Permanent Deformation of Subgrade Soils (Phase 1: A Test Protocol)

摘要

Based on comprehensive literature review and repeated load testing on an Arkansassubgrade soil, a test protocol for permanent deformation of subgrade soils was established. The basic configuration and test program proposed in this protocol include: a confining pressure of 21 kPa (3 psi), a repeated load frequency of 1 Hz, a rest period of 0.9 second, a load duration of 0.1 second, a limitation of load application of 10,000 repetitions. Three moisture levels: 105%, 110%, 120% of optimum moisture content, and three density levels: 90%, 95%, 100% of maximum dry density, will be used in fabrication of specimens with a kneading compactor.