for underground stormwater basins in urban environments. The TOPSIS method led to the selection of diaphragm walls as the optimum solution, illustrating its effectiveness in evaluating alternatives based on a variety of criteria. diaphragm wall modeling using robot structural analysis (RSA) software validated this choice and accurately predicted the structure's behavior, underlining the importance of numerical tools in engineering decision-making. The analysis of wall displacements, carried out using these tools, confirmed their compliance with standards, validating the choice of cast walls and highlighting the need for continuous monitoring to guarantee the stability of the structures.
HAL (Le Centre pour la Communication Scientifique Directe), Apr 5, 2018
HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
International Journal on Advanced Science, Engineering and Information Technology, Nov 3, 2022
Understanding the project environment is essential in managing the works and controlling the risk... more Understanding the project environment is essential in managing the works and controlling the risks associated with deep excavations in urban areas. The study was carried out on 33 risks related to the project site (SR) and the company (CR). The projects concerned are located in the Casablanca region. A structured survey questionnaire was sent to 100 project managers, researchers, and construction management experts to attract relevant data, which resulted in a relatively high response rate of 54%. This paper applies the principal component analysis (PCA) method to reduce the original data variables and identify risk factors associated with deep excavations. Spearman rank correlation tests show a good consensus among respondents to corroborate the results further. The PCA results in four principal factors (SR) accounting for 68% of the variance explained. Site geology, geotechnics, and hydrogeology account for 32% of the environmental and social impacts of excavation (17%), natural hazards (10%), and proximity to existing structures (8%). Moreover, four main factors (CR) explain about 72% of all the factors analyzed; non-security of the works (32%), non-quality of project staff (18%), project cost overrun (14%), and non-quality of excavation works (9%). These results are useful for critical thinking in planning excavation projects in urban areas. This study provides the urban development community with valuable information to reassess risk factors and realign project management strategies to ensure the quality and safety of deep excavations.
Situe dans le grand bassin des Oulad Abdoun, le gisement de Sidi Chennane a ete retenu pour prend... more Situe dans le grand bassin des Oulad Abdoun, le gisement de Sidi Chennane a ete retenu pour prendre la releve du gisement du Grand Daoui. Ce gisement phosphatier presente des discontinuites appelees communement « derangements » qui affectent totalement et/ou partiellement la succession habituelle de la serie phosphatee. Steriles, generalement tres durs et detectables uniquement lors de la foration, ces « derangements » ainsi definis perturbent considerablement les chaines cinematiques d'exploitation tout en biaisant les calculs de reserve . Les methodes directes telles les coupes de puits et les indices de surface (comme les lambeaux de dalle a thersitees) se sont averees insuffisantes et non adaptees pour la reconnaissance de ces discontinuites. Les transformations chimiques operees au niveau du « derangement » couplees a l'examen des lithofacies, a la teneur en argiles et a la durete de celui-ci, attestent de l'existence d'un contraste de resistivite electrique entre la serie phosphatee normale de resistivite comprise entre 80 et 150 Ώm et les « derangements » de resistivite superieure a 200 Ώm pouvant atteindre les 1000 Ώm. Dans ce contexte specifique, a la demande du Groupe Office Cherifien des Phosphates une campagne geophysique de prospection electrique en courant continu a ete realisee. Couvrant un panneau de 50 ha, cette etude pilote avait pour objectif de cartographier et de delimiter en surface les zones anomaliques correspondant aux « derangements ». Trois cartes de resistivite ont ainsi ete realisees avec un dispositif Schlumberger afin de circonscrire les zones anomaliques. Les longueurs de ligne AB=40m, AB=80m et AB=120m ont ete utilisees pour cibler des « derangements » situes sur des profondeurs moyennes comprises entre 15 et 40 m. Les mesures de resistivite ont ete realisees avec un RESISTIVIMETRE SYSCAL2 DE BRGM-INSTRUMENTS aux nœuds d' une maille de dimensions 20x5 m. Les cartes de resistivites ont ete dressees avec le logiciel Surfer(Win32) V.6.04 de Golden Sofware. L'analyse et l'interpretation des cartes de resistivite permettent d'optimiser le calcul des reserves. Journal des Sciences Pour l'Ingenieur Vol. 6, 2006: 1-10
The phenomenon of water erosion induced by runoff speeds at the surface of the embankments causes... more The phenomenon of water erosion induced by runoff speeds at the surface of the embankments causes their instability. Particularly in road environments, gullying on the slope's surface due to runoffs causes landslides, which in turn cause considerable damage and consequent disorders to the road network. The aim of this research is to put in place a new technology for superficial water drainage on slope surfaces. Our study has developed a methodology involving the change of the geometric configuration of the water flow, aiming at velocity control of the flows by choosing slanting waterways with small slopes coupled to vertical drains. A modelling of the proposed solution will evaluate its effectiveness as to prevent the erosive factor and to identify other factors that are responsible for slope disorders.
