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SOIL COMPACTION CHARACTERISTICS PREDICTION MODELS FOR SOIL PREPARATION IN SOIL BIN EXPERIMENTS
Authors: Oyetayo Oyebode, Koichi Shoji
Identifier: CSBE21761
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Published in: CSBE-SCGAB Technical Conferences » 5th CIGR and AGM Quebec City 2021 » Regular Sessions
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Description: The process of attaining a desired (particular) cone penetration resistance in soil bin experiments is most times difficult. To overcome this, simple models relating the number of roller passes and the number of soil layers to the maximum cone penetration resistance, depth where it occurred, and sinkage were developed. 30 cm deep sandy-clay-loam soil was compacted either at once, twice (15 cm each), or four times (7.5cm each) with a 27 cm diameter steel roller weighing 103 kg/m at two, four, or eight passes. The cone penetration resistance was thereafter measured with a digitized cone penetrometer. The sinkage of compacted soil was measured with ultrasonic sensors as the difference in height of the soil bed before and after compaction. The maximum cone penetration resistance attained and the depth at which they occur as well as the sinkage were recorded as the independent variables and were statistically analyzed. The results show that the cone penetration resistance, depth of occurrence, and sinkage were significantly affected by the number of layers and number of passes. Regression models relating maximum cone penetration resistance, depth of occurrence, and sinkage with the number of layers and the number of roller passes were thus developed. They have R-squares and standard errors of (0.90, 10.7 kPa), (0.66, 29.9 mm) and (0.93, 6.7mm) respectively. These R-square and standard error values indicate that the models are reasonably accurate and can be used as a guide when preparing soils to attain varied cone penetration resistance in soil bin experiments.
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Date: 2021-06-11
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Conference name: 5th CIGR International Conference and CSBE-SCGAB AGM 2021, Quebec City,QC, 11-14 May 2021.
Session name: Soil and Water 2 - Soils Topics
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Type: Text.Abstract
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Publication type: Presentation
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Language 1: en
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Rights: Canadian Society for Bioengineering
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DOI:
Description: The process of attaining a desired (particular) cone penetration resistance in soil bin experiments is most times difficult. To overcome this, simple models relating the number of roller passes and the number of soil layers to the maximum cone penetration resistance, depth where it occurred, and sinkage were developed. 30 cm deep sandy-clay-loam soil was compacted either at once, twice (15 cm each), or four times (7.5cm each) with a 27 cm diameter steel roller weighing 103 kg/m at two, four, or eight passes. The cone penetration resistance was thereafter measured with a digitized cone penetrometer. The sinkage of compacted soil was measured with ultrasonic sensors as the difference in height of the soil bed before and after compaction. The maximum cone penetration resistance attained and the depth at which they occur as well as the sinkage were recorded as the independent variables and were statistically analyzed. The results show that the cone penetration resistance, depth of occurrence, and sinkage were significantly affected by the number of layers and number of passes. Regression models relating maximum cone penetration resistance, depth of occurrence, and sinkage with the number of layers and the number of roller passes were thus developed. They have R-squares and standard errors of (0.90, 10.7 kPa), (0.66, 29.9 mm) and (0.93, 6.7mm) respectively. These R-square and standard error values indicate that the models are reasonably accurate and can be used as a guide when preparing soils to attain varied cone penetration resistance in soil bin experiments.
Keywords:
Résumé:
Mots-clés:
Citation:
Volume:
Issue:
Pages -
Contributor:
Date: 2021-06-11
Technical field:
Conference name: 5th CIGR International Conference and CSBE-SCGAB AGM 2021, Quebec City,QC, 11-14 May 2021.
Session name: Soil and Water 2 - Soils Topics
Other information:
Type: Text.Abstract
Format:
Publication type: Presentation
Source:
Relation:
Coverage:
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files:
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