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Добірка наукової літератури з теми "Penetrometers Calibration"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 29 січня 2023

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Статті в журналах з теми "Penetrometers Calibration"

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MY, Kasali, Olla OO, D. James, MB Makanjuola, and IE Ahaneku. "CALIBRATION OF A MANUAL CONE PENETROMETER USING A DIGITAL PENETROLOGGER." American Journal of Agricultural Science, Engineering, and Technology 1, no. 3 (March 29, 2017): 10–17. http://dx.doi.org/10.54536/ajaset.v1i3.23.

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Анотація:
Cone penetrometers standardized by American Standards for Agricultural Engineering (ASAE) have been major instruments for investigating and quantifying soil compaction. However, the continuous use of penetrometers often introduces errors to the Cone Index (CI) readings obtained from the instruments over time. An ASAE calibrated digital cone penetrometer and a manual penetrometer were tested on a sandy clay loamy soil at the National Centre for Agricultural Mechanization (NCAM), Ilorin, Nigeria; using the ASAE small cone. The CI readings obtained for the two penetrometers were subjected to a statistical t-test. The results showed that the sensitivity of the manual cone penetrometer is comparable to that of the digital penetrologger at depths greater than 12cm as the mean difference showed no significant difference at this depth. However, at depths 0-11cm, there was significant difference in their mean difference; this shows the relative insensitivity of the manual cone penetrometer. The calibration results also showed that the continuous use of the manual cone penetrometer will require a multiplying facto r of 1.165 to get a CI reading close to ideal. Improvement on the manual cone penetrometer will also assist in obtaining CI readings after tillage operations.
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2

Parkin, A. A. "Calibration of cone penetrometers." International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 27, no. 2 (April 1990): A91. http://dx.doi.org/10.1016/0148-9062(90)95076-d.

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3

Shrivastava, Abhay K. "Development and calibration of radio-isotope cone penetrometers." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 539, no. 1-2 (February 2005): 421–26. http://dx.doi.org/10.1016/j.nima.2004.09.044.

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4

Wesley, L. D. "Interpretation of calibration chamber tests involving cone penetrometers in sands." Géotechnique 52, no. 4 (May 2002): 289–93. http://dx.doi.org/10.1680/geot.2002.52.4.289.

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5

Salgado, Rodrigo, and Monica Prezzi. "Penetration Rate Effects on Cone Resistance: Insights From Calibration Chamber and Field Testing." Soils and Rocks 37, no. 3 (September 1, 2014): 233–42. http://dx.doi.org/10.28927/sr.373233.

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Анотація:
Cone penetration in mixed or intermediate soils (soils containing mixtures of sand, silt and clay) is neither fully drained nor fully undrained at the standard cone penetration rate of 20 mm/s. Considerable research, mainly relying on centrifuge tests, has been undertaken to quantify the effects of penetration rate (and thus partial drainage) on cone resistance. In this paper, the effects of penetration rate on cone resistance in saturated clayey soils were investigated by performing field tests and miniature cone penetration tests in a calibration chamber. The field tests were performed at sites especially selected to span the range of drainage conditions from fully drained to fully undrained. The calibration chamber tests, using both conical and flat-tip penetrometers, were performed at different penetration rates in two specimens prepared by mixing kaolin clay and sand with different mixing ratios and one-dimensionally consolidateding the mixtures. A correlation between cone resistance and drainage conditions is established based on the cone penetration test results. The transitions from no drainage to partial drainage and from partial drainage to full drainage are defined as a function of penetration rate normalized with respect to the penetrometer diameter and the coefficient of consolidation.
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6

Straż, Grzegorz. "Preliminary investigations of organics soil in a new calibration chamber with the use of the FVT and DPL probe." E3S Web of Conferences 49 (2018): 00109. http://dx.doi.org/10.1051/e3sconf/20184900109.