International journal of recent technology and engineering, Nov 30, 2019
In the last decades, the world population rate has been gradually increasing, this population gro... more In the last decades, the world population rate has been gradually increasing, this population growth has faced intense urban expansion and the rapid development of the agricultural and industrial sectors. This change had an impact on the mode of land use. In the face of this problem, several strategies have been created for monitoring and predicting possible future scenarios on rhythm of land use change. The CA-Markov model used in this research allows to predict future land use trends on the basis of the classified maps of 1987, 1999, 2011 and 2019. Simulating and tracking these maps is a major challenge. The latter provides important information in terms of data, methods and models to be used to create a realistic and sustainable process of territory planning for environmentalists, planners and local authorities. The combination of the Markov chain and cellular automata has been used to qualitatively and quantitatively simulate and evaluate future land use trends in coastal Chaouia, Morocco. To achieve this purpose, two maps were developed for the two years of 2027 and 2035. By using kappa, the global success of the modelling was 89.22% and 82.12% respectively in 2011 and 2019 for the projected land use map. The results confirm that forests have been affected by intensive agricultural uses. This increase in agricultural use is due to the impact of the constant increase in the development of the agroeconomic and demographic sectors. This situation indicates the need to create new approach to management to protect the sustainability of land use in coastal Chaouia.
Landslide is a natural phenomenon that poses a threat and danger to humans due to the amount of d... more Landslide is a natural phenomenon that poses a threat and danger to humans due to the amount of damage it can cause and the different factors that can trigger it. The watershed of Oued Laou, Morocco, a part of the central Rifaine mountain chain, is a basin that is highly threatened by landslides as it is characterized by rugged terrain with steep slopes (25%) and significant height differences. The study and prevention of this phenomenon in the area is not easy as it requires a large amount of data and access to areas whose topography is difficult. The present study therefore employs a combination of conventional statistical methods and modern digital technologies using the analytic hierarchy process and geographic information system to enable mapping of landslide susceptibility zones in the area.
From several case studies around the world, it is well known that the binder represents the major... more From several case studies around the world, it is well known that the binder represents the major part of backfilling operation cost. Therefore, in the case of Imiter operation, research were mainly focused on the optimization of binder content. To this end, the definition of the physical and chemical properties of the future formula ingredients, specifically: tailings, waste material and hydraulic binder, was necessary. Analytical verifications were conducted to predict the UCB mechanical strength according to the defined underground functions and delivery network. Experimental testing, including: uniaxial compression, Immediate Bearing Index (IBI) and slump test, were then conducted to evaluate the possibility of reaching the required strength with the selected materials. The obtained results show that the tailings and mining wastes can be used as backfilling material with a specific binder content depending on each underground application. The followed approach can be applied for a prefeasibility evaluation for a backfilling facility.
The deformation and failure mechanisms on slopes and in particular the excavations, are very comp... more The deformation and failure mechanisms on slopes and in particular the excavations, are very complex. Slope stability analysis is performed using two types of methods: analytical and numerical, which are compared in this article to evaluate their efficiency. The excavation object of this study is situated on the high-speed line between Kenitra and Tangier, specifically in the rural commune of Hjar Nhal, Tangier-Tetouan-Al Hoceima region. It extends for a 1170 m length, its maximum height is 62 m at the axis. The soil of the site is characterized by pelitic formations with the existence of numerous water sources at the base of the excavation. Modelling by analytical methods showed that the excavation did not present a stability problem, contrary to numerical modelling. Firstly, the analysis of the results shows that before the failure, the soil is continuous and that its behaviour cannot be analysed by analytical methods, because a fracture surface cannot be established. It is then necessary to consider numerical methods that take into account the entire volume to analyze the movements and their evolution over time. Secondly, hypotheses have been made about the possibility of a poor estimation of the mechanical characteristics of the soils that constitute the excavation. The review of geotechnical investigations has shown that these soils are coarse with discontinuities that favour water infiltration, and are difficult to characterize, which can lead to an overestimation of their mechanical characteristics.
