Jacques Monnet

Jacques Monnet
Gaiatech

PhD

About

114
Publications
22,893
Reads
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329
Citations
Additional affiliations
January 2014 - present
Gaiatech
Position
  • Manager
October 1982 - December 2013
University Joseph Fourier - Grenoble 1
Position
  • Professor (Associate)
Education
January 1971 - July 1977
September 1969 - July 1983
Claude Bernard University Lyon 1
Field of study
  • Civil Engineering
September 1965 - July 1969
Claude Bernard University Lyon 1
Field of study
  • Civil Engineering

Publications

Publications (114)
Conference Paper
Full-text available
La présente étude porte sur la détermination des erreurs admissibles sur les les paramètres issus de l'essai pressiomètrique (E M , p LM), pour une meilleure estimation de la précision de la conception des fondations. La théorie des erreurs est utilisée et l'influence de la précision des mesures sur les résultats pressiométrique est indiquée. ABSTR...
Conference Paper
Full-text available
La présente étude traite d'un modèle théorique de courbe de rétention basé sur l'arrangement de particules sphériques élastiques. Cette approche physique permet d'expliquer et de calculer les courbes avec un nombre limité de paramètres expérimentaux ayant une signification physique. Une application du modèle au limon de livet-Gavet compacté à l'opt...
Conference Paper
Full-text available
L'essai pressiométrique en condition Non Drainée est souvent interprété en contrainte totale ce qui ne permet pas d'atteindre les caractéristiques mécaniques fondamentales du sol. L'article considère l'essai en condition Non Saturé Non Drainé et prend en compte l'effet de la succion ou de la surpression interstitielle pour une meilleure interprétat...
Conference Paper
Full-text available
Different approaches have been used for modeling retention curves. The experimental correlation was first proposed [1-3]. The physical modeling of unsaturated soils is used for this study. The shape of the retention curve is a consequence of physical assumptions. The paper presents a theoretical model based on elastic spherical particle arrangement...
Conference Paper
Full-text available
Les ouvrages en terre sont compactés à l'optimum Proctor avec un degré de saturation entre 80 et 98% et nécessitent le développement d'un modèle théorique capable de simuler les chemins de séchage et d'humidification. L'approche proposée est une modélisation physique des sols non saturés. La forme de la courbe de rétention est alors une conséquence...
Conference Paper
Full-text available
Les ouvrages en terre sont compactés à l'optimum Proctor avec un degré de saturation entre 80 et 98% et nécessitent le développement d'un modèle théorique capable de simuler les chemins de séchage et d'humidification. L'approche proposée est une modélisation physique des sols non saturés. La forme de la courbe de rétention est alors une conséquence...
Article
The present study is focused on a theoretical model of unsaturated soil based on elastic spherical particle arrangement, which can be considered to be a simplified DEM method. The model is presented with a large graded soil.. This approach follows a new research method so that the physical phenomena are explained and the number of experimental para...
Article
The present study focuses on a theoretical model for unsaturated soils based on elastic spherical particle arrangement, which can be considered to be a simplified Discrete Element Method. As a first step, a uniform model is introduced with a single soil particle diameter. This approach follows a new research methodology so that the physical relatio...
Conference Paper
Full-text available
Modelling the relation between the degree of saturation and the suction (ie retention curve) is an important challenge for geotechnical engineering. It has a huge influence on the behavior of large soil constructions as levees, embankments, road earthworks. We present here a theoretical model of retention curve which considers physical relations of...
Conference Paper
Full-text available
The present research is funded by the French National Project « TerreDurable », which is dedicated to the study of soils in quasi-saturated conditions (close to saturation) for the analysis of stability and settlement of earth structures such as embankment, dams. A global presentation of the drying-wetting test shows the volume change, air entry an...
Conference Paper
Full-text available
Le développement des outils numériques et la montée en puissance des micro-ordinateurs permettent de déterminer le comportement des grands ouvrages de terrassement comme les barrages, les digues, les excavations et remblais routiers ou ferroviaires. Tous ces ouvrages sont compactés dans un état proche de l'optimum Proctor avec un degré de saturatio...
