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A platform for research: civil engineering, architecture and urbanism
Relationships between Erodibility and Properties of Soils
NCHRP Research Report 915: Relationship Between Erodibility and Properties of Soils provides state transportation geotechnical engineers, hydraulic engineers, structural engineers, and other practitioners with a detailed analysis and a searchable Microsoft® Excel spreadsheet, NCHRP-Erosion, that uses statistical techniques to relate geotechnical properties to soil erodibility. Downloadable from the TRB summary web page for this report (search trb.org for “NCHRP Research Report 915”), NCHRP-Erosion is a searchable database that includes compiled erosion data from the literature review and a plethora of erosion tests. It contains equations that may be used to estimate the erosion resistance of soil and determine whether erosion tests are needed. Analysis of the erodibility of geomaterials is important for the study of problems related to soil erosion such as bridge scour, embankment overtopping erosion, and stream stability. Erodibility is a relationship between the soil erosion rate and fluid velocity or hydraulic shear stress. Since different soils have different geotechnical properties, their erosion rates vary. Additionally, existing laboratory and field erosion soil tests yield varied results that make it difficult to achieve consistent and reliable estimates. Under NCHRP Project 24-43, Texas A&M University (TAMU) was asked to develop equations that quantify soil erodibility on the basis of soil properties. Two approaches were used: (1) development of correlations between the elements of the erosion function (critical velocity, critical shear stress, and slope of the erosion function) with basic soil properties (e.g., plasticity index, mean grain size, unit weight, and shear strength) and (2) use of erosion categories to develop best fit models where the erosion function fits in a zone between boundaries to be directly associated with a single category of the erosion function so that correlations with soil properties can be developed. TAMU completed an extensive literature search compiling erosion data from multiple sources worldwide and conducted hundreds of erosion and geotechnical property tests. Following detailed statistical analysis, a searchable Microsoft Excel spreadsheet that relates geotechnical properties to soil erodibility was developed. This spreadsheet, NCHRPErosion, can be downloaded from the TRB summary web page for NCHRP Research Report 915. Through the use of numerical simulations, the researchers also compared soil erosion test methods to inform test method selection. NCHRP Research Report 915 should be helpful for those responsible for geotechnical analysis within state transportation agencies and other practitioners.
Relationships between Erodibility and Properties of Soils
NCHRP Research Report 915: Relationship Between Erodibility and Properties of Soils provides state transportation geotechnical engineers, hydraulic engineers, structural engineers, and other practitioners with a detailed analysis and a searchable Microsoft® Excel spreadsheet, NCHRP-Erosion, that uses statistical techniques to relate geotechnical properties to soil erodibility. Downloadable from the TRB summary web page for this report (search trb.org for “NCHRP Research Report 915”), NCHRP-Erosion is a searchable database that includes compiled erosion data from the literature review and a plethora of erosion tests. It contains equations that may be used to estimate the erosion resistance of soil and determine whether erosion tests are needed. Analysis of the erodibility of geomaterials is important for the study of problems related to soil erosion such as bridge scour, embankment overtopping erosion, and stream stability. Erodibility is a relationship between the soil erosion rate and fluid velocity or hydraulic shear stress. Since different soils have different geotechnical properties, their erosion rates vary. Additionally, existing laboratory and field erosion soil tests yield varied results that make it difficult to achieve consistent and reliable estimates. Under NCHRP Project 24-43, Texas A&M University (TAMU) was asked to develop equations that quantify soil erodibility on the basis of soil properties. Two approaches were used: (1) development of correlations between the elements of the erosion function (critical velocity, critical shear stress, and slope of the erosion function) with basic soil properties (e.g., plasticity index, mean grain size, unit weight, and shear strength) and (2) use of erosion categories to develop best fit models where the erosion function fits in a zone between boundaries to be directly associated with a single category of the erosion function so that correlations with soil properties can be developed. TAMU completed an extensive literature search compiling erosion data from multiple sources worldwide and conducted hundreds of erosion and geotechnical property tests. Following detailed statistical analysis, a searchable Microsoft Excel spreadsheet that relates geotechnical properties to soil erodibility was developed. This spreadsheet, NCHRPErosion, can be downloaded from the TRB summary web page for NCHRP Research Report 915. Through the use of numerical simulations, the researchers also compared soil erosion test methods to inform test method selection. NCHRP Research Report 915 should be helpful for those responsible for geotechnical analysis within state transportation agencies and other practitioners.
Relationships between Erodibility and Properties of Soils
J. L. Briaud (author) / I. Shafii (author) / H. C. Chen (author) / Z. Medina-Cetina (author)
2019
338 pages
Report
No indication
English
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