The Eastern High Atlas (Morocco) contains a variety of rocks with different magnetic susceptibili... more The Eastern High Atlas (Morocco) contains a variety of rocks with different magnetic susceptibility, among these rocks are those which constitute the Proterozoic and Paleozoic basement of the plain of Tamlelt which is the study area. This work is devoted to the analysis and interpretation of the main magnetic anomalies using the Oisis Montaj program, and the correlation using ArcGis software, from the main « magnetic facies» detected, to the main geological formations affecting the geological basement, highlighted in the plain of Tamlelt. The map of the residual magnetic field shows elongated magnetic anomalies in the direction E-W and NE-SW. the reduction to the pole shows at the level of the plain of Tamlelt a large anomaly elongated in the direction E-W then in the direction NW-SE. The transformation of Tilt Angle allowed to delimit the anomalies of low or high amplitude that limit the shallow structures. The quantitative interpretation of the main magnetic anomalies highlighted in the study area has made it possible to characterize the deep structure of the magnetic bodies, which could contain sulphide clusters, according to the geological and mining context of the studied area.
Program with Abstracts - Geological Association of Canada(Mineralogical Association of Canada(Canadian Geophysical Union, Joint Annual Meeting, Feb 6, 1998
Vibro-compaction is a recent technique for treating soils in the mass, thus improving its mediocr... more Vibro-compaction is a recent technique for treating soils in the mass, thus improving its mediocre geo mechanical properties. In addition, this treatment makes it possible to minimize the risk of liquefaction, it is closely linked to the grain size of the soil to be treated. The soil underlying the construction project of the port of Nador in Morocco requires treatment to improve its characteristics and in particular to minimize the risk of liquefaction, given that Morocco is in a collision zone, near the border between the two African-Eurasian plates that are seismically active (earthquake in the city of Al Hoceima in 2004 in Morocco). The purpose of this work is to test the different parameters of vibro-compaction (mesh, vibration frequency, height of passes, duration of compaction) necessary to obtain the objectives set for the work (relative density ≥ 77 %), through the carrying out of an embarkation test on the substitute sands of the main breakwater of this Port. The in situ c...
International Journal of Innovative Research and Scientific Studies
Several processes allow the improvement of soils such as vibrocompaction, stony columns, static h... more Several processes allow the improvement of soils such as vibrocompaction, stony columns, static horizontal compaction etc. These processes reduce the risk of liquefaction potential and making it possible to build on this type of soil when the space restriction require it. Stone columns are a recognized method of soil improvement, which consists of creating large diameter columns using special vibrators with granular filling materials introduced into the ground. The objective of this work is to evaluate the effectiveness of stone columns, made in a seismic zone containing liquefiable materials, with regards to the reduction of the risk of liquefaction and the improvement of the bearing capacity of the soil. The approach followed is the exploitation of geotechnical investigation tests (CPT Cone Penetration Test), (SPT: Cone Penetration Test, (pressuremeter tests), carried out before and after soil treatment. This study showed that the network of gravelled columns produces an enhanced ...
International Journal of Innovative Research and Scientific Studies
During earthquakes, the shear strength and bearing capacity of saturated sandy soils decreases; t... more During earthquakes, the shear strength and bearing capacity of saturated sandy soils decreases; this is related to an increase in pore pressure. In the ultimate state, the pore pressure becomes equal to the initial effective stress, at which time the material loses all its resistance and liquefaction occurs. Thus, the prediction of the post-liquefaction settlement of the soil is an important step to reduce the seismic risk. Several methods have been developed for the prediction of Seismic-Induced Settlement, the most widely used is that based on the results of in-situ tests SPT, and Several soil reinforcement techniques can be considered, the choice depends mainly on the grain size of the soil to be treated. This article presents a comparative study of the methods for evaluating Seismic-Induced Settlement based on the experimental results of the in situ SPT tests, applied to an earthquake-prone area in northern Morocco which had specific soil formations characterized by the existenc...