Conference Paper
Full-text available
Ce modèle de courbe de rétention utilise les relations physiques des sols non saturés. Avec cette approche, il n'y a pas besoin de supposer des formes particulières de la courbe de rétention, qui est une conséquence des hypothèses physiques. La présente étude utilise un modèle théorique basé sur l'arrangement de particule sphérique élastique. Elle...
Chapter
The Pressuremeter Menard Test (PMT) consists of inflating a dilatable probe in a borehole and linking the pressure of the inflation to a measurement of the deformability of the soil, the pressuremeter modulus EM and a measurement of the pressure limit PLM. The self-drilling pressuremeter test (SBP) is an improvement of the M?nard probe. In this tes...
Chapter
There are several types of penetrometers available. These include the static penetrometer (SP), which is inserted using a system of jacks; the dynamic penetrometer, which is inserted by pile driving; the dynamic-static penetrometer (DCPT); and the piezocone (CPTU), which measures the cone effort and the interstitial pressure on advancement. The sta...
Chapter
The study of soil stratification is a necessary geotechnical step for the characterization of the site through the identification of soil layers and their horizontal limits. The drilling tool can be considered a variation of the penetrometer for which the pressure on the tool provides information with regard to the resistance to penetration, and th...
Chapter
The Marchetti flat dilatometer is a normalized test that provides an estimate of the settlement of foundations and coefficient K0 of the soil. Other applications being developed involve compacting control systems, detecting sliding surfaces on slopes, soil liquefaction, deformation of laterally loaded piles and other geotechnical problems by using...
Chapter
This chapter discusses various static loading tests, focusing first on the two types of plate loading tests, namely low-pressure loading test to determine the soil's stiffness, and high-pressure loading test to determine the safety coefficient related to the limit load. The low-pressure loading test consists of applying a supposedly even pressure t...
Chapter
This chapter discusses the various rock and soil sampling techniques and the procedures followed. Sampling techniques must be selected according to the soil to be tested. They use several methods: wells, trenches, excavation and tunnels (mechanically or manually dug); manual drilling (done by hand with an auger); punch drilling, and rotation drilli...
Chapter
For measuring water content and density, this chapter discusses the sample collection method, and method without sample collection. The frying pan method of measuring water content is carried out on site. The oven-dry method is carried out in a laboratory and is subject to a standard. Measuring dry density using a membrane densitometer is carried o...
Chapter
To deal with problems such as stability of installations exposed to water, design of catching constructions, preliminary estimate of drainage flows, impact of catchments works, and long-term evolution of a catchment, in situ water tests are carried out. Punctual water tests include single or double ring infiltrometer tests, the Lefranc permeability...
Chapter
In projects of civil engineering, it is necessary to know the shearing characteristics of the soil in place. It is not always possible to recover intact samples and analyze them in the laboratory. It is, therefore, necessary to carry out tests in situ to determine the shear characteristics that are essential for the project. In the direct shear box...
Chapter
Topographic measurements are used to appraise landslides, the movement and settling of buildings, etc. This chapter highlights the different techniques used in topographic measurements. Comparing a point's coordinates (X, Y, Z) at different times indicates the point's movement. Points are identified on the ground's surface using a sight or a rod eq...
Chapter
Measuring the total pressure in the ground is done through the intermediate of a pressure sensor buried in the ground, which transfers the required information to the surface. Deformation measuring systems are based on various principles, such as mechanical, hydraulic, acoustic, capacitive, inductive, and piezoelectric. Interstitial pressure is mea...
Conference Paper
Full-text available
RESUME: L’érosion interne est le déplacement des particules fines d'un sol sous l'action d'un écoulement souterrain. Ce mécanisme pourrait être à l'origine des dommages sur les remblais et les barrages en terre. En conséquence, il est nécessaire de détecter les zones de faiblesse dans les digues, qui pourraient être un initiateur de rupture locale....
Conference Paper
Full-text available
Internal erosion is the displacement of the fine particles of a soil under the action of an internal flow. This mechanism could be at the origin of the damage on embankments and earth dams. It is necessary to detect the weak zones which could be the local site of a failure. It is also important to understand the phenomena of internal erosion. A new...
