Evaluation of Soil Stiffness PDF Download

Author: Santosh S. Salimath
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 340

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Author: Auckpath Sawangsuriya
Publisher:
ISBN:
Category :
Languages : en
Pages : 478

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Author: Shad M. Sargand
Publisher:
ISBN:
Category : Soil surveys
Languages : en
Pages : 63

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Author: James Kent Higgins
Publisher:
ISBN:
Category : Fly ash
Languages : en
Pages : 118

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Author: Phung Duc Long
Publisher: Springer Nature
ISBN: 9811521840
Category : Science
Languages : en
Pages : 1417

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Book Description
This book presents 09 keynote and invited lectures and 177 technical papers from the 4th International Conference on Geotechnics for Sustainable Infrastructure Development, held on 28-29 Nov 2019 in Hanoi, Vietnam. The papers come from 35 countries of the five different continents, and are grouped in six conference themes: 1) Deep Foundations; 2) Tunnelling and Underground Spaces; 3) Ground Improvement; 4) Landslide and Erosion; 5) Geotechnical Modelling and Monitoring; and 6) Coastal Foundation Engineering. The keynote lectures are devoted by Prof. Harry Poulos (Australia), Prof. Adam Bezuijen (Belgium), Prof. Delwyn Fredlund (Canada), Prof. Lidija Zdravkovic (UK), Prof. Masaki Kitazume (Japan), and Prof. Mark Randolph (Australia). Four invited lectures are given by Prof. Charles Ng, ISSMGE President, Prof.Eun Chul Shin, ISSMGE Vice-President for Asia, Prof. Norikazu Shimizu (Japan), and Dr.Kenji Mori (Japan).

Author: Farhana Rahman
Publisher:
ISBN:
Category : Compacting
Languages : en
Pages : 10

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Mechanistic pavement design procedures based on elastic layer theory require characterization of pavement layer materials including subgrade soil. This paper discusses the subgrade stiffness measurements obtained from a new compaction roller for compaction control on highway embankment projects in Kansas. Three test sections were compacted using a single, smooth steel drum intelligent compaction (IC) roller that compacts and simultaneously, measures stiffness values of the compacted soil. Traditional compaction control measurements such as, density, in-situ moisture content, stiffness measurements using a soil stiffness gage, surface deflection tests using the light falling weight deflectometer (LFWD) and falling weight deflectometer (FWD), and penetration tests using a dynamic cone penetrometer (DCP), were also done. The results show that the IC roller was able to identify the locations of lower soil stiffness in the spatial direction. Thus, an IC roller can be used in proof rolling. IC roller stiffness showed sensitivity to the field moisture content indicating that moisture control during compaction is critical. No universal correlation was observed among the IC roller stiffness, soil gage stiffness, back-calculated subgrade moduli from the LFWD and FWD deflection data, and the California bearing ratio obtained from DCP tests. The discrepancy seems to arise from the fact that different pieces of equipment were capturing response from different volumes of soil on the same test section.

Author: Ali Maher
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 46

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This report pertains to the evaluation of a non-nuclear means of determining the dry density of soils. The device is called the Humboldt Stiffness Gauge (HSG). The device is essentially a small-scale plate load test and takes approximately 1 minute to conduct. The test parameter from the test is a stiffness value that is averaged over approximately 6 to 12 in. beneath the HSG. A regression equation, determined by the manufacturer, uses the stiffness parameter to determine the dry density of the soil. However, to establish the regression equation, prior knowledge of the soil's moisture content and dry density is needed. Research was conducted both in the laboratory and in the field to evaluate the HSG.

Author: Thomas Benz
Publisher:
ISBN: 9783921837559
Category :
Languages : en
Pages : 187

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Author: Lary R. Lenke
Publisher:
ISBN:
Category : Soil compaction
Languages : en
Pages : 58

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Book Description
The use of nuclear methods for compaction control is increasingly problematic for state highway agencies. Regulatory and safety issues have prompted agencies such as the New Mexico State Highway and Transportation Department to look for non-nuclear alternatives for compaction control. This report describes the evaluation of one such commercially available device known as the GeoGauge. The GeoGauge measures soil stiffness, arguably, a much more viable engineering parameter than the moisture-density relations currently used. The GeoGauge was found to measure soil stiffness as advertised. Results relating moisture, density, and stiffness were found to be consistent with earlier research on compaction and mechanical strength of soils. However, because of the dynamic nature of the measurement obtained via the GeoGauge and associated boundary constraints, the ability to obtain a target value for stiffness in the laboratory has proved to be elusive. Because of the promising nature of the GeoGauge technology, and because it measures a true engineering mechanical property, a paradigm shift may be necessary for implementation for field compaction control. Future specifications for compaction using this technology may require specific controls of moisture and requirements concerning compaction equipment with stiffness monitoring, via the GeoGauge.

Author: Giorgio Lollino
Publisher: Springer
ISBN: 3319090607
Category : Science
Languages : en
Pages : 1003

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Book Description
This book is one out of 8 IAEG XII Congress volumes, and deals with the theme of applied geology, which is a critical theme for the global economy. In the international, multidisciplinary approach to major engineering projects (either to macro- or mega-scale), the application of geological investigation techniques is fundamental for properly selecting the location sites, planning the construction and maintaining the infrastructures. The contributions in this book include not only engineering constructions but also case studies related to large projects on geo-resources exploration and extraction (minerals, petroleum and groundwater), energy production (hydropower, geothermal, nuclear and others), transportation (railway and highway) and waste disposal as well as the environmental management of these and other activities. The Engineering Geology for Society and Territory volumes of the IAEG XII Congress held in Torino from September 15-19, 2014, analyze the dynamic role of engineering geology in our changing world and build on the four main themes of the congress: Environment, processes, issues, and approaches. The congress topics and subject areas of the 8 IAEG XII Congress volumes are: 1. Climate Change and Engineering Geology 2. Landslide Processes 3. River Basins, Reservoir Sedimentation and Water Resources 4. Marine and Coastal Processes 5. Urban Geology, Sustainable Planning and Landscape Exploitation 6. Applied Geology for Major Engineering Projects 7. Education, Professional Ethics and Public Recognition of Engineering Geology 8. Preservation of Cultural Heritage.