The Experts below are selected from a list of 3381 Experts worldwide ranked by ideXlab platform

Abdoullah Namdar - One of the best experts on this subject based on the ideXlab platform.

  • Liquid and plastic limits evaluation of Mixed Soil matrices
    2015
    Co-Authors: Abdoullah Namdar, Azam Khodashenas Pelko
    Abstract:

    To improvement of Soil characteristics for maintaining its allowable load sustainability, deformation and stability understanding of Soils nature in creation of model by mixing Soil technique is first requirement at design of Soil foundation. In this investigation 31 Mixed Soil model were developed, and effect of liquid limit and plastic limit in controlling Soil bearing capacity under loose and compacted condition evaluated, and to achieve Soil behavior SEM and XRD results of any of Soils have been used, the result revealed Soil plasticity has direct correlation with Soil bearing capacity, stability and deformation, and these characteristics could be controlled if percentage of Mixed Soil accurate is selected or Soil mineralogy and morphology controlled. Keyword: Soil Characteristics, Soil Deformation, Soil Improvement

  • Evaluation of safe bearing capacity of Soil foundation by using numerical analysis method
    Frattura ed Integrità Strutturale, 2014
    Co-Authors: Abdoullah Namdar, Xiong Feng
    Abstract:

    The Soil mechanic laboratory results help in accurate Soil foundation design and enhancement failure mitigation. The mixing Soil design has been used in many geotechnical engineering for Soil improvement. In this paper, several types of Soil foundations have been made from Mixed Soil. The bearing capacity of Soil foundations by using Mixed Soil parameters and change footing dimensions have been calculated. 180 footings, placed on 15 Soil foundation types have been designed. It is assumed the underground water has not effect to bearing capacity of Soil foundation. The results of numerical analysis and Mixed Soils technique have been combined. The numerical analysis has supported Mixed Soil design, and introduced an appropriate result for Soil foundation design. The effects of Mixed Soil on depth and width of footing have been compared. The Mixed Soil design influenced numerical analysis result, and economically, Soil foundation design helps to select the appropriate dimensions of footings. The result of numerical analysis supports geotechnical and structural engineering codes, predicts structural stability with different age, natural hazard and prevention as well as it is useful in understanding safe bearing capacity of Soil foundation behavior.

  • Analysis of Slope Stability Using Limit Equilibrium
    The Bulletin of the Polytechnic Institute of Jassy Construction. Architecture Section, 2010
    Co-Authors: Abdoullah Namdar
    Abstract:

    In achievement of slope load sustainability using Mixed Soil technique, is considered acceptable the method for slope construction technology. This paper deals with evaluation of Mixed Soil technique for construction of stable slope and proves the Soil capability by analysis of computerized modeling, the revealed result of investigation, the possibility of using nearest local material, reducing project cost, solving the construction geotechnical problem and accurate understanding of Soil property when it is developed under different types of geometry.

  • EXPERIMENTAL, ANALYTICAL AND THEORETICAL SLOPE STABILITY ANALYSIS WITH DIFFERENT MATERIALS AND METHODS ANÁLISIS EXPERIMENTAL, ANALÍTICO Y TEÓRICO DE ESTABILIDAD DE TALUDES CON DIFERENTES MATERIALES Y MÉTODOS
    2010
    Co-Authors: Abdoullah Namdar, Azam Khodashenas Pelko
    Abstract:

    Slopes are usually constructed from Soil, although natural Soil or Mixed Soil are also in use or have proposed. This paper deals with evaluation of slope stability. It is understood possibility approaching certain level of slope stability based on experimental, theoretical and analytical methods. Result revealed that Mixed Soil characteristics could resist sufficient for static force based on appearing acceptable safe bearing capacity and for evaluation of shear stress­strain slope when is under seismic force using shaking table along with the theoretical and analytical methods provided concrete evidence for slope design at any part of slope.