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Анотація:
The proposal of investigations of soft organic soils in a new calibration chamber performed at the Rzeszow University of Technology has been presented in this paper. The unique feature of this chamber is the possibility of simultaneous soil testing with the use of two penetrometers: FVT (Field Vane Test) and DPL (Dynamic Probing Light). It has been possible due to the large size of the cylindrical soil sample: 62.5 cm in diameter and max. 80 cm high. Additionally, a construction with a new calibration chamber has been described, concerning potential capabilities and restrictions when conducting researches. The presented calibration chamber ensures the stability of the parameters set during the tests, which allows one to compare the test results and search for the relationship between the analyzed parameters. Shear strength from the FVT test was adopted as reference. The results of preliminary research were presented and a detailed research plan was prepared, which will be implemented in the next stages of the investigations.
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7

Ross, Robert, Avinash Baji, and Dean Barnett. "Inner Profile Measurement for Pipes Using Penetration Testing." Sensors 19, no. 2 (January 10, 2019): 237. http://dx.doi.org/10.3390/s19020237.

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Анотація:
Penetration testing has been used to measure material properties for over fifty years. Currently, it is under-utilised as a contemporary scientific and engineering tool for investigating the condition of pipes whose inner surface has been exposed to chemical attack. We describe the design, development and calibration of a portable probe which uses a penetrative strain gauge load cell to measure where the semi-solid surface starts and stops within a pipe. We also describe the results of field tests of the probe in concrete sewers, affected by internal corrosion, where the probe proved to be a fast and reliable method for collecting pipe profile information. The results indicate significant benefit in the use of penetrometers to perform concrete sewer condition assessment.
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8

Been, K., B. E. Lingnau, J. H. A. Crooks, and B. Leach. "Cone penetration test calibration for Erksak (Beaufort Sea) sand." Canadian Geotechnical Journal 24, no. 4 (November 1, 1987): 601–10. http://dx.doi.org/10.1139/t87-074.

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Анотація:
Interpretation of the cone penetration test in sands is generally based on empirical calibrations from tests in large-diameter calibration chambers. Although interpretation of these calibration data for clean sands in terms of the state parameter is expected to be broadly applicable to other sands, material-specific correlations are desirable for many projects. This paper describes a series of calibration chamber tests carried out on a sand dredged from the Beaufort Sea for construction of artificial islands. This Erksak sand is a uniformly graded, subrounded medium-grained sand with a fines content of 3–6%. The testing chamber described is 1.4 m in diameter, and allows independent control of vertical, horizontal, and back pressures on the sand sample. Samples of the sand were prepared by moist compaction to preserve the fines content, and then back pressure saturated.The chamber test data are presented and confirm that the Erksak sand fits the general trends observed for other sands very well. A method is also described that allows the interpretation to be consistent, even in the event that nonuniform void ratios occur in the samples. Measurements of horizontal stress behind the cone tip, which is a new development in cone penetrometer testing, are also presented. Key words: cone penetrometer, sands, in situ tests, state, calibration chamber, horizontal stress measurement.
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9

Kurup, Pradeep U., and Mehmet T. Tumay. "Calibration of a Miniature Cone Penetrometer for Highway Applications." Transportation Research Record: Journal of the Transportation Research Board 1614, no. 1 (January 1998): 8–14. http://dx.doi.org/10.3141/1614-02.

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Анотація:
The electronic cone penetrometer is an important in situ investigation tool of choice for site characterization. Application of this proven concept of the cone penetration test (CPT) to highway design and construction control by miniaturization is described. A miniature cone penetrometer with a projected cone area of 2 cm2 has been developed and implemented in a continuous intrusion miniature cone penetration test system (CIMCPT). This device may be used for rapid, accurate, and economical characterization of sites and to determine engineering soil parameters needed in the design of pavements, embankments, and earth structures. The miniature cone penetration test (MCPT) gives finer details than the standard 10-cm2 cross-sectional area reference cone penetrometer. This makes the MCPT attractive for subgrade characterization, quality-control assessment, compaction control of embankments, and assessment of ground improvement effectiveness for transportation infrastructure. In situ calibration of the CIMCPT system was conducted at a highway embankment site in Baton Rouge, Louisiana. MCPT penetration profiles were compared with those obtained by using the standard cone penetrometer at the same site. The tip resistance of the MCPT was 10 percent higher than that of the reference CPT. The sleeve friction and friction ratio of the reference CPT were higher than that of the MCPT by 12 and 23 percent, respectively. Calibration was also performed to determine empirical cone factors required for estimating undrained shear strength from MCPT data.
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10

Konrad, J. M. "In situ tests in a sand dune." Canadian Geotechnical Journal 28, no. 2 (April 1, 1991): 304–9. http://dx.doi.org/10.1139/t91-036.

