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Relevant bibliographies by topics / Pocket penetrometer

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Academic literature on the topic 'Pocket penetrometer'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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Journal articles on the topic "Pocket penetrometer"

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Graesch, Anthony P., Sarah E. Shankel, and David M. Schaepe. "The Pocket Penetrometer." Advances in Archaeological Practice 3, no. 2 (May 2015): 93–106. http://dx.doi.org/10.7183/2326-3768.3.2.93.

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AbstractThe identification of earthen house floors or living surfaces during archaeological field investigations can be hampered by the scale of excavation, variable fieldworker experiences, and any number of site formation processes. Furthermore, although time- and context-sensitive sampling protocols (e.g., those required of macrobotanical and microartifact data collection) rely on in-the-moment identifications of floors, strong empirical evidence for the presence of house floors often comes well after the field season has concluded. Pocket penetrometers—inexpensive instruments that measure the compaction strength of soil—can lend empirical support to decisions about sampling procedures during onsite investigations. In this study, we present findings from the analysis of 4,463 penetrometer readings recorded during the excavation of residential and non-residential architecture at Welqámex, a Stó:lō-Coast Salish settlement in southwestern British Columbia. We show how pocket penetrometer data reveal quantifiable differences in the compaction of floors and other cultural deposits. We argue that compaction measurements can provide an additional line of data (ratio scale) to affirm or challenge onsite interpretations of stratigraphy based on other tactile and observational data, particularly as such interpretations pertain to surfaces expected to have been exposed to recurrent foot traffic

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Yasun, Azhar Sadiq. "Capability of Pocket Penetrometer to Evaluate Unconfined Compressive Strength of Baghdad Clayey Soil." Al-Nahrain Journal for Engineering Sciences 21, no. 1 (February 10, 2018): 66. http://dx.doi.org/10.29194/njes21010066.

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Unconfined compressive strength represents an important parameter for soil investigation report test results because the values of cohesion and allowable bearing capacity can directly obtained from the relevant test especially if the clayey soil layers are found at sufficient enough depth above water table level. This paper deals with simple comparison (based on (31) soil samples) between unconfined compressive strength (qu) obtained by using the pocket soil penetrometer tool and the unconfined compressive strength using the conventional test for the same sample penetrated by the pocket penetrometer with different soil moisture contents. Two triaxial specimens, sample type-1- with dimensions 38 X 79mm and type-2- with dimensions 33 X 79mm(diam. X height)) prepared in the libratory. It was found that the results refers that soil pocket penetrometer readings are closed enough to the results that obtained from the unconfined compression test result with certain conditions. The average percentage of difference between penetrometer readings and unconfined compression test result values was (1.103%) for sample type-1- and (1.53%) for sample type -2-. The maximum moisture content for all tests samples was (27.3%) and the minimum was (14.7%) while the average moisture content was(20.9%).

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Ajayi, Ayodele Ebenezer, Moacir de Souza Dias Junior, Nilton Curi, Cezar Francisco Araujo Junior, Olanike Olaiya Aladenola, Thiago Tadeu Teixeira Souza, and Alberto Vasconcellos Inda Junior. "Comparison of estimation methods of soil strength in five soils." Revista Brasileira de Ciência do Solo 33, no. 3 (June 2009): 487–95. http://dx.doi.org/10.1590/s0100-06832009000300002.

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In agriculture, the soil strength is used to describe the susceptibility to deformation by pressure caused by agricultural machine. The purpose of this study was to compare different methods for estimating the inherent soil strength and to identify their suitability for the evaluation of load support capacity, compaction susceptibility and root growth. The physical, chemical, mineralogical and intrinsic strength properties of seven soil samples, collected from five sampling pits at different locations in Brazil, were measured. Four clay (CS) and three sandy clay loam (SCL) soils were used. The clay soils were collected on a farm in Santo Ângelo, RS (28 º 16 ' 16 '' S; 54 º 13 ' 11 '' W 290 m); A and B horizons at the Universidade Federal de Lavras, Lavras, MG (21 º 13 ' 47 '' S; 44 º 58 ' 6'' W; 918 m) and on the farm Sygenta, in Uberlandia, MG (18 º 58 ' 37 '' S; 48 º 12 ' 05 '' W 866 m). The sandy clay loam soils were collected in Aracruz, ES (19 º 47 ' 10 '' S; 40 º 16 ' 29 '' W 81 m), and on the farm Xavier, Lavras, MG (21 º 13 ' 24 '' S; 45 º 05 ' 00 '' W; 844 m). Soil strength was estimated based on measurements of: (a) a pneumatic consolidometer, (b) manual pocket (non-rotating) penetrometer; and (c) automatic (rotating) penetrometer. The results of soil strength properties were similar by the three methods. The soil structure had a significant influence on soil strength. Results of measurements with both the manual pocket and the electric penetrometer were similar, emphasizing the influence of soil texture. The data showed that, to enhance the reliability of predictions of preconsolidation pressure by penetrometers, it is better to separate the soils into the different classes, rather than analyze them jointly. It can be concluded that the consolidometer method, although expensive, is the best when evaluations of load support capacity and compaction susceptibility of soil samples are desired.