  • EXPERIMENTAL, ANALYTICAL AND THEORETICAL SLOPE STABILITY ANALYSIS WITH DIFFERENT MATERIALS AND METHODS
    2010
    Co-Authors: Abdoullah Namdar, Azam Khodashenas Pelko
    Abstract:

    Slopes are usually constructed from Soil, although natural Soil or Mixed Soil are also in use or have proposed. This paper deals with evaluation of slope stability. It is understood possibility approaching certain level of slope stability based on experimental, theoretical and analytical methods. Result revealed that Mixed Soil characteristics could resist sufficient for static force based on appearing acceptable safe bearing capacity and for evaluation of shear stressstrain slope when is under seismic force using shaking table along with the theoretical and analytical methods provided concrete evidence for slope design at any part of slope.

J.-p. Wigneron - One of the best experts on this subject based on the ideXlab platform.

  • Surface temperature and Soil moisture retrieval in the Sahel from airborne multifrequency microwave radiometry
    IEEE Transactions on Geoscience and Remote Sensing, 1996
    Co-Authors: J.-c. Calvet, A. Chanzy, J.-p. Wigneron
    Abstract:

    Bipolarized microwave brightness temperatures of Sahel semiarid landscapes are analyzed at two frequencies: 5.05 and 36.5 GHz. These measurements were performed in Niger, West Africa, by the radiometer PORTOS in the framework of the Hydrologic Atmospheric Pilot Experiment in the Sahel (HAPEX-Sahel), during the end of the rainy season (August-September 1992). The airborne microwave data were collected simultaneously with radiosoundings of the atmosphere, and ground measurements of surface temperature, Soil moisture, and biomass of several vegetation types. After estimating the Soil roughness parameters, it is shown that two kinds of vegetation canopies must be considered: sparse canopies and patchy canopies including bare Soil strips. The Mixed Soil vegetation microwave emission is analyzed using a random continuous approach. The sparse canopy emission is efficiently described by considering the vegetation layer as homogeneous. Conversely, a simple Soil-vegetation mixing equation must be used for the patchy canopies. The problem with retrieving the canopy temperature and the near-surface Soil moisture is addressed. For every canopy, Soil moisture retrieval is possible. Soil moisture maps are proposed. The canopy temperature can also be retrieved with good accuracy provided both vertical (v) and horizontal (h) polarizations are available. It is shown that the retrieved variables can be used to separate landscape units through a classification procedure.

  • Surface temperature and Soil moisture retrieval in the Sahel from airborne multifrequency microwave radiometry
    1995 International Geoscience and Remote Sensing Symposium IGARSS '95. Quantitative Remote Sensing for Science and Applications, 1995
    Co-Authors: J.-c. Calvet, A. Chanzy, J.-p. Wigneron
    Abstract:

    Bipolarized microwave brightness temperatures of Sahel semiarid landscapes are analysed at two frequencies: 5.05, and 36.5 GHz. These measurements were performed in Niger, West Africa, by the radiometer PORTOS in the framework of the Hydrologic Atmospheric Pilot Experiment in the Sahel (HAPEX-Sahel), during the end of the rainy season (August-September) 1992. The airborne microwave data were collected simultaneously with radiosoundings of the atmosphere, and ground measurements of surface temperature, Soil moisture, and biomass of several vegetation types. After estimating the Soil roughness parameters it is shown that two kinds of vegetation canopies must be considered: sparse canopies and patchy canopies including bare Soil strips. The Mixed Soil-vegetation microwave emission is analysed using a random continuous approach. The sparse canopies emission is efficiently described by considering the vegetation layer as homogeneous. Conversely, a simple Soil-vegetation mixing equation must be used for the patchy canopies. The problem with retrieving the canopy temperature and the near-surface Soil moisture is addressed. For every canopy, Soil moisture retrieval can be achieved. Soil moisture maps are proposed. The canopy temperature can also be retrieved with good accuracy provided both vertical (v) and horizontal (h) polarizations are available.

Sandeep Kumar Chouksey - One of the best experts on this subject based on the ideXlab platform.

