Abstract
AbstractThe particle of calcareous sands was forced to crush, then the energy from the crushing was released by the form of sound waves. Therefore the AE technique was used to detect the calcareous sands AE signal when it crushed. by to study the AE characteristics, the mechanics of calcareous sands was studied. Study showed that: (1) there was the AE activities on the low confining pressure condition at the beginnig of test, (2) there was more and more AE activities with the continuing of test until to the end, (3) the calcareous sands’ AE activities was on the whole testing, (4) the calcareous sands’ particle crushing and mutual friction played different roles for its AE activities. Then the AE model based on the calcarous sands’ particle crushing was discussed.
Highlights
The acoustic emission (AE) technique was widely used in the rock mechanics tests at home and abroad, which was used in the in-situ stress testing, monitoring for the rock stability during the dam construction, the slide and the drilling, etc. with abundant accomplishment[1,2]
The particle of calcareous sands was forced to crush, the energy from the crushing was released by the form of sound waves
From the figure 6, it showed that at the beginning of test, the sample volume of calcareous sands was reduced due to squeezing, and its particle was on the process of mutually biting, as a result, there was the AE signal with lower activities
Summary
The acoustic emission (AE) technique was widely used in the rock mechanics tests at home and abroad, which was used in the in-situ stress testing, monitoring for the rock stability during the dam construction, the slide and the drilling, etc. with abundant accomplishment[1,2].The AE technique was introduced in the geotechnical field by R.M. From the figure 6, it showed that at the beginning of test, the sample volume of calcareous sands was reduced due to squeezing, and its particle was on the process of mutually biting, as a result, there was the AE signal with lower activities.
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