The Mechanisms by which Fabrics Stabilize Aggregate Layers on Soft Subgrades.

摘要

The U.S. Army Engineer Waterways Experiment Station (WES) conducted a series of traffic tests on various pavement systems over a soft clay subgrade. A loaded truck was driven repeatedly in the same wheelpath over sections consisting of 14 in. of granular base underlain by very soft clay. Two sections contained a layer of fabric between the base and the subgrade and one control section had no fabric or other separators. The two sections containing fabric and the control section are compared in detail. The general behavior of fabric in a pavement system is discussed. A method of anlaysis of the behavior of fabric in a pavement system is presented and used on the two fabric sections. Conclusions are drawn regarding the test series, the use of a fabric layer in pavements in general, the state of the art in pavement design using fabric inner layers, and requirements for future testing. (Author)