Design method for geogrid-reinforced unpaved roads. I. Development of design method

被引:228
作者
Giroud, JP [1 ]
Han, J
机构
[1] GeoSyntec Consultants, Boca Raton, FL 33487 USA
[2] JP GIROUD Inc, Ocean Ridge, FL 33435 USA
[3] Univ Kansas, Dept Civil Environm & Architectural Engn, Lawrence, KS 66045 USA
关键词
unpaved roads; geosynthetics; geogrids; base course; subgrades; road design; bearing capacity; reinforcement;
D O I
10.1061/(ASCE)1090-0241(2004)130:8(775)
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
A theoretically based design method for the thickness of the base course of unpaved roads is developed in this paper, which considers distribution of stress, strength of base course material, interlock between geosynthetic and base course material, and geosynthetic stiffness in addition to the conditions considered in earlier methods: traffic volume, wheel loads, tire pressure, subgrade strength, rut depth, and influence of the presence of a reinforcing geosynthetic (geotextile or geogrid) on the failure mode of the unpaved road or area. In this method, the required base course thickness for a reinforced unpaved road is calculated using a unique equation, whereas more than one equation was needed with earlier methods. This design method was developed for geogrid-reinforced unpaved roads. However, it can be used for geotextile-reinforced unpaved roads and for unreinforced roads with appropriate values of relevant parameters. The calibration of this design method using data from field wheel load tests and laboratory cyclic plate loading tests on unreinforced and reinforced base courses is presented in the companion paper by the authors.
引用
收藏
页码:775 / 786
页数:12
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