Conference Paper
Full-text available
RÉSUMÉ – Deux approches d'un essai de dessiccation sont menées : une expérimentale et une numérique. Les deux approches simultanées permettent d'observer l'évolution des caractéristiques hydriques et volumiques d'un matériau lors d'une dessiccation, et de comprendre les conditions favorables à l'apparition de fissures. Ces deux approches s'inscrive...
Conference Paper
Full-text available
The Geomechameter is a new in situ test using the forces generated by water flow around the probe. The hydraulic flow controls the level of the vertical stress at the test level. The apparatus is able to measure the soil mechanical shearing resistance (cohesion c and friction angle ), stiffness modulus (Young modulus E), the permeability (coeffici...
Conference Paper
Full-text available
The cluster analysis is a statistical method used for grouping data which have similar mathematical characteristics. We present here an analysis of pressuremeter tests using the Cluster method, which uses as the statistical variables: p LM ; E e ; E e /p LM . The results relate the relevance of these variables to identify the soil horizons, and to...
Conference Paper
Full-text available
Internal erosion is the displacement of the fine particles of a soil under the action of an internal flow. This mechanism could be at the origin of the damage on embankments and earth dams. It is necessary to detect the weak zones which could be the local site of a failure. It is also important to understand the phenomena of internal erosion. A new...
Data
L’érosion interne est le déplacement des particules fines d'un sol sous l'action d'un écoulement souterrain. Ce mécanisme pourrait être à l'origine des dommages sur les remblais et les barrages en terre. En conséquence, il est nécessaire de détecter les zones de faiblesse dans les digues, qui pourraient être un initiateur de rupture locale. Il est...
Poster
Laboratoire Sols, Solides, Structures-Risques Domaine Universitaire BP 53 38041 Grenoble Cedex 9 tél: 33(0)4 76 82 50 27 fax: 33(0)4 76 82 70 43 http://www.3sr. Essai d'Erosion Transverse (CET) Objectif-Démarche Erosion Interne • Mettre au point des outils pratiques pour diagnostiquer les risques d'érosion interne dans les digues, à travers une exp...
Article
Full-text available
Internal erosion is one of the main causes of instabilities within hydraulic earth structures. The occurrence of breach in new structures underlines the emergency to quantify phenomena induced. Over the years, several methods have been developed to characterize and model internal erosion. The intention of this paper is to present a new experimen...
Conference Paper
Full-text available
The slope creeping could be explained by the volume variation of the soil in relation with the variation of the water content. It can be observed that the shrinkage test carried out on an inclined plane, produce a deformation of the soil in the direction of the slope. A theoretical unsaturated soil model, which takes into account the 3 phases of th...
Conference Paper
Full-text available
Un nouvel appareil d’essai in situ, le Géomécamètre a été conçu et construit. Cette évolution du pressiomètre utilise les forces produites par un écoulement d'eau vertical descendant autour de la sonde de mesure pour générer un champ de gravité artificiel. Cet écoulement hydraulique permet de régler la contrainte effective verticale au niveau de la...
Conference Paper
Full-text available
A partir d’une interprétation théorique élasto-plastique avec dilatance de l’essai pressiométrique, l’article propose une classification des sols en frottement d’après les mesures adimensionnelles G e /p’ 0 (G e : module de cisaillement élastique ; p’ 0 pression horizontale des terres au repos) et p’ LM /p’ 0 (p’ LM pression limite conventionnell...
Conference Paper
Full-text available
In this paper, we present a summary of the measurements carried out for the diagnosis of the Isère and Drac river levees (20km) for the risk of suffusion. These measurements include geophysical surveys by electrical panel, pressuremeter tests, identification of the soil and test with a new in-situ experimental device The Cross Erosion Test (CET). T...
Article
Full-text available
A theoretical model of unsaturated soil is presented. It takes into account the three main components of the soil : the air; the water ; the soil particles. It uses the principle of effective stress on four different domains : unsaturated with the air in continuous phase (Domain D1), unsaturated with the air occluded in contact with the particles o...