Ecological Engineering & Environmental Technology, Dec 31, 2023
This paper illustrates the importance of integrating buried stormwater ponds into underground dev... more This paper illustrates the importance of integrating buried stormwater ponds into underground development plans using a multi-criteria analysis and modeling for the selection of support in urban underground constructions, applied to the case study of buried stormwater ponds. This study underlines the importance of careful planning and the use of the technique for order of preference by similarity to ideal solution (TOPSIS) in the selection of support for underground stormwater basins in urban environments. The TOPSIS method led to the selection of diaphragm walls as the optimum solution, illustrating its effectiveness in evaluating alternatives based on a variety of criteria. diaphragm wall modeling using robot structural analysis (RSA) software validated this choice and accurately predicted the structure's behavior, underlining the importance of numerical tools in engineering decision-making. The analysis of wall displacements, carried out using these tools, confirmed their compliance with standards, validating the choice of cast walls and highlighting the need for continuous monitoring to guarantee the stability of the structures.
HAL (Le Centre pour la Communication Scientifique Directe), Apr 5, 2018
HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
International Journal on Advanced Science, Engineering and Information Technology, Nov 3, 2022
Understanding the project environment is essential in managing the works and controlling the risk... more Understanding the project environment is essential in managing the works and controlling the risks associated with deep excavations in urban areas. The study was carried out on 33 risks related to the project site (SR) and the company (CR). The projects concerned are located in the Casablanca region. A structured survey questionnaire was sent to 100 project managers, researchers, and construction management experts to attract relevant data, which resulted in a relatively high response rate of 54%. This paper applies the principal component analysis (PCA) method to reduce the original data variables and identify risk factors associated with deep excavations. Spearman rank correlation tests show a good consensus among respondents to corroborate the results further. The PCA results in four principal factors (SR) accounting for 68% of the variance explained. Site geology, geotechnics, and hydrogeology account for 32% of the environmental and social impacts of excavation (17%), natural hazards (10%), and proximity to existing structures (8%). Moreover, four main factors (CR) explain about 72% of all the factors analyzed; non-security of the works (32%), non-quality of project staff (18%), project cost overrun (14%), and non-quality of excavation works (9%). These results are useful for critical thinking in planning excavation projects in urban areas. This study provides the urban development community with valuable information to reassess risk factors and realign project management strategies to ensure the quality and safety of deep excavations.
Situe dans le grand bassin des Oulad Abdoun, le gisement de Sidi Chennane a ete retenu pour prend... more Situe dans le grand bassin des Oulad Abdoun, le gisement de Sidi Chennane a ete retenu pour prendre la releve du gisement du Grand Daoui. Ce gisement phosphatier presente des discontinuites appelees communement « derangements » qui affectent totalement et/ou partiellement la succession habituelle de la serie phosphatee. Steriles, generalement tres durs et detectables uniquement lors de la foration, ces « derangements » ainsi definis perturbent considerablement les chaines cinematiques d'exploitation tout en biaisant les calculs de reserve . Les methodes directes telles les coupes de puits et les indices de surface (comme les lambeaux de dalle a thersitees) se sont averees insuffisantes et non adaptees pour la reconnaissance de ces discontinuites. Les transformations chimiques operees au niveau du « derangement » couplees a l'examen des lithofacies, a la teneur en argiles et a la durete de celui-ci, attestent de l'existence d'un contraste de resistivite electrique entre la serie phosphatee normale de resistivite comprise entre 80 et 150 Ώm et les « derangements » de resistivite superieure a 200 Ώm pouvant atteindre les 1000 Ώm. Dans ce contexte specifique, a la demande du Groupe Office Cherifien des Phosphates une campagne geophysique de prospection electrique en courant continu a ete realisee. Couvrant un panneau de 50 ha, cette etude pilote avait pour objectif de cartographier et de delimiter en surface les zones anomaliques correspondant aux « derangements ». Trois cartes de resistivite ont ainsi ete realisees avec un dispositif Schlumberger afin de circonscrire les zones anomaliques. Les longueurs de ligne AB=40m, AB=80m et AB=120m ont ete utilisees pour cibler des « derangements » situes sur des profondeurs moyennes comprises entre 15 et 40 m. Les mesures de resistivite ont ete realisees avec un RESISTIVIMETRE SYSCAL2 DE BRGM-INSTRUMENTS aux nœuds d' une maille de dimensions 20x5 m. Les cartes de resistivites ont ete dressees avec le logiciel Surfer(Win32) V.6.04 de Golden Sofware. L'analyse et l'interpretation des cartes de resistivite permettent d'optimiser le calcul des reserves. Journal des Sciences Pour l'Ingenieur Vol. 6, 2006: 1-10
The phenomenon of water erosion induced by runoff speeds at the surface of the embankments causes... more The phenomenon of water erosion induced by runoff speeds at the surface of the embankments causes their instability. Particularly in road environments, gullying on the slope's surface due to runoffs causes landslides, which in turn cause considerable damage and consequent disorders to the road network. The aim of this research is to put in place a new technology for superficial water drainage on slope surfaces. Our study has developed a methodology involving the change of the geometric configuration of the water flow, aiming at velocity control of the flows by choosing slanting waterways with small slopes coupled to vertical drains. A modelling of the proposed solution will evaluate its effectiveness as to prevent the erosive factor and to identify other factors that are responsible for slope disorders.
