Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The Giroud-Han design method for geosynthetic-reinforced unpaved roads
The Giroud-Han (G-H) design method provides a design tool to determine the thicknesses of unreinforced and geosynthetic-reinforced aggregate bases for unpaved roads over soft subgrade. The method was published in the ASCE Journal of Geotechnical and Geoenvironmental Engineering (Part 1: 130(2004)8, 776-786; Part 2: 130(2004)8, 787-797). This article presents a summary of the method's features. In particular, the article indicates the equations that are generic - and can be used with any geosynthetic with appropriate calibration - and the equations that were calibrated for specific geosynthetics. First, definitions pertinent to unpaved roads are explained. Then, the basic ideas underlying the G-H method are elucidated. The basic generic equation for estimating the required base (aggregate layer) thickness contains five parameters including the shear strength of the subgrade. The selection of some parameter values, calibration and validation of the G-H method are discussed in detail. The G-H method can be expressed as a function of the CBR (California Bearing Ratio). The method is applicable and limited to the following conditions: 1) the subgrade soil is assumed to be saturated and to have a low permeability (silt, clay); 2) through extensive use of the method, it has been determined that is applicable to rut depths ranging between 40 and 100 mm; 3) the minimum required thickness of the base is 100 mm because the G-H base thickness is a compacted base thickness. These limitations are related to the generic aspects of the G-H method.
The Giroud-Han design method for geosynthetic-reinforced unpaved roads
The Giroud-Han (G-H) design method provides a design tool to determine the thicknesses of unreinforced and geosynthetic-reinforced aggregate bases for unpaved roads over soft subgrade. The method was published in the ASCE Journal of Geotechnical and Geoenvironmental Engineering (Part 1: 130(2004)8, 776-786; Part 2: 130(2004)8, 787-797). This article presents a summary of the method's features. In particular, the article indicates the equations that are generic - and can be used with any geosynthetic with appropriate calibration - and the equations that were calibrated for specific geosynthetics. First, definitions pertinent to unpaved roads are explained. Then, the basic ideas underlying the G-H method are elucidated. The basic generic equation for estimating the required base (aggregate layer) thickness contains five parameters including the shear strength of the subgrade. The selection of some parameter values, calibration and validation of the G-H method are discussed in detail. The G-H method can be expressed as a function of the CBR (California Bearing Ratio). The method is applicable and limited to the following conditions: 1) the subgrade soil is assumed to be saturated and to have a low permeability (silt, clay); 2) through extensive use of the method, it has been determined that is applicable to rut depths ranging between 40 and 100 mm; 3) the minimum required thickness of the base is 100 mm because the G-H base thickness is a compacted base thickness. These limitations are related to the generic aspects of the G-H method.
The Giroud-Han design method for geosynthetic-reinforced unpaved roads
Die Entwurfsmethode von Giroud-Han für mit Geokunststoffen verstärkte, ungepflasterte Straßen
Giroud, J.P. (Autor:in) / Han, Jie (Autor:in)
Geosynthetics ; 30 ; 40-49
2012
10 Seiten, 3 Tabellen, 13 Quellen
Aufsatz (Zeitschrift)
Englisch
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