Article
PROOFS The use of a cluster analysis in a Me´nard pressuremeter survey Cluster analysis is a statistical method used for grouping data that have similar mathematical characteristics in subsets with common or homogeneous values. This method can be used in various fields of data for which no division is known a priori and can be useful for identificati...
Conference Paper
The internal erosion of soil results from seepage flow. It appears to be the main cause of severe hydraulic failure for dikes alongside roads and railways. All around the world, 46% of embankments present a risk of internal erosion. Three main processes can be identified: backward erosion, concentrated leak and suf- fusion. Suffusion is the proce...
Conference Paper
Internal erosion is the displacement of fine particles of a soil under the action of an internal flow. These mechanisms could be at the origin of damage on embankments and earth dams. Risks are linked to the nature of the floods but also to the construction of the embankments devoid of monitoring system. Then, it is necessary to detect the weak...
Article
Full-text available
In this first paper, part I, we present the elasto-plastic theory for expansion of pressuremeters in granular soil. This theory allows determination of the behaviour of the granular soil around the pressuremeter with only four mechanical parameters. It is compared with previous theory on the dataset of the pressuremeter test on Ticino sand. In the...
Article
Full-text available
In the first paper, part I, we present the elasto-plastic theory for the expansion of the pressuremeter in granular soil. This theory allows to determine the behaviour of the granular soil around the pressuremeter with only four mechanical parameters. It is compared with previous theory on the data set of the pressuremeter test on Ticino sand. In t...
Data
A new in situ testing apparatus, the Geomechameter, has been designed and built. It is an evolution of the pressuremeter, using the forces generated by water flow around the measurement probe. The hydraulic flow allows to control the level of the vertical stress at the test level. The influence of this stress is taken into account in the interpreta...
Conference Paper
A new in situ testing apparatus, the Geomechameter, has been designed and built. It is an evolution of the pressuremeter, using the forces generated by water flow around the measurement probe. The hydraulic flow allows to control the level of the vertical stress at the test level. The influence of this stress is taken into account in the interpr...
Conference Paper
L’analyse par cluster est une méthode statistique utilisée pour regrouper les données en sous-ensemble homogène. Cette méthode peut être utilisée pour différents types de données pour lesquelles aucune division à priori n’est connue. Elle peut être utile dans le cas de l’identification des couches de sol, lors de reconnaissances géomécaniques....
Conference Paper
Full-text available
Les Terres Noires couvrent une superficie de plusieurs centaines de kilomètres carrés dans le Sud-Est de la France. Cette formation géologique se présente sous la forme d’une roche tendre finement stratifiée à l’état intact. Sa composition argilo-marneuse la rend très sensible à l’érosion et elle se dégrade rapidement en formant un sol composé...
Conference Paper
The cluster analysis is a statistical method used for grouping data which have similar math- ematical characteristics in subsets with common or homogeneous values. This method can be used in various fields for data of which no division is a priori known and can be useful in the case of the identification of soil horizons for site characterization...
Conference Paper
A new in situ testing apparatus, the Geomechameter, has been designed and built. It is an evolution of the pressuremeter, using the forces generated by water flow around the measurement probe. The hydraulic flow allows controlling the level of the vertical stress at the test level. The influence of this stress is taken into account in the interp...
Article
The internal erosion of soils results from seepage flow. These mechanisms are always at the origin of the damage of the embankments and earth dams. Risks are linked with the nature of the floods but also with the implementation of the embankments and means of monitoring often ineffective. It is then necessary to have good detection systems to local...
Conference Paper
Full-text available
The internal erosion of soils results from seepage flow. These mechanisms are always at the origin of the damage of the embankments and earth dams. Risks are linked with the nature of the floods but also with the implementation of the embankments and means of monitoring often ineffective. It is then necessary to have good detection systems to lo...
Conference Paper
Les Terres Noires couvrent une superficie de plusieurs centaines de kilomètres carrés dans le Sud-Est de la France. Cette forma-tion géologique se présente sous la forme d’une roche tendre finement stratifiée à l’état intact. Sa composition argilo-marneuse la rend très sensible à l’érosion et elle se dégrade rapidement en formant un sol composé de...
