Abstract
The countermeasure of L type retaining wall to frost heave occurred in backfill was studied. Test wall was installed in a filed of Kitami institute of technology. The wall consists of following three sections, 1) back filled with frost susceptible clayey soil, 2) using thermal insulation material, and back filled with frost susceptible soil, 3) backfilled with frost-unsusceptible soil. From Nov. 1999 to April 2002, the freezing lines, displacement of wall, and so on were measured. The effectiveness of replacement method and insulation method was verified through the measurements. Finally, a method to determine replacement range was suggested by using computer numerical simulation of freezing line in backfill.
