Comparison of soil strength measurements of agricultural soils in Nebraska

Wieder, Wendy L.; Shoop, Sally A.; Barna, Lynette A.; Franz, Trenton E.; Finkenbiner, Catherine

doi:10.1016/j.jterra.2018.02.003

Cited by 22 publications

(15 citation statements)

References 6 publications

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“…We rotated the original coordinate system XOY in the clockwise direction by angle η, such that in the newly obtained coordinate system X ′ O ′ Y ′ , the X ′ axis is perpendicular and the Y ′ axis is parallel to the shear plane. We then transformed the stress components in equation (1) to those in the X ′ O ′ Y ′ coordinate system. With η � (π/2 − α − ψ) and ξ � θ + η, the stress components in the polar coordinate system can be transformed to those in the X ′ O ′ Y ′ orthogonal coordinate system.…”

Section: Force Analysis On Soil During Shearingmentioning

confidence: 99%

“…e in-serve strength of the strata refers to the effective strength that the underground rock and soil can provide during the operation of the underground structure. Currently, methods for testing soil in-serve strength include cone penetration tests, drop penetration tests, plate load tests, pressuremeter tests, and vane shear tests, from which strength parameters such as bearing capacity, shear strength, cohesion, and angle of internal friction can be obtained [1]. In addition, the combined drilling core indoor test, which is another important method used for evaluation of in situ soil strength, has been applied widely in real engineering projects.…”

Section: Introductionmentioning

confidence: 99%

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Quantitative Detection of In‐Service Strength of Underground Space Strata considering Soil‐Water Interaction

Zhou

2020

Advances in Civil Engineering

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The in-service strength test of underground space strata is a hot issue in geotechnical engineering. In this study, we conducted mechanical analyses on the soil and the cutting bit involved in a rotary drilling process, which revealed the key factors influencing drilling. This allowed us to establish theoretical relationships among torque, propulsion, and soil strength parameters (i.e., unconfined compressive strength, shear strength, and cohesion). Moreover, with consideration of the effects of water content and geostatic stresses, we used an independently developed rotary drilling system with a 3D flexible boundary loading device to conduct 75 rotary drilling model indoor tests on silty clay in 15 groups. Based on the test results, we simplified the theoretical relationships and determined model parameters to obtain 15 quantitative relationships with 5 different water contents (4.8%, 9.7%, 14.8%, 19.6%, and 24.9%). Finally, through field application, we verified the quantitative relationships and we discussed their scope of application. The results showed it is feasible to predict the soil in-service strength based on rotary drilling parameters. Under the premise that water content is considered, the drilling parameters were found correlated linearly (correlation coefficients are all greater than 0.85) with strength parameters. In field application, absolute errors between the prediction and investigation results were less than 5%, satisfying engineering requirements.

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Section: Force Analysis On Soil During Shearingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quantitative Detection of In‐Service Strength of Underground Space Strata considering Soil‐Water Interaction

Zhou

2020

Advances in Civil Engineering

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“…The fourth IV reading is used to estimate the soil CBR. For the 0.5 kg (Affleck et al, 2008), 2.25 kg Clegg (Wieder et al, 2018), and 4.5 kg Clegg (Clegg, 1986) the equations are respectively…”

Section: Strength -Clegg Impact Soil Testermentioning

confidence: 99%

Peat and organic soil characterization during seasonal mobility testing

Frankenstein¹,

Barna²,

Elder³

et al. 2020

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“…At a minimum, the vegetation description should include the type and size of the plants and a measure of the above and below ground biomass (organic material). Beyond this, the root length per soil volume, root surface area, and root average diameter appear to be the more critical measurements (Wieder and Shoop 2018).…”

Section: Vegetation Impacts On Soil Strengthmentioning

confidence: 99%

“…COSMOS is a soil moisture sensing system developed for use in the agricultural industry. In cooperation with the University of Nebraska-Lincoln, Wieder et al (2016Wieder et al ( , 2018 documented fieldwork in Nebraska with the COSMOS remote soil moisture sensing system coupled with soil strength measurements to explore the usefulness of the sensor in the context of strength assessment on agricultural lands. The study investigated using the Light Weight Deflectometer (LWD) as a soil surface strength tool for the purposes of assessing bearing capacity of soft soils.…”

Section: Cosmosmentioning

confidence: 99%

Terrestrial Geospatial Remote Assessment for Ingress Locations (Terrestrial GRAIL)

Shoop¹,

Wieder²

2018

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The Terrestrial Geospatial Remote Assessment for Ingress Locations (GRAIL) portion of the Army Terrestrial Environmental Modeling and Intelligence System Science and Technology Objective-Research (ARTEMIS STO-R) program was developed to use remote methods of terrain analysis to search for areas suitable for vehicle or aircraft maneuverability, based on slope, roughness, vegetation, soil type, and wetness, and to also perform direct classification of imagery based on soil strength. The product of the GRAIL project was a software program entitled GRAIL Tools. Using a series of filters, GRAIL Tools first eliminates areas of unsuitable slope, land use, obstacles, and vegetation. The algorithms for these filters, using both unsupervised and supervised classification approaches, were applied and trained by a limited amount of ground truth strength measurements to improve GRAIL Tools' site selection capabilities. GRAIL Tools then searches for sites that meet geometric criteria for landing and drop zones, the final result being a map of potential landing and drop zones superimposed over satellite imagery. The first generation of GRAIL Tools has proven capable of identifying austere landing and drop zones using remote assessment techniques. GRAIL Tools has been integrated in to the U.S. Army's Situational Awareness Geospatially Enabled (SAGE) software platform. DISCLAIMER: The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents.

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Comparison of soil strength measurements of agricultural soils in Nebraska

Cited by 22 publications

References 6 publications

Quantitative Detection of In‐Service Strength of Underground Space Strata considering Soil‐Water Interaction

Quantitative Detection of In‐Service Strength of Underground Space Strata considering Soil‐Water Interaction

Peat and organic soil characterization during seasonal mobility testing

Terrestrial Geospatial Remote Assessment for Ingress Locations (Terrestrial GRAIL)

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