International journal of recent technology and engineering, Nov 30, 2019
In the last decades, the world population rate has been gradually increasing, this population gro... more In the last decades, the world population rate has been gradually increasing, this population growth has faced intense urban expansion and the rapid development of the agricultural and industrial sectors. This change had an impact on the mode of land use. In the face of this problem, several strategies have been created for monitoring and predicting possible future scenarios on rhythm of land use change. The CA-Markov model used in this research allows to predict future land use trends on the basis of the classified maps of 1987, 1999, 2011 and 2019. Simulating and tracking these maps is a major challenge. The latter provides important information in terms of data, methods and models to be used to create a realistic and sustainable process of territory planning for environmentalists, planners and local authorities. The combination of the Markov chain and cellular automata has been used to qualitatively and quantitatively simulate and evaluate future land use trends in coastal Chaouia, Morocco. To achieve this purpose, two maps were developed for the two years of 2027 and 2035. By using kappa, the global success of the modelling was 89.22% and 82.12% respectively in 2011 and 2019 for the projected land use map. The results confirm that forests have been affected by intensive agricultural uses. This increase in agricultural use is due to the impact of the constant increase in the development of the agroeconomic and demographic sectors. This situation indicates the need to create new approach to management to protect the sustainability of land use in coastal Chaouia.
Landslide is a natural phenomenon that poses a threat and danger to humans due to the amount of d... more Landslide is a natural phenomenon that poses a threat and danger to humans due to the amount of damage it can cause and the different factors that can trigger it. The watershed of Oued Laou, Morocco, a part of the central Rifaine mountain chain, is a basin that is highly threatened by landslides as it is characterized by rugged terrain with steep slopes (25%) and significant height differences. The study and prevention of this phenomenon in the area is not easy as it requires a large amount of data and access to areas whose topography is difficult. The present study therefore employs a combination of conventional statistical methods and modern digital technologies using the analytic hierarchy process and geographic information system to enable mapping of landslide susceptibility zones in the area.
From several case studies around the world, it is well known that the binder represents the major... more From several case studies around the world, it is well known that the binder represents the major part of backfilling operation cost. Therefore, in the case of Imiter operation, research were mainly focused on the optimization of binder content. To this end, the definition of the physical and chemical properties of the future formula ingredients, specifically: tailings, waste material and hydraulic binder, was necessary. Analytical verifications were conducted to predict the UCB mechanical strength according to the defined underground functions and delivery network. Experimental testing, including: uniaxial compression, Immediate Bearing Index (IBI) and slump test, were then conducted to evaluate the possibility of reaching the required strength with the selected materials. The obtained results show that the tailings and mining wastes can be used as backfilling material with a specific binder content depending on each underground application. The followed approach can be applied for a prefeasibility evaluation for a backfilling facility.
The deformation and failure mechanisms on slopes and in particular the excavations, are very comp... more The deformation and failure mechanisms on slopes and in particular the excavations, are very complex. Slope stability analysis is performed using two types of methods: analytical and numerical, which are compared in this article to evaluate their efficiency. The excavation object of this study is situated on the high-speed line between Kenitra and Tangier, specifically in the rural commune of Hjar Nhal, Tangier-Tetouan-Al Hoceima region. It extends for a 1170 m length, its maximum height is 62 m at the axis. The soil of the site is characterized by pelitic formations with the existence of numerous water sources at the base of the excavation. Modelling by analytical methods showed that the excavation did not present a stability problem, contrary to numerical modelling. Firstly, the analysis of the results shows that before the failure, the soil is continuous and that its behaviour cannot be analysed by analytical methods, because a fracture surface cannot be established. It is then necessary to consider numerical methods that take into account the entire volume to analyze the movements and their evolution over time. Secondly, hypotheses have been made about the possibility of a poor estimation of the mechanical characteristics of the soils that constitute the excavation. The review of geotechnical investigations has shown that these soils are coarse with discontinuities that favour water infiltration, and are difficult to characterize, which can lead to an overestimation of their mechanical characteristics.