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Wichmann, Knut, and Andreas Riehl. "Mechanical properties of waterwork sludges – shear strength." Water Science and Technology 36, no. 11 (December 1, 1997): 43–50. http://dx.doi.org/10.2166/wst.1997.0392.

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In order to ensure a regular and environmentally safe utilization and disposal of waterwork sludges especially the mechanical properties must be controlled. Monitoring of the mechanical properties is of great importance to almost all treatment, utilization and disposal operations. Depending on the raw water source and the treatment processes, different types of waterwork sludge can be described. The first step of this research project included the collection of data from literature reports, information about measuring methods on rheological and soil mechanical parameters and preliminary measurements on selected waterwork sludge samples. Measurement of vane shear strength is a method used in the field of waste disposal/landfill in Germany. Therefore this method was the main topic of the first investigations. Aims were to examine: 1. Influence of water contents and dewatering capacity on shear strength. 2. Correlation between laboratory and field measurement devices. Sludge samples from different waterworks were investigated with following devices: laboratory vane shear apparatus, pocket vane apparatus, pocket penetrometer and capillary suction time measuring.

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Mousavi, Fatemeh, Ehsan Abdi, Shaaban Ghalandarayeshi, and Deborah S. Page-Dumroese. "Modeling unconfined compressive strength of fine-grained soils: Application of pocket penetrometer for predicting soil strength." CATENA 196 (January 2021): 104890. http://dx.doi.org/10.1016/j.catena.2020.104890.

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Steber, Aaron, Ken Brooks, Charles H. Perry, and Kolka Randy. "Surface Compaction Estimates and Soil Sensitivity in Aspen Stands of the Great Lakes States." Northern Journal of Applied Forestry 24, no. 4 (December 1, 2007): 276–81. http://dx.doi.org/10.1093/njaf/24.4.276.

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Abstract Aspen forests in the Great Lakes States support much of the regional timber industry. Management-induced soil compaction is a concern because it affects forest health and productivity and soil erosion. Soil compaction increases bulk density and soil strength and can also decrease air and water movement into and through the soil profile. Currently, most inventories, and specifically the Forest Inventory and Analysis program, use qualitative estimates of soil compaction. This study compared qualitative estimates with quantitative measurements on aspen clearcuts in five national forests in the Great Lakes States. Research sites were stratified into classes of high and low potential for soil compaction on the basis of soil texture. Qualitative visual assessments of compaction were made according to Forest Inventory and Analysis (FIA) phase 3 protocols and compared with physical measurements of bulk density, soil compression strength, and saturated hydraulic conductivity. No differences in compaction between high- and low-risk soils were detected using visual assessments, but quantitative measurements in high-risk, fine-textured soils indicated greater compaction than low-risk, coarse-textured soils. These results illustrate shortcomings in qualitative estimates of compaction made according to FIA phase 3 field protocols. Inexpensive quantitative measurements, such as those taken with a pocket penetrometer, may be sufficient to quantify compaction levels within the plots.

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Hirsch, Florian, Thomas Raab, Sebastian Heller, and Albrecht Bauriegel. "Classification of pedogenic cementation in Podzols by pocket penetrometry." Journal of Plant Nutrition and Soil Science 180, no. 4 (June 27, 2017): 430–35. http://dx.doi.org/10.1002/jpln.201600395.

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8

Misra, RK, and CW Rose. "An examination of the relationship between erodibility parameters and soil strength." Soil Research 33, no. 4 (1995): 715. http://dx.doi.org/10.1071/sr9950715.

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Erosion rate of soil by the impact of raindrops and overland flow of water is often considered to be affected by the shear strength of surface soil. Physically based erosion models indicate a link between defined erodibility parameters and soil strength. The objectives of this paper are to determine erodibility parameters with the process-based erosion model GUEST for a. krasnozem soil of two contrasting strengths, and to examine the influence of soil strength on erodibility parameters. Soil beds of width 1 m and length 5.8 m, with and without compaction, were exposed to simulated, constant rate rainfall. A range of slopes was used. Detachment trays of width 300 mm and downslope length 200 mm containing soils of identical strength were placed at the same slope and exposed to the same rain in order to determine the effects of rainfall-driven processes alone on erosion. Soil strength was measured with a hand vane tester and a pocket penetrometer to determine whether compaction was effective in modifying soil strength. Temporal variation in sediment concentrations (c) for the large soil beds and detachment trays was measured for each slope and soil strength. The settling velocity characteristic of soil, with and without exposure to rain, was determined with the modified bottom withdrawal tube technique. Values of c decreased with increase in soil strength. The relationship between c and slope was influenced by soil strength in a manner consistent with the theoretical expectation of the role of soil strength in controlling erosion. Rilling during erosion was absent only when the soil was compacted. The average settling velocity of the soil exposed to rain (i.e. its depositability) was significantly lower than for the same soil not subjected to rain, indicating a breakdown of soil aggregates as a result of raindrop impact. Rainfall detachability parameters (estimated with GUEST) Were lower when soil strength was high. Runoff-driven erodibility parameters, namely the specific energy of entrainment (J), increased and the approximate erodibility parameter (�) decreased with increase in soil strength. The Variation in these erodibility parameters with soil strength was consistent with the theory implemented in GUEST. Detailed analysis of the relative contribution of rainfall- and runoff-driven processes to c at varying stream powers and soil strengths indicated that, at high soil strength, uncertainty in the values of J and � is high because of the higher contribution to c of rainfall-driven rather than runoff-driven processes. The adequacy of in situ measurement of soil strength as an indicator of soil erodibility is discussed in relation to the results presented.