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Анотація:
A field testing program using an electric piezocone penetrometer (CPTU) and a flat dilatometer (DMT) probe was carried out in a sand dune. The analysis of the field data in terms of relative density using current empirical correlations showed that significant differences were obtained at this site. It is suggested that any empirical correlation between relative density and CPT or DMT data obtained from calibration chambers should only be used for a sand that has the same slope of the steady-state line as the sand used in the calibration tests. Key words: sand, in situ density, field investigation, piezocone penetrometer, flat dilatometer, steady state.
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Більше джерел

Дисертації з теми "Penetrometers Calibration"

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Zohrabi, Morteza. "Calibration of penetrometers and interpretation of pressuremeters in sand." Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357954.

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2

Bouguerra, Hafid. "Prévision du potentiel de liquéfaction des sites sableux à l'aide d'appareillages in-situ." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0003.

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Анотація:
Le travail de recherche propose par de l'auteur se situe dans le domaine de la geomecanique. La prevision du risque de liquefaction des sables lors de seismes reste un probleme majeur pour tous les projets de genie civil dans les zones a haute sismicite. Le but de nos recherches est de developper des methodes de prevision a partir d'appareillages de reconnaissance en place plus precis et plus sophistiques que le spt, tels que le penetrometre statique, le pressiometre et le piezocone. Notre demarche implique des etudes en laboratoire dans des massifs de sol reconstitues dans des conditions bien controlees et des etudes sur le terrain, sur des sites potentiellement liquefiables. Dans la premiere partie, cette demarche s'articule autour de trois volets : la determination par des essais triaxiaux cycliques non-draines de la resistance a la liquefaction des sables utilises dans nos recherches, l'etude de la reponse des appareillages de reconnaissance en place, notamment celle du piezocone, dans des massifs de sable reconstitues dans la chambre d'etalonnage permettant de controler les conditions d'essais, l'etude de la reponse de ces memes appareillages sur des sites connus pour avoir liquefie ou potentiellement liquefiables. La synthese de ces trois permettra de proposer de nouvelles methodes de prevision de la liquefaction. Dans la seconde partie, l'interpretation des reponses de ces appareillages sur des sites, en vue de la prevision a la liquefaction a l'aide des methodes proposees. Enfin, il est interessant d'elaborer des correlations pour le sable d'hostun rf, vue la base de donnees de resultats penetrometriques et pressiometriques sur ce sable en chambre d'etalonnage et les confronter avec les recherches menees par ailleurs. Ces correlations peuvent ainsi deboucher sur des regles utilisables par les praticiens.
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3

Balachowski, Lech. "Différents aspects de la modélisation physique du comportement des pieux : chambre d'étalonnage et centrifugeuse." Grenoble INPG, 1995. http://www.theses.fr/1995INPG0067.