The Eastern High Atlas (Morocco) contains a variety of rocks with different magnetic susceptibili... more The Eastern High Atlas (Morocco) contains a variety of rocks with different magnetic susceptibility, among these rocks are those which constitute the Proterozoic and Paleozoic basement of the plain of Tamlelt which is the study area. This work is devoted to the analysis and interpretation of the main magnetic anomalies using the Oisis Montaj program, and the correlation using ArcGis software, from the main « magnetic facies» detected, to the main geological formations affecting the geological basement, highlighted in the plain of Tamlelt. The map of the residual magnetic field shows elongated magnetic anomalies in the direction E-W and NE-SW. the reduction to the pole shows at the level of the plain of Tamlelt a large anomaly elongated in the direction E-W then in the direction NW-SE. The transformation of Tilt Angle allowed to delimit the anomalies of low or high amplitude that limit the shallow structures. The quantitative interpretation of the main magnetic anomalies highlighted in the study area has made it possible to characterize the deep structure of the magnetic bodies, which could contain sulphide clusters, according to the geological and mining context of the studied area.
Program with Abstracts - Geological Association of Canada(Mineralogical Association of Canada(Canadian Geophysical Union, Joint Annual Meeting, Feb 6, 1998
Vibro-compaction is a recent technique for treating soils in the mass, thus improving its mediocr... more Vibro-compaction is a recent technique for treating soils in the mass, thus improving its mediocre geo mechanical properties. In addition, this treatment makes it possible to minimize the risk of liquefaction, it is closely linked to the grain size of the soil to be treated. The soil underlying the construction project of the port of Nador in Morocco requires treatment to improve its characteristics and in particular to minimize the risk of liquefaction, given that Morocco is in a collision zone, near the border between the two African-Eurasian plates that are seismically active (earthquake in the city of Al Hoceima in 2004 in Morocco). The purpose of this work is to test the different parameters of vibro-compaction (mesh, vibration frequency, height of passes, duration of compaction) necessary to obtain the objectives set for the work (relative density ≥ 77 %), through the carrying out of an embarkation test on the substitute sands of the main breakwater of this Port. The in situ c...
International Journal of Innovative Research and Scientific Studies
Several processes allow the improvement of soils such as vibrocompaction, stony columns, static h... more Several processes allow the improvement of soils such as vibrocompaction, stony columns, static horizontal compaction etc. These processes reduce the risk of liquefaction potential and making it possible to build on this type of soil when the space restriction require it. Stone columns are a recognized method of soil improvement, which consists of creating large diameter columns using special vibrators with granular filling materials introduced into the ground. The objective of this work is to evaluate the effectiveness of stone columns, made in a seismic zone containing liquefiable materials, with regards to the reduction of the risk of liquefaction and the improvement of the bearing capacity of the soil. The approach followed is the exploitation of geotechnical investigation tests (CPT Cone Penetration Test), (SPT: Cone Penetration Test, (pressuremeter tests), carried out before and after soil treatment. This study showed that the network of gravelled columns produces an enhanced ...
International Journal of Innovative Research and Scientific Studies
During earthquakes, the shear strength and bearing capacity of saturated sandy soils decreases; t... more During earthquakes, the shear strength and bearing capacity of saturated sandy soils decreases; this is related to an increase in pore pressure. In the ultimate state, the pore pressure becomes equal to the initial effective stress, at which time the material loses all its resistance and liquefaction occurs. Thus, the prediction of the post-liquefaction settlement of the soil is an important step to reduce the seismic risk. Several methods have been developed for the prediction of Seismic-Induced Settlement, the most widely used is that based on the results of in-situ tests SPT, and Several soil reinforcement techniques can be considered, the choice depends mainly on the grain size of the soil to be treated. This article presents a comparative study of the methods for evaluating Seismic-Induced Settlement based on the experimental results of the in situ SPT tests, applied to an earthquake-prone area in northern Morocco which had specific soil formations characterized by the existenc...
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