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9

"The use of static penetration and pocket penetrometer in China." International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 28, no. 1 (January 1991): A31. http://dx.doi.org/10.1016/0148-9062(91)93486-p.

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Dissertations / Theses on the topic "Pocket penetrometer"

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Oh, Won Taek. "Simple Techniques for the Implementation of the Mechanics of Unsaturated Soils into Engineering Practice." Thesis, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23533.

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Over the past 50 years, several advancements have been made in the research area of the mechanics of unsaturated soils. These advancements can be categorized into two groups; (i) development (or improvement) of testing techniques (or apparatus) to determine the mechanical properties of unsaturated soils and (ii) development of (numerical, empirical or semi-empirical) models to estimate the variation of mechanical properties of unsaturated soils with respect to suction based on the experimental results. Implementation of the mechanics of unsaturated soils in conventional geotechnical engineering practice, however, has been rather limited. The key reasons for the limited practical applications may be attributed to the lack of simple and reliable methods for (i) measuring soil suction in the field quickly and reliably and (ii) estimating the variation of mechanical properties of unsaturated soils with respect to suction. The main objective of this thesis research is to develop simple and reliable techniques, models or approaches that can be used in geotechnical engineering practice to estimate sol suction and the mechanical properties of unsaturated soils. This research can be categorized into three parts. In the First Part, simple techniques are proposed to estimate the suction values of as-compacted unsaturated fine-grained soils using a pocket penetrometer and a conventional tensiometer. The suction values less than 300 kPa can be estimated using a strong relationship between the compressive strength measured using a pocket penetrometer and matric suction value. The high suction values in the range of 1,200 kPa to 60,000 kPa can be estimated using the unique relationship between the initial tangent of conventional tensiometer response versus time behavior and suction value. In the Second Part, approaches or semi-empirical models are proposed to estimate the variation of mechanical properties of unsaturated soils with respect to suction, which include: - Bearing capacity of unsaturated fine-grained soils - Variation of bearing capacity of unsaturated fine-grained soils with respect to matric suction - Variation of initial tangent elastic modulus of unsaturated soils below shallow foundations with respect to matric suction - Variation of maximum shear modulus with respect to matric suction for unsaturated non-plastic sandy soils (i.e. plasticity index, Ip = 0 %) In the Third Part, approaches (or methodologies) are suggested to simulate the vertically applied stress versus surface settlement behavior of shallow foundations in unsaturated coarse-grained soils assuming elastic-perfectly plastic behavior. These methodologies are extended to simulate the stress versus settlement behavior of both model footings and in-situ plates in unsaturated coarse-grained soils. The results show that there is a reasonably good comparison between the measured values (i.e. soil suction, bearing capacity, elastic and shear modulus) and those estimated using the techniques or models proposed in this thesis research. The models (or methodologies) proposed in this thesis research are promising and encouraging for modeling studies and practicing engineers to estimate the variation of mechanical behavior of unsaturated soils with respect to matric suction.

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Book chapters on the topic "Pocket penetrometer"

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"pocket penetrometer." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 1019. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_162659.

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"pocket penetrometer." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 1019. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_162660.

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Conference papers on the topic "Pocket penetrometer"

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Yasun, Azhar Sadiq, Qassun S. Mohammed Shafiqu, and Luaay Hassan Jabar. "Soils field compaction ratio estimation using field pocket penetrometer tool readings." In 2ND INTERNATIONAL CONFERENCE ON MATERIALS ENGINEERING & SCIENCE (IConMEAS 2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0000094.

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2

Vanapalli, Sai K., and Won Taek Oh. "A Simple Technique for Estimating Matric Suction of Unsaturated Fine-Grained Soils Using Pocket Penetrometer." In GeoHunan International Conference 2011. Reston, VA: American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/47628(407)8.

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Reports on the topic "Pocket penetrometer"

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Amacher, Michael C., and Katherine P. O'Neill. Assessing soil compaction on Forest Inventory & Analysis phase 3 field plots using a pocket penetrometer. Ft. Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2004. http://dx.doi.org/10.2737/rmrs-rp-46.

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