  • Analytical Model for Stress-Strain Response of Plastic Waste Mixed Soil
    Journal of Hazardous Toxic and Radioactive Waste, 2012
    Co-Authors: G. L. Sivakumar Babu, Sandeep Kumar Chouksey
    Abstract:

    Recycling plastic water bottles has become one of the major challenges world wide. The present study provides an approach for the use of plastic waste as reinforcement material in Soil, which can be used for ground improvement, subbases, and subgrade preparation in road construction. The experimental results are presented in the form of stress-strain-pore water pressure response and compression paths. On the basis of experimental test results, it is observed that the strength of Soil is improved and compressibility reduced significantly with the addition of a small percentage of plastic waste to the Soil. In this paper, an analytical model is proposed to evaluate the response of plastic waste Mixed Soil. It is noted that the model captures the stress-strain and pore water pressure response of all percentages of plastic waste adequately. The paper also provides a comparative study of failure stress obtained from different published models and the proposed model, which are compared with experimental results. The improvement in strength attributable to the inclusion of plastic waste can be advantageously used in ground improvement projects.

  • stress strain response of plastic waste Mixed Soil
    Waste Management, 2011
    Co-Authors: G Sivakumar L Babu, Sandeep Kumar Chouksey
    Abstract:

    Abstract Recycling plastic waste from water bottles has become one of the major challenges worldwide. The present study provides an approach for the use plastic waste as reinforcement material in Soil. The experimental results in the form of stress–strain-pore water pressure response are presented. Based on experimental test results, it is observed that the strength of Soil is improved and compressibility reduced significantly with addition of a small percentage of plastic waste to the Soil. The use of the improvement in strength and compressibility response due to inclusion of plastic waste can be advantageously used in bearing capacity improvement and settlement reduction in the design of shallow foundations.

  • Stress–strain response of plastic waste Mixed Soil
    Waste Management, 2010
    Co-Authors: G. L. Sivakumar Babu, Sandeep Kumar Chouksey
    Abstract:

    Abstract Recycling plastic waste from water bottles has become one of the major challenges worldwide. The present study provides an approach for the use plastic waste as reinforcement material in Soil. The experimental results in the form of stress–strain-pore water pressure response are presented. Based on experimental test results, it is observed that the strength of Soil is improved and compressibility reduced significantly with addition of a small percentage of plastic waste to the Soil. The use of the improvement in strength and compressibility response due to inclusion of plastic waste can be advantageously used in bearing capacity improvement and settlement reduction in the design of shallow foundations.

J.-c. Calvet - One of the best experts on this subject based on the ideXlab platform.

  • Surface temperature and Soil moisture retrieval in the Sahel from airborne multifrequency microwave radiometry
    IEEE Transactions on Geoscience and Remote Sensing, 1996
    Co-Authors: J.-c. Calvet, A. Chanzy, J.-p. Wigneron
    Abstract:

    Bipolarized microwave brightness temperatures of Sahel semiarid landscapes are analyzed at two frequencies: 5.05 and 36.5 GHz. These measurements were performed in Niger, West Africa, by the radiometer PORTOS in the framework of the Hydrologic Atmospheric Pilot Experiment in the Sahel (HAPEX-Sahel), during the end of the rainy season (August-September 1992). The airborne microwave data were collected simultaneously with radiosoundings of the atmosphere, and ground measurements of surface temperature, Soil moisture, and biomass of several vegetation types. After estimating the Soil roughness parameters, it is shown that two kinds of vegetation canopies must be considered: sparse canopies and patchy canopies including bare Soil strips. The Mixed Soil vegetation microwave emission is analyzed using a random continuous approach. The sparse canopy emission is efficiently described by considering the vegetation layer as homogeneous. Conversely, a simple Soil-vegetation mixing equation must be used for the patchy canopies. The problem with retrieving the canopy temperature and the near-surface Soil moisture is addressed. For every canopy, Soil moisture retrieval is possible. Soil moisture maps are proposed. The canopy temperature can also be retrieved with good accuracy provided both vertical (v) and horizontal (h) polarizations are available. It is shown that the retrieved variables can be used to separate landscape units through a classification procedure.

