摘要：Jilin Province is located in a typical seasonally frozen ground region and has a large quantity of seriously salinized and alkalized soil. Various civil engineering projects were often impacted by frost heave and the repeated freeze-thaw actions of carbonate-saline soil, which caused various engineering disasters. Characterized by its lossless, fast and convenient features, ultrasonic testing technology has been widely used and is rapidly developing. It is a meaningful attempt to detect the change in the microstructure of soil by means of the change in wave velocity. In this paper, a variety of test conditions for the saline soil were developed according to the characteristics of the change in compaction, salt content, water content and climate in saline soil engineering. The wave velocity was measured with an ultrasonic wave metre. This study indicated that the freezethaw cycle could reduce the wave velocity. Without the freeze-thaw process, the wave velocity was inversely proportional to the water content and salt content and was directly proportional to the degree of compaction. However, the impact of water content, degree of compaction and salt content on the wave velocity presented different types of change after the freeze-thaw actions.
关键词：Carbonate-saline Soil;Repeated Freezing and Thawing;Ultrasonic Wave Velocity