Article
Les tronçons de digue autour de Grenoble font l’objet d’une campagne de reconnaissances fondée sur l’utilisation d’une méthode géophysique à grand rendement, le panneau électrique. L’expérience montre que la détection de l’écoulement, des hétérogénéités, de la géométrie, de la nature des couches obtenue par l’analyse électrique, n’est pas toujours...
Article
Full-text available
Les tronçons de digue autour de Grenoble font l'’objet d’une campagne de reconnaissances fondée sur l’utilisation d’'une méthode géophysique à grand rendement, le panneau électrique. L'’expérience montre que la détection de l’'écoulement, des hétérogénéités, de la géométrie, de la nature des couches obtenue par l'analyse électrique, n’'est pas touj...
Article
An elastoplastic pressuremeter theory for cohesive soil has been used in the design of construction, such as retaining walls, slope stability, or foundation engineering. This theory takes into account the plasticity along the vertical and horizontal planes and allows for the determination of the conventional limit pressure. We compute here the conv...
Article
Full-text available
We present the theory used for the interpretation of the pressuremeter test in cohesive soil and its extension to the conventional limit pressure, which is defined as the pressure at the borehole wall for a volume increase ∆V equal to the initial volume of the borehole. This conventional limit pressure can be directly measured with the pressuremete...
Article
Full-text available
The recent elasto-plastic pressuremeter theory of Monnet and Khlif (1994) for the granular soil had been used in several civil engineering constructions. The finite element method allows nowadays to check the validity of this theory. In the first part, we briefly present the interpretation of the pressuremeter test in granular soil and the theoreti...
Article
Full-text available
The recent elasto-plastic pressuremeter theory of Monnet and Khlif (1994) for the granular soil had been used in several civil engineering constructions. The finite element method allows nowadays to check the validity of this theory. In the first part, we briefly present the interpretation of the pressuremeter test in granular soil and the theoreti...
Article
La Vitesse Imagée de Particules est une technique de mesure de vitesse qui a été développée à l'origine dans le domaine de la mécanique des fluides expérimentale. Cette méthode, a été modifiée pour être appliquée aux essais de géotechnique du laboratoire LIRIGM consacrés aux déplacements lents des pentes naturelles. Ces phénomènes ont été étudiésen...
Article
Full-text available
The tunnel's construction in urban area is a particularly sensitive problem due to the careful security requirements, which must be applied to prevent tunnel from failure and from large displacements and to avoid damage to existing buildings. The tunnel of the North Transversal Road of Grenoble begins from Sablon district, crosses under river Isère...
Article
Full-text available
The usual way to use a pressuremeter device is to measure a pressuremeter modulus, which is correlated with the elastic modulus, and a limit pressure, which is used to find the bearing capacity of the foundation. We present a new interpretation of the pressuremeter test, which allows the measurement of the elastic shear modulus by the application o...
Article
Full-text available
The Crozet bridge is located on the Grenoble-Col du Fau motorway, on the Grenoble-Sisteron route, 15 km south of Grenoble, France. It crosses a 350 m wide valley and the RN75 national road. The adaptation of the bridge into the landscape has involved an arch design with three bays (in the Grenoble-Sisteron direction) and one bay (in the Sisteron-Gr...
Article
Full-text available
Le viaduc du Crozet permet de franchir, par une structure en arc, un vallon peu encaissé emprunté par la route nationale RN75. Les appuis d’une telle structure sont particulièrement délicats à mettre en oeuvre car ils supportent un effort horizontal important et ont une tolérance de déplacement très limitée. Les caractéristiques mécaniques médiocre...
Article
The Crozet bridge is located on the Grenoble-Col du Fau motorway, in the Grenoble– Sisteron intinerary, fifteen kilometres south of Grenoble, Frace. It crosses a 350 m wide valley and the RN75 national road. The adaptation of the bridge to the lanscape has involved an arch design with three bays (direction of Grenoble–Sisteron) and one bay (direc...