  • Surface temperature and Soil moisture retrieval in the Sahel from airborne multifrequency microwave radiometry
    1995 International Geoscience and Remote Sensing Symposium IGARSS '95. Quantitative Remote Sensing for Science and Applications, 1995
    Co-Authors: J.-c. Calvet, A. Chanzy, J.-p. Wigneron
    Abstract:

    Bipolarized microwave brightness temperatures of Sahel semiarid landscapes are analysed at two frequencies: 5.05, and 36.5 GHz. These measurements were performed in Niger, West Africa, by the radiometer PORTOS in the framework of the Hydrologic Atmospheric Pilot Experiment in the Sahel (HAPEX-Sahel), during the end of the rainy season (August-September) 1992. The airborne microwave data were collected simultaneously with radiosoundings of the atmosphere, and ground measurements of surface temperature, Soil moisture, and biomass of several vegetation types. After estimating the Soil roughness parameters it is shown that two kinds of vegetation canopies must be considered: sparse canopies and patchy canopies including bare Soil strips. The Mixed Soil-vegetation microwave emission is analysed using a random continuous approach. The sparse canopies emission is efficiently described by considering the vegetation layer as homogeneous. Conversely, a simple Soil-vegetation mixing equation must be used for the patchy canopies. The problem with retrieving the canopy temperature and the near-surface Soil moisture is addressed. For every canopy, Soil moisture retrieval can be achieved. Soil moisture maps are proposed. The canopy temperature can also be retrieved with good accuracy provided both vertical (v) and horizontal (h) polarizations are available.

A. Chanzy - One of the best experts on this subject based on the ideXlab platform.

  • Surface temperature and Soil moisture retrieval in the Sahel from airborne multifrequency microwave radiometry
    IEEE Transactions on Geoscience and Remote Sensing, 1996
    Co-Authors: J.-c. Calvet, A. Chanzy, J.-p. Wigneron
    Abstract:

    Bipolarized microwave brightness temperatures of Sahel semiarid landscapes are analyzed at two frequencies: 5.05 and 36.5 GHz. These measurements were performed in Niger, West Africa, by the radiometer PORTOS in the framework of the Hydrologic Atmospheric Pilot Experiment in the Sahel (HAPEX-Sahel), during the end of the rainy season (August-September 1992). The airborne microwave data were collected simultaneously with radiosoundings of the atmosphere, and ground measurements of surface temperature, Soil moisture, and biomass of several vegetation types. After estimating the Soil roughness parameters, it is shown that two kinds of vegetation canopies must be considered: sparse canopies and patchy canopies including bare Soil strips. The Mixed Soil vegetation microwave emission is analyzed using a random continuous approach. The sparse canopy emission is efficiently described by considering the vegetation layer as homogeneous. Conversely, a simple Soil-vegetation mixing equation must be used for the patchy canopies. The problem with retrieving the canopy temperature and the near-surface Soil moisture is addressed. For every canopy, Soil moisture retrieval is possible. Soil moisture maps are proposed. The canopy temperature can also be retrieved with good accuracy provided both vertical (v) and horizontal (h) polarizations are available. It is shown that the retrieved variables can be used to separate landscape units through a classification procedure.

  • Surface temperature and Soil moisture retrieval in the Sahel from airborne multifrequency microwave radiometry
    1995 International Geoscience and Remote Sensing Symposium IGARSS '95. Quantitative Remote Sensing for Science and Applications, 1995
    Co-Authors: J.-c. Calvet, A. Chanzy, J.-p. Wigneron
    Abstract:

    Bipolarized microwave brightness temperatures of Sahel semiarid landscapes are analysed at two frequencies: 5.05, and 36.5 GHz. These measurements were performed in Niger, West Africa, by the radiometer PORTOS in the framework of the Hydrologic Atmospheric Pilot Experiment in the Sahel (HAPEX-Sahel), during the end of the rainy season (August-September) 1992. The airborne microwave data were collected simultaneously with radiosoundings of the atmosphere, and ground measurements of surface temperature, Soil moisture, and biomass of several vegetation types. After estimating the Soil roughness parameters it is shown that two kinds of vegetation canopies must be considered: sparse canopies and patchy canopies including bare Soil strips. The Mixed Soil-vegetation microwave emission is analysed using a random continuous approach. The sparse canopies emission is efficiently described by considering the vegetation layer as homogeneous. Conversely, a simple Soil-vegetation mixing equation must be used for the patchy canopies. The problem with retrieving the canopy temperature and the near-surface Soil moisture is addressed. For every canopy, Soil moisture retrieval can be achieved. Soil moisture maps are proposed. The canopy temperature can also be retrieved with good accuracy provided both vertical (v) and horizontal (h) polarizations are available.