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Анотація:
Ce travail de recherche a ete effectue au sein du groupe geomecanique et ouvrages du laboratoire sols, solides, structures. Il concerne l'etude du comportement des pieux de grande dimension utilises comme fondations de structures en mer dans des sables denses. Cette etude a ete menee a l'aide de deux grands outils de modelisation physique: la chambre d'etalonnage du laboratoire 3s et la centrifugeuse du l. C. P. C de nantes. Les pieux installes pour des plates-formes petrolieres sont en general des pieux battus a base ouverte. Les essais de pieux realises en chambre d'etalonnage du laboratoire 3s ont permis d'etudier le comportement du bouchon a l'interieur du tube pendant le battage et le chargement statique. Ils ont montre l'influence de la profondeur simulee, de la densite du massif de sable et de sa surconsolidation sur la mobilisation de la resistance de pointe et du frottement lateral. Une allure plutot parabolique de l'evolution de la resistance de pointe et du frottement lateral avec la surcharge verticale appliquee au massif a ete observee. Les essais penetrometriques realises dans les memes conditions de densite et de confinement ont permis de proposer les regles penetrometriques pour le dimensionnement des pieux en mer. L'extrapolation des resultats de frottement mesure sur le modele au prototype reel peut poser des problemes lies a des effets d'echelle. Les essais d'arrachement de pieux-modeles en centrifugeuse du l. C. P. C de nantes ont permis d'evaluer l'effet d'echelle en frottement lie au rapport taille du modele/ taille des grains. Cet effet d'echelle est exprime en fonction du niveau de contraintes et du rapport taille du modele/ taille des grains. Il est compare a celui qu'on peut determiner a partir d'essais de cisaillement d'interface sol-structure. L'ensemble des experiences menees permet d'une part de deboucher sur des methodes de dimensionnement moins conservatives que celles habituellement utilisees en offshore, d'autre part de confirmer l'importance de la prise en compte du comportement d'interface sol-structure dans la modelisation numerique
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Книги з теми "Penetrometers Calibration"

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), International Symposium on Calibration Chamber Testing (1st 1991 Potsdam N. Y. Calibration chamber testing: Proceedings of the First International Symposium on Calibration Chamber Testing/ISOCCT1, Potsdam, New York, 28-29 June 1991. New York: Elsevier, 1991.

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Частини книг з теми "Penetrometers Calibration"

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Soage Santos, R., E. Gómez Meyer, J. Peuchen, G. Yetginer, T. Lunne, and T. Carrington. "Calibration of cone penetrometers according to International Organization for Standardization requirements." In Cone Penetration Testing 2022, 220–24. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003308829-26.

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2

Soage Santos, R., E. Gómez Meyer, J. Peuchen, G. Yetginer, T. Lunne, and T. Carrington. "Calibration of cone penetrometers according to International Organization for Standardization requirements." In Cone Penetration Testing 2022, 221–25. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003329091-26.

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3

Gansonré, Y., C. Bacconnet, P. Breul, M. Benz, P. Moustan, R. Gourvès, and S. De-Maistre. "Contribution to lateritic soils calibration using the dynamic penetrometer PANDA." In Bearing Capacity of Roads, Railways and Airfields, 783–89. CRC Press, 2017. http://dx.doi.org/10.1201/9781315100333-104.

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Звіти організацій з теми "Penetrometers Calibration"

1

Berney, Ernest, Jami Lynn Daugherty, and Lulu Edwards. Validation of the automatic dynamic cone penetrometer. Engineer Research and Development Center (U.S.), July 2022. http://dx.doi.org/10.21079/11681/44704.

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Анотація:
The U.S. military requires a rapid means of measuring subsurface soil strength for construction and repair of expeditionary pavement surfaces. Traditionally, a dynamic cone penetrometer (DCP) has served this purpose, providing strength with depth profiles in natural and prepared pavement surfaces. To improve upon this device, the Engineer Research and Development Center (ERDC) validated a new battery-powered automatic dynamic cone penetrometer (A-DCP) apparatus that automates the driving process by using a motor-driven hammering cap placed on top of a traditional DCP rod. The device improves upon a traditional DCP by applying three to four blows per second while digitally recording depth, blow count, and California Bearing Ratio (CBR). An integrated Global Positioning Sensor (GPS) and Bluetooth® connection allow for real-time data capture and stationing. Similarities were illustrated between the DCP and the A-DCP by generation of a new A-DCP calibration curve. This curve relates penetration rate to field CBR that nearly follows the DCP calibration with the exception of a slight offset. Field testing of the A-DCP showed less variability and more consistent strength measurement with depth at a speed five times greater than that of the DCP with minimal physical exertion by the operator.
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