Vehicle Mobility on Thawing Soils: Interim Report on CRREL's Test Program.

摘要

Although vehicle mobility in soft and wet soil has been studied in the past, the more complex problem of vehicle mobility on thawing soils has not been addressed. This problem is being examined in CRREL's Frost Effects Research Facility (FERF), where field-scale testing can be conducted under controlled conditions. The soil is frozen and then thawed to the desired test conditions. Traction and motion resistance are measured using an instrumented vehicle. To date, mobility testing has been conducted for nine different thawing conditions of a frost-susceptible silt. The failure mechanisms of the tire-soil interaction were observed, the soil strength was calculated, and vehicle performance was analyzed. For the tire and soil conditions tested, the initial failure of the tire-soil interaction is totally within the soil. At higher tire slip the failure occurs at or near the tire-soil interface. Frost effects research facility, Laboratory tests, Mobility testing, Road damage, Thawing soils, Vehicle mobility. (jes)