Abstract:Ili loess

a typically large-thickness collapsible eolian loess

has parameters that uniformly changes along the depth direction. According to this characteristic and engineering requirements

centrifugal model tests of the self-weight collapsible loess

which has been conducted based on double-line method

is introduced in this paper. The results show that: 1) Settlement is highly affected by the boundary of the model box. 2) When the thickness of loess’ layer reaches 30m

for different saturation soil sample

boundary effect rate is much more than 25% and it is negative exponential attenuation with the increase of load. 3) Self-weight collapsible amount measured by laser displacement sensor

a more reliable measuring way than image acquisition system

is 296.2cm. By analyzing the three types of tests for collapsible loess

the paper gets that compared with that of indoor compression test

the value of centrifugal model test is closer to that of field soaking test. The correction coefficient of centrifugal model test for the Ili loess is 1.19. The centrifugal model test

which can save test cycle and cost

could be used for evaluating the collapsibility of loess owing to its similar stress